r 373

INTERLABORATORY PROGRAMS

FOR RUBBER

ANALYSES NO. 38

OCTOBER - DECEMBER 1978

U. S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS
NBS COLLABORATIVE REFERENCE PROGRAMS

TAPP I Paper and Board (6 times per year)

Bursting strength

Tearing strength

Tensile breaking strength

Elongation to break

Tensile energy absorption

Folding endurance

Stiffness

Air resistance

Grammage

FKBG-API Containerboard (48

Smoothness

Surface pick strength

K & N ink absorption

PH

Opacity

Blue reflectance (brightness)

Specular gloss, 75°

Thickness

Concora (flat crush)

Ring crush

times per year)

Mullen burst of linerboard

Concora test of medium

MCCA Color and Appearance (4 times per year)

Gloss at 60°

Color and color difference

Retroreflectivity

Rubber (4 times per year)

Tensile strength, ultimate elongation and tensile stress

Hardness

Mooney viscosity

Vulcanization properties

ASTM Textiles (3 times per year)

Flammability (FF3-71 and FF5-74)

ASTM Cement (2 times per year)

Chemical (11 chemical components)

Physical (8 characteristics)

AASHTO Bituminous

Asphalt cement (2 times per year)

Cutbacks (once a year)

Collaborative Reference Programs

B360 Polymer Building

National Bureau of Standards

Washington, D.C. 20234

let

§319
INTERLABORATORY PROGRAMS

FOR RUBBER

Analyses No. 38

October - December 1978

J. Horlick

Office of Testing Laboratory Evaluation Technology

Office of Engineering Standards

National Engineering Laboratory

T. L. Cummings, Research Associate,

Collaborative Testing Services, Inc.

G. W. Bullman

Polymers Science and Standards Division

Center for Materials Research

National Measurement Laboratory

U. S. DEPARTMENT OF COMMERCE

National Bureau of Standards

NBSIR 79-1373

INTRODUCTION

This report summarizes the test results for the fourth quarter of 1978.

The tests cover the four areas in the NBS Collaborative Reference

Programs for Rubber: Tensile Properties, Hardness, Mooney Viscosity,

and Vulcanization Properties.

For each of the four areas, there is a set of summary tables followed

by a table of data and analysis by laboratory and a graphical presentation of the data and analysis. Where applicable, the tables of data have

the English and Metric expressions side-by-side. Additional details are given in the section "Key to Tables and Graphs."

If there are questions or comments on the notes, the analyses, or the

reports in general, contact Jeffrey Horlick at (301) 921-2946.

Jeffrey Horlick, Administrator

NBS Collaborative Reference Programs

Office of Testing Laboratory Evaluation Technology

June 4, 1979

TABLE OF CONTENTS

Page

Introduction

Table of Contents 1

Key to Tables and Graphs 2

Program 1: Tensile strength, ultimate elongation

and stress at 300% elongation 5

Program 2: Hardness 13

Program 4: Mooney Viscosity 17

Program 5: Vulcanization characteristics determined

with oscillating-disk cure meter 21
KEY TO TABLES AND GRAPHS

LAB CODE Confidential laboratory identification number known only

to the participant and the Collaborative Reference Program

staff

.

F A flag identifying results that are extreme in comparison

with the other results.

X - The plotted point for the indicated laboratory lies

outside of the 99% error ellipse (not shown); ie,

assuming normal distribution, 99% of laboratories

similar to those participating in the program will

be represented by points lying within the 99% ellipse.

* - The plotted point for the indicated laboratory lies

outside of the 95% error ellipse shown on graphs, but

inside the 99% ellipse.

MEAN The arithmetic average of the two median values for the two

sheets or samples of the same material.

% DEV The deviation or difference of the laboratory MEAN from the

GR. MEAN (see below) , expressed as a percent of the

GR. MEAN.

REL SDR The ratio of the SDR (standard deviation of replicate measurements within a laboratory) to the AVER SDR (see below) . Extreme values, ie, values that are likely to occur by chance

less than one time in a hundred as determined by the chisquare test, are marked with an "X".

VAR CODE A code number designating a particular test instrument, set

of environmental conditons, procedure, unit used, or other

variation. The code "01" designates the instrument, conditions

and procedure specified at the top of the page either explicitly

or in the cited ASTM Standard, and the unit of test shown at the

top of the first column of data. A ' + ’ in front of the VAR CODE

indicates that the data has been excluded from the grand means

due to a non-standard variation of the possibilities mentioned

above, or the data is extreme.

GR MEAN The arithmetic average (grand mean) of all the laboratory MEAN

values, excluding those flagged (F) with an "X".

SD MEANS The standard deviation among the laboratory MEAN values included in the GR. MEAN.

2
AVER SDR The arithmetic average of all the standard deviations of

within laboratory replication, excluding those excluded

from the GR. MEAN and excluding any additional ones for

which the REL SDR has been flagged.

GRAPH

For each laboratory the MEAN for the second material is plotted against

the MEAN for the first material, with each point representing a laboratory. The horizontal and vertical lines are the GR. MEAN values. The

dashed line is drawn at 45°. The solid sloping line, which may or may

not lie close to the 45° line, is the major axis of the ellipse. The

ellipse is drawn so that, on the average, it will include 95% of the

points representing the laboratories. The plotted symbols X and * used to

represent results falling outside the ellipse are explained under "F"

above. Laboratories inside the ellipse (no flag in the F column) are plotted as an 0.

The graph is plotted with an ellipse when there are 20 or more laboratories

in the analysis. When there are 10 through 19 laboratories in the analysis,

the graph is plotted but the ellipse is omitted. When there are fewer

than 10 laboratories retained in the Grand Mean the graph is not plotted.

For development of the theory, see the paper by J. Mandel and T.W. Lashof,

Interpretation and Generalization of Youden's Two-Sample Diagram, J. of

Quality Technology, Vol. 6, pp 22-36, Jan. 1974.

SUMMARY OF ANALYSES

LABS INCL Number of laboratories included in the GR. MEANs.

LABS OMIT Number of laboratories reporting data but excluded from

the GR. MEANS,

STANDARD DEVIATIONS

LABS Same as the SD MEANs (see above)

SHEETS Standard deviation between the two sheets or samples of the same material.

REPL Same as AVER SDR (see above)

PRECISION OF METHODS

REPL GRP The number of replicate measurements per sheet or sample,

as specified in the Collaborative Reference Program.

REPL ASTM The number of replicate measurements specified for a test

result in the designated ASTM Standard.

3
REPEAT The repeatability, a measure of the within laboratory precision,

i.e., of the ability of the test technician to repeat his test

result: two test results obtained by the same technician on

the same homogeneous sample of material may be expected 95% of

the time to agree within the repeatability.

REPROD The reproducibility, a measure of the between laboratory precision: two test results obtained in different laboratories

may be expected 95% of the time to agree within the reproducibility.

ABSOLUTE Values of REPEAT and REPROD expressed in the units of measurement

PERCENT Values of REPEAT and REPROD expressed as a percent of the GR.

MEANS

.

4
REPORT 38 l IN TER LABORATORY PROGRAM ON EVALUATION OF RUBBER OCTOBER 1978

300*

300*

300 *

300*

TENSILE STRENGTH, ULTIMATE ELONGATION, AND STRESS AT 300% ELONGATION

NOTES

Materials D81 and D82 were sheets of the same vulcanized rubber. Similarly, materials D83 and D84 were alike.

V100 results were obtained at NBS using a pendulum tester.

All participants used Die C in ASTM D412 with the following exceptions:

V070 used ASTM Die V126 used Die 2 in V213 and V225 used

BBS903 ASTM Die D V208 did not specify a Die

INSTRUMENTS

Number of Percent of Tester Used Labs Labs

Electronic Manual 20 32% Electronic Automatic 24 38% Pendulum Manual 17 27% Pendulum Automatic _2 3%

63 100%

REPORTED RELATIVE HUMIDITY

Number of Percent

RH Labs Labs

Above 55% 13 21% Below 45% 14 22% 45% - 55% 28 44% Not Reported 8 13%

63 100% SUMMARY OF ANALYSES

LABS LABS STD DEVIATIONS

PROPERTY MATERIAL INCL OMIT GR 0 MEAN LABS SHEETS REPL UNITS

TENSILE D81 -D82 6 1 3 2736o 89 0 43 0 70 o POUNDS PER SQUARE INCH STRENGTH D83-D84 6 1 3 2706 o 86 0 62 0 63 e POUNDS PER SQUARE INCH TENSILE Dei-D82 62 2 1 80 87 o 6

1

o2S ©48 MEGAPASCALS

STRENGTH De3-D84 62 2 1 80 66 o 59 o 43 ©43 MEGAPASCALS

ULTIMATE D81-D82 60 4 6 19 o 1 8 0 50 1 5 o PERCENT ELONGATION De3-D84 60 4 6 1 4 o 1 80 6 0 16 c PERCENT

STRESS AT D81-D82 63 I 1 167 0 74o 18 0 25c POUNDS PER SQUARE INCH ELONGATION D83-D84 63 1 1 1 52o 770 1 9o 28 0 POUNDS PER SQUARE INCH STFESS AT D81-D82 63 1 80 04 9 o 5 1 1 o 156 O 175 MEGAPASCALS ELONGATION D83-D84 63 I 7 o 946 O 532 o 164 o 191 MEGAPASCALS

PRECISION OF METHODS

REPL REPL ABSOLUTE PERCENT

PROPERTY MATERIAL CRP ASTM GR0 MEAN- REPEAT REPROD UNITS REPEAT REPROD

TENSILE D81-D82 5 5 27360 194 0 246o PSI 7 o 1 9.0 STRENGTH D83-D84 5 5 2706o 1 7 50 2380 PSI 6 0 4 8 0 8 TENSILE D 81-D82 5 5 1 8 0 87 lo 34 1 o 7C MEGAPA 7 o 1 9.0 STRENGTH D83-D84 5 5 1 So 66 io 20 lo 64 MEGAPA 6 o 4 8 0 8

ULTIMATE D81-D82 5 5 619 0 420 50 e % 6o 7 8. 1 ELONGATION D83-D84 5 5 6 14 c 430 51, % 7 0 1 8 0 2

STRESS AT D81-D82 5 5 1 167 0 70 o 20 50 PSI 6 C O 1

7

0 6 ELONGATION D83-D84 5 5 1 1 52 0 77 o 2 1 4 C PSI 6« 6 18 0 6 STRESS AT D8 1-D82 5 5 80 049 o 485 lo 416 MEGAPA 6 0 0 17 e 6 ELf VGATION D83-D84 5 5 7 © 946 o 528 lo 474 MEGAPA 6 o 6 180 6

5
I NTERLABORATORY PROGRAM ON EVALUATION OF RUBBER

REPORT 38-1 TENSILE STRENGTH - POUNDS PER SQUARE INCH OCTOBER 1976 MATERIAL D81-D82 MATERIAL D83-D84 COMMERCIAL TIRE TREAD SBR

LAB MEAN MEAN % REL MEAN MEAN % REL VAR CODE F PSI MEGAPA DEV SDR PSI MEGAPA DEV SDR CODE INSTRUMENT, UNIT, OR 0TH ER VARIATION

VO 066 X 287 50 19. 83 5. 1 1 o 9 8X 2670. 18.41 -lo 3 1.99 C 1 V0067 26 00c 17.93 -50 0 .36 2525. 17 0 4 1 -6.7 1.04 0 1 VO 069 27 50 o 18.97 o 5 1.88 2809. 1 9 0 38 3o 8 1.75 01 VO 07 0 2840 o 19o 59 3o 8 o 97 2815c 19o 41 4 o 0 ©73 0 1 VO 0 7

1

2637 0 18. 19 -3 e 6 o 7 4 2616. 1 8 C 04 -3 0 3 o 79 0 1

VO C 72 * 266C o 19.72 4o 5 1.74 2920c 20c 14 7.9 1. 21 C 1 VO C 76 2 855o 19.69 4 o 3 .77 2775. 19. 14 2o 5 1 o 02 e i V0078 256 2o 17.67 -6c 3 .68 2552c 1 7 0 60 -5.7 lo 05 01 vooei 27 63o 19.05 loO 1.32 2792. 1 9o 25 3o 2 .61 20 ORIGINAL IN MEGANEWTONS PER SQ 0 METER

VO 0 83 26 55o 18.31 -3c 0 o 99 2630© 1 So 14 -2o 8 o 99 01

V0C84 26 1 0 o 18.00 — 4 0 6 • 77 2630. 18. 14 -2C 8 1.07 0 1 VO 0 85 27 27 o 18. 80 -.3 1.63 2690c 1 8 o 55 -o 6 o 8 1 20 ORIGINAL IN MEGANEWTONS PER SQ. METER

VO 0 87 27 OC o 1 8. 62 - lo 3 .87 2705c 1 8.66 -oO 1 o 38 01

VO 0 88 » 2483* 17. 12 -9o 3 1.01 2460c 16.97 -90 1 2o 10X 0 1 V0092 26 25 o 18.10 -4 C 1 1 c 0 7 2600. 17c 93 -3.9 1.08 0 1

V0095 2930c 20.21 70 1 1.19 2 9 05. 20c 03 7o 3 lo 36 01

VO 0 96 26 24 0 18. 10 -4c 1 • 30 2592c 17.88 -4c 2 • 52 0 1 VO 1 00 2790 o 19o24 2e 0 o 94 2715c 1 8 C 72 « 3 1.08 01 V01 02 2650c 18.28 -3e 2 .84 2575. 1 7 0 76 -4 o 8 o59 01

V01 1 1 2820c 19.45 3 0 1 o 95 2735c 1 8 0 86 lo 1 o 75 01

VC 1 17 2725c 18.79 -O 4 c 44 2700. 1 8 0 62 -o 2 .63 0 1 VO 1 20 27 6C e 19.03 o 9 o 9 8 2727. 1 8o 81 o 8 1.30 01 V01 22 2552c 17. 60 -6c 7 c 87 2580c 1 7c 79 -4.7 1 o 97X 01

V01 23 2800c 19. 31 2 0 3 .78 2775. 19o 14 2.5 o 57 01 VO 1 26 2e26 0 19. 51 3c 4 .77 2741c 18. 90 lo 3 o 9 1 20 ORIGINAL IN MEGANEWTONS PER SO. METER

VO 126 2785® 19. 2 1 1 o 6 1 .09 2680. 1 8e 4

8

-1.0 1.31 0 1 VO 141 2773® ic, 13 1 o 4 . 86 2748c 1 8. 96 1 o 6 1.22 0 1 VOl 44 2850 c 19.66 4c 2 • 79 2795. 1 9o 28 3.3 .44 0 1 VOl 44B 2e70« 19. 79 4 0 9 o 96 2790. 19c 24 3o 1 1. 18 01

VO 1 46 2841c 19. 60 3o 8 1.07 2726. 1 8 0 80 o 8 .88 0 1

VO 1 48 267 5c 19.83 5o 1 1.24 2800. 1 9 0 3

1

3. 5 2. 60 X 0 1 VO 1 49 2810c 19. 38 2c 7 1.37 2766c 19© 08 2. 2 20 38X 01 VOl 50 2735© 16. 86 -o 0 • 78 2660. 1 8.34 - 1 0 7 1. 88 01 VO 1 52 * 2630® 18. 1 4 -3 0 9 1.65 2735c 1 So 66 lo 1 o 70 01

VO 153 2633c 18. 16 -3c 8 .88 2590© 17.87 ro 0 1 1.62 0 1

VO 154 2840c 19.59 3. 8 1.61 2750 o 18.97 lo 6 lo 12 0 1 VOl 56 2755c 19.00 o 7 • 97 2785. 1 9 C 21 2.9 2. 76 X 0 1 VO 1 58 2775© 19. 14 1 o 4 1.29 2792c 19 e 25 3o 2 .86 20 ORIGINAL IN MEGANEWTONS PER SO. METER

V0160 2712® 1 8.70 -c 9 1.24 2632c 1 9o 1 5 -2 0 7 lo 13 20 ORIGINAL IN MEGANEWTONS PER SO© METER

VOl 66 2867c 19.77 4 C 8 .61 2831. 1 9. 53 4 © 6 1 o 32 0 1

VO 168 2802c 19.33 2 0 4 1.17 2755c 1 9o C 0 1.8 1.71 C 1 VO 169 2690c 18.55 - lo 7 1 . 38 2705c 1 8 0 65 -O o 1.45 20 ORIGINAL IN MEGANEWTONS PER SO. METER

VOl 76 2705c 1 8.66 -lo 1 o 56 2680c 1 8. 48 - lo o .56 0 1 VOl 77 2735c 18. 86 -O o 1.08 2695. 1 8c 59 -O 4 o 7

1

0 1 VO 1 84 2755c 19.00 o 7 o 9 5 2766. 1 9c 08 2o 2 . 86 C 1

VO 190 2675 0 18.45 -2.2 1.04 2656c 18.32 -1.9 1.48 0 1 VO 199 27 60 c 19.03 o 9 1. 13 2685. 18.52 -o 8 .56 0 1 VO 207 2750c 18.97 O 5 .40 2700. 18.62 -o 2 .43 0 1 VO 20 8 2698* 16.60 -1.4 1.41 2719. 18.75 o 5 • 95 20 ORIGINAL IN MEGANEWTONS PER SO. METER

VO 2 13 X 1906, 13. 15 -30.3 .63 1 920. 13. 24 -29.0 .65 60 DATA NOT UNDERSTOOD

VC2 14 2727* 18.80 -O 3 1.06 27 19. 1 8c 75 o 5 o 90 20 ORIGINAL IN MEGANEWTONS PER SQo METER

V0220 2737* 1 8. 86 oO 1.06 2700c 1 8 0 62 -O 2 1.42 0 1 VO 223 2702c 18.64 -U2 .90 2685. 18.52 -O 8 .90 0 1 VO 224 277 So 19. 1 4 1* 4 . 89 2740. 16.90 lo 3 1. 19 0 1 VO 225 27 18* 18.75 “ o 6 1.27 2657. 18. 32 - lo 8 .55 0 1

VO 2 32 2680. © • p a> -2© 1 • 75 2637. 18.19 - 2c 5 . 98 01 VO 2 33 2787* 19.22 1.9 • 87 2646. 18.25 -2o 2 • 99 0 1 VO 235 X 2177c 15.02 1 o p .73 2252. 15o 53 - 16o 8 1.06 C 1 VO 2 38 2770* 19. 10 1 o 2 .88 2755. 1 9 0 00 lo 8 • 97 0 1 V0243 269 2* 18. 57 - 1.6 1.0 1 2650. 1 8.28 -2o 1 1.39 0 1

VO 244 2688c 18.54 -lo 8 • 81 2702. 1 8.64 -o 1 o 4 l 21 ORIGINAL IN KILOGRAMS/SO. CENTIMETER

V0245A 2774. 19. 13 lo 4 . 83 2788c 19c 23 3. 0 1.18 0 1 V0245B 2660© 18.34 -2c 8 1.09 2660c 18.34 - 1 o 7 o 66 0 1 V0250 27 25. 1 8. 79 — o 4 .81 27 25. 1 8 0 79 o 7 .56 0 1

2736. •

>J - GR0 MEAN - 2706. 1 8.66 5 TEST DETERMINATIONS

89. .6 1 - SD MEANS - 86 0 .59 61 LABORATORIES IN GRAND MEANS

70. . *8 • AVER SDR “ 63. .43 64 LABORATORIES REPORTING

PSI MEGAPA - UNIT PSI MEGAPA

6
MATERIAL

D83-D84

TENSILE STRENGTH

MATERIAL 081-082 2736. PSI MATERIAL D83-084 2706. PSI

MATERIAL D81-D82

7
I

INTERLAB6RAT6RY PR6GRAM GN EVALUATION OF RUBBER

REPORT 38 - 1 ULTIMATE ELONGATION - PERCENT OCTOBER 1978 MATERIAL D81 -D82 MATERIAL D83- D84 COMMERCIAL TIRE TREAD SBR LAB MEAN % REL MEAN % REL VAR CODE F % DEV SDR % DEV SDR CODE INSTRUMENT, UNIT, OR OTHER VARIATION

VO 0 66 610o -1.4 1.00 610© -©7 1© 68 01

VO 067 600© -3. 1 .42 587© — 4© 4 .93 01 V0069 615 e ” o 6 1.70 620© ©9 1 o 0 5 0 1 V007C 6 12o -l.C .54 612© -O 3 © 69 0 1 V007 1 596 0 -3©7 .85 603© - 1© 8 e 91 0 1

V0072 635© 2.6 1.67 625© 1 o 7 1 © 37 01 VO 0 76 6 00 o -3© 1 1.15 585© -<i © 8 ©96 0 1 V0076 605, -2© 3 .99 595© -3© 1 © 68 0 1 V0081 63 lo 2.0 lo 23 629© 2© 5 © 95 01

VO 0 83 622o o 6 1©00 612© -©3 1© 09 01

V0084 580* -6©3 ©63 585© -4© 8 © 84 01

VO 0 85 640© 3© 4 1.54 635© 30 4 1© 06 01

VO 0 87 * 569© -8© 0 1 o 07 568© -7©5 1© 14 0 1 V0088 602© -2©7 1 o 4 1 598© -2©6 1© 73 01 V0092 635© 2©6 1.07 620© .9 1© 1 1 01

VO 095 620© o 2 1.22 615© e 1 1© 31 01 VO 0 96 609© -1.5 ©52 606© -1.3 o 44 0 1 V01 00 615© -.6 .74 615© © 1 © 90 0 1 VO 1 02 625© 1.0 • 43 615© o 1 © 87 0 1 V01 1 1 579© -6© 4 3© 1 6X 577© -6© 0 1 o 25 01

VO 1 17 630© 1 © 8 .38 625© 1.7 ©43 0 1 VO 120 630© 1 o 8 1© 1 5 630© 2© 6 1 © 69 01 V01 22 630© 1© 8 1.03 630© 2© 6 1© 70 01

VO 1 23 630© 1© 8 .75 630© 2© 6 © 85 01

V01 26 638© 3© 1 1.05 63 0© 2©6 © 76 0 1

VO 128 630© 1© 8 © 99 615© . 1 . 96 01

VO 1 4 1 6?° 0 © 2 ©83 635© 3© 4 .72 0 1 V01 44 620© .2 1 o 29 635© 30 4 ©57 0 1 VO 144B 615© -.6 1© 13 615© o 1 © 82 0 1 VO l 46 * 660© 60 6 1 o 2 1 637© 3© 8 ©47 0 1

VO 148 «• 612© • 1 © 0 • 98 587© -4© 4 2. 46X 01 VO 1 49 612© -1,0 1.02 602© - 1.9 2© 0 1

X

0 1 V01 50 610© -1.4 .66 600© -2o 3 1© 89 01

VO 152 X 570© -7.9 lo 43 612© -.3 ©64 0 1 VO 1 53 610© -1.4 1 . 00 610© -O 7 1© 48 0 1

VC 154 605© -2o 3 1.32 590© — 4 o 0 1© C5 0 1 VC 156 615© -.6 1.21 610© -.7 2© 56X 0 1 VO 158 635© 2.6 1.37 635© 3© 4 .92 0 1 VO 160 605© -2.3 1.03 600 j -2© 3 1© 10 0 1 VO 1 66 620© .2 .66 60S o - 1 o 5 1© 09 01

VO 168 625. 1.0 • 61 620© .9 1© 01 0 1 VO 169 627. 1. 4 1.45 630© 2 o 6 1© 04 0 1 VO 176 640© 3© 4 .70 620© .9 1© 29 01 VO 177 645© 4© 2 1.07 640© 4©2 1© 10 01

VO 1 84 630© 1© 8 1.55 625© 1 o 7 1© 19 01

VO 190 630. 1.8 1.27 635. 3.4 1© 07 0 1 VO 1 99 X 770© 24. 4 2.97X 775© 26.2 3© 56X 0 1 VO 2 07 X 632© 2© 2 .32 690© 12© 3 ©35 0 1 V0208 600© -3© 1 l© 17 590© -4© 0 1© 12 0 1 V02 13 608© -1© 8 .84 616© .3 © 95 0 1 V02 14 635. 2.6 1. 10 635. 3© 4 .93 01 V0220 615. -.6 .98 615© . 1 1© 00 0 1 V0223 605© -2.3 • 95 610© -.7 ©57 0 1 V0224 620. .2 1 ©00 620© ©9 1© 35 01 V0225 5e7© -5© 1 1.06 580© -5©6 ©94 01

VO 2 32 647. 4.6 .70 637© 3. 8 2© 15X 0 1 V0233 605© -2.3 1.26 590© -4© 0 ©68 0 1 V0235 X 490© -20© 8 .54 490© -20©2 ©90 0 1 V0238 615. -.6 ©88 610© -.7 © 78 0 1 V02 43 625. 1.0 1.32 620© o 9 1© 16 0 1 V0244 610© - 1.4 • 46 615© o 1 © 46 0 1 V0245A 650© 5.C .78 655. 6©6 . 75 0 1 V0245B 655. So 8 .93 640© 4© 2 ©82 01 V0250 630© 1 © 8 .72 615© o 1 © 32 0 1

619© - OR © MEAN • 614© 5 TEST DETERMINATIONS

i Q© - SD MEANS • 18© 60 LABORATORIES IN GRAND MEANS

1 - AVER SDR - 16© 64 LABORATORIES REPORTING

% - UNIT %

8
MATERIAL

D83-D84

ULTIMATE EL0NGATI0N

MATERIAL 081-082 619. Z. MATERIAL 083-084 614. Z.

9
INTERLAB0RATORY PROGRAM ON EVALUATION OF RUBBER

REPORT 36 - 1 STRESS AT 300* ELONGATION - POUNDS PER SQUARE INCH OCTOBER 1978 MATERIAL D81-D82 MATERIAL D83-D84

COMMERCIAL TIRE TREAD SBR

I AB MEAN MEAN % BEL MEAN MEAN % REL VAR C6DE F PSI MEGAPA DEV SDR PSI MEGAPA DEV SDR <CODE INSTRUMENT, UNIT, OR OTHER VARIATION

VO 0 66 1 1 850 8© 172 1©5 1 © 73 1 1 55© 7 o 966 .2 1© 22 0 1 VO 067 1150 o 7 © 93 1 -1© 5 ©70 1150© 7© 931 -O 2 o 40 0 1 V0069 1 1 37 o 7© 84 1 -2© 6 1© 18 1161© 8© 010 o 8 1© 28 "l

VO 070 1 1 9 0 o 8 0 2 07 2© 0 1 © 29 1170© 8© 069 1 o 5 t 68 0 1 VO 07

1

12 23c 8© 438 4© 8 1© 14 1 1 74© 8© 097 lo 9 1© 20 0 1

V0072 1160© 8 0 CO

0

-©6 o 74 1200© 8© 276 4© l 1© 24 01

VO 0 76 1280. 8© 828 9© 7 1 o 0 8 1265. 8©72* 9© b o 40 0 1 VO 078 1081© 7© 455 -7© 4 1 © 33 1143© 7© 68.3 -o 8 1.46 01

VO 0 81 1131© 7© 802 -3© 1 © 83 1131© 7© 802 -1© 8 1 o 74 20 ORIGINAL IN MEGANEWTONS PER SO© METER

VO 0 83 1175© 8© 103 o 7 o 7 0 1 165© 8© 034 lo 1 ©68 01

VO 0 84 1190© 8© 207 2.o 0 .66 1165© 8©C34 lo 1 o 60 0 1 VO 0 85 1117© 7© 7 02 -4©3 ©98 1 146© 7 c 902 -0 6 ©76 20 ORIGINAL IN MEGANEWTONS PER SO© METER

VO 0 87 1315© 9© 069 12© 7 1© 50 1315© 9© 069 14© 1 1. 11 01

VO 0 88 10 11© 6© 976 • 1 3© 3 1 © 32 1042© 7© 190 -9© 5 lo 02 0 1 V0092 1030© 7. 103 -1 1© 8 1.88 1070© 7© 379 -7© 1 lo 9

1

01

V0C95 1240© 8o 552 6© 2 .84 1220© 8o 4 1 4 5© 9 .97 01

VO 0 96 1 1 49© 7© 9 2 8 -1© 5 ©84 1 144© 7 C 890 -O 7 © 79 0 1 VO 1 00 1190© 8o 2 07 2© 0 1. 17 1 1 35© 8© 172 2© 8 .74 0 1 V01 02 1115© 7 0 69 0 -4© 5 .42 1045, 7 © 207 -9©3 o 99 0 1 V01 1 1 1295© 8© 931 1 1© 0 • 71 1260© 8© 690 9© 4 1© 13 0 1

VO 1 17 1150© 7.931 - 1© 5 .97 1125© 7© 759 -2©4 © 87 0 1 VO 1 20 1176© 8© 1 14 o a ©39 1 1 75© 8© 103 2© 0 1© 13 0 1 VO 122 * 975© 6© 72

4

-16© 5 © 86 1 032© 7© 121 -10©4 © 89 0 1 VO 123 1200© e© 276 2© 8 o 42 1160© 8© 000 o 7 o 43 0 1 VO 126 1162© 8© 012 -O 5 1 o 0 0 1097© 7© 567 -4© 8 1© 16 20 ORIGINAL IN MEGANEWTONS PER SO© METER

VO 128 1215© 8©379 4© 1 1.29 1 1 30© 8© 138 2© 4 ©46 0 1 V01 41 118 1© 6. 143 1 o 2 1© 17 1110© 7© 659 -3©6 © 83 01

VO 1 44 1 1 10© 7© 655 -4© 9 1© 05 1085© 7© 483 -5© 8 1© 10 01 V0144B 1250© 8© 621 7© 1 1© 17 1205. 8© 310 4© 6 1.26 0 1 V01 46 1123. t© 745 -3© 8 • 56 1 1 34© 7© 824 -1© 5 • 91 0 1

VO 148 1212© 8o 362 3© 9 1.46 1250© 6o 62

1

8© 5 1© 28 0 1 VO 1 49 1213© 8© 369 4© 0 • 79 1 1 96© 8© 248 3© 8 1 o 02 0 1 V01 50 1210© 8©345 3© 7 1© 58 1 1 85© 8© 172 2© 8 1 © 39 0 1 V01 52 1210© 8© 345 3©7 • 30 1165© 8© 034 lo 1 ©68 01

VO 1 53 1 164© 8© 031 -o 2 lo 12 1 1 39© 7© 855 -lo 1 1© 50 0 1

VO 154 1265© 8©724 8© 4 1 ©0 1 1200© 8© 276 4© 1 • 83 0 1 V01 56 1200© 8© 276 2© 8 • 81 1 230© 8© 483 6© 7 © 89 0 1 VOi 58 1179© 8© 132 1© 0 ©28 1 1 56© 7© 972 o 3 © 89 20 ORIGINAL IN MEGANEWTONS PER SO© METER

VO 160 1255© 8©652 7© 5 ©69 12 04© 8© 302 4© 5 ©56 20 ORIGINAL IN MEGANEWTONS PER SO. METER

VO 166 1166© 8© 045 -O 1 . 86 1 184© * 8© 166 2© 8 ©55 01

VO 168 1127© 7© 776 -3© 4 ©70 1 150© 7 o 93 1 -o 2 2© 52X 01

VO 169 1C 88 o 7© 502 -6© 8 1.42 1 059© 7 © 302 -8© 1 .97 20 ORIGINAL IN MEGANEWTONS PER SQ© METER

VO 176 1125© 7.759 -3©6 1© 88 1 105© 7©62 1 -4© 1 1.33 01

VO 177 1 1 20 © 7© 724 -4. 0 ©77 1040© 7© 172 -9© 7 ©64 01

VO l 84 1207© 8 0 32 8 3© 5 • 65 1 167© 8 0 052 1 © 3 1.43 0 1

VO 190 1 164© 8 o 0 28 -© 3 0 ® 1 163© 8 0 024 lo 0 1.46 0 1 VOI 99 * 1125© 7©759 -3©6 1.42 10 20© 7© 034 -1 1©5 1 © 33 0 1 VO 2 07 * 1055© 7© 27 6 -9© 6 1.65 960. 6 0 62 1 -16©7 1© 9

1

0 1 V0208 1233© 8© 502 5© 6 1 o 76 1240© 8© 552 7©6 2©43X 20 ORIGINAL IN MEGANEWTONS PER SO© METER

V0213 X 852© 5© 876 -27© 0 .75 839© 5© 790 -27© 1 ©66 60 DATA NOT UNDERSTOOD

VC 2 14 1153© 7© 952 -lo 2 • 26 1 146© 7© 902 -o 6 • 00 20 ORIGINAL IN MEGANEWTONS PER SQ. METER

VO 2 20 1145. 7© 897 - 1© 9 • 76 10 87© 7© 500 -5© 6 .54 0 1 V0223 1182. 8. 155 1© 3 .81 1 1 52© 7 o 94 8 ,0 • 94 C 1 V0224 1227© 8© 466 5©2 2.42X 1275. 8© 793 1 0 o 7 © 84 0 1 V0225 1333© 9© 193 14© 2 1 • 2 1 1315© 9© 069 14© 1 1 © 45 01

VO 232 1105© 7©621 -5© 3 • 82 1070© 7 0 379 -7© 1 ©54 0 1 VO 2 33 1220© 8.4 14 4© 5 • 81 1220. 8© 4 14 5© 9 o 77 01 V0235 1259© 8©683 7© 9 1.03 12 89© 8© 893 1 1© 9 1© 14 0 1 V0238 1147© 7© 914 - lo 7 1. 14 1 145© 7© 897 -o 6 © 66 01 V0243 1102© 7© 603 -5©5 1.22 1 026© 7© 076 -1 1© 0 1.47 0 1

VO 244 128C© 8© 828 9© 7 1.62 1 266. 8 0 730 9© 9 lo 06 21 ORIGINAL IN KILOGRAMS/SO© CENTIMETER

V0245A 1041© 7© 1 83 -1 0© 8 © 80 1017© 7© 014 - 1 1©7 1 © 22 0 1 V0245B 1017© 7© 0 14 -12© 9 © 82 1031© 7© 1 1 0 -1 0©5 .68 01 V0250 1087© 7© 50 0 -6© 8 .79 1 1 25. 7 o 759 -2©4 .70 0 1

1 8© 049 GR© MEAN -

1 152© 7© 946 5 TEST DETERMINATIONS

© 51 1 • SD MEANS - 77© © 532 63 LABORATORIES IN GRAND MEANS

25© O 175 AVER SDR - 28© © 191 64 L ABO PA TOR I ES REPORTING

PSI MEGAPA • UNIT PSI MEGAPA

10
MATERIAL

D83-D84

STRESS AT 3007. ELONGATION

MATERIAL D81-082 1167. PSI MATERIAL D83-D84 1152. PSI

11
"

pi p
REPORT 38 2 INTERLABORATORY PROGRAM ON EVALUATION OF RUBBER OCTOBER 1978

HARDNESS

NOTES

Materials D81 and D82 were sheets of the same vulcanized rubber. Similarly, materials D83 and D84 were alike.

V200 results were obtained at NBS using ASTM D2240.

Three of the 30 participants reporting used ASTM D1415 (Wallace) for the hardness determination. One participant did not report

the instrument used. All others used ASTM D2240 (Type A Durometer)

.

SUMMARY OF ANALYSES

LABS LABS STD DEVIATIONS

PROPERTY MATERIAL INCL OMIT GRo MEAN LABS SHEETS REPL UNITS

HARDNESS D81-D82 3 1 0 580 14 1 o 94 o 18 © 42 IRHD

D 83-D84 31 0 57o 90 1 o 33 o 14 o 44 IRHD

PRECISION OF METHODS

REPL REPL ABSOLUTE PERCENT

PROPERTY MATERIAL CRP ASTM GRo MEAN REPEAT REPROD UNITS REPEAT REPROD

HARDNESS D81-D82 5 5 580 14 lo 17 5 C 37 IRHD 2o 0 9o2 D83«D84 5 5 57o 90 lc 21 5c 07 I RHD 2c 1 8* 8

13
INTEELABeRATURY PR6GRAM 6N EVALUATION OF RUBBER

REPORT 38-2 HARDNESS - IRHD OCTOBER 1978 MATERIAL D81- D82 MATERIAL D83-D84 C6MMERCIAL TIRE TREAD SBR

LAB MEAN % HEL MEAN % REL VAR

C6DE F IRHD DEV SDR IRHD DEV SDR CODE INSTRUMENT, UNIT, OR OTHER VARIATION

VO 065 57 o 50 -1. 1 1* 17 57.00 -1.6 1. 47 0 1 VO 0 70 58c 00 -O 2 1.48 58.50 1.0 1. 58 01 V0C71 58 0 00 -. 2 1© 17 58.00 .2 I. 25 01 V0C72 56 0 5 0 -2.8 1.52 57.00 -1.6 1. 25 01

VC 0 78 57« 00 -2.0 .00 57.00 -1.6 1. 14 01

V00 81 59 o 50 2.3 1.18 60. 00 3.6 .51 01 V0084 59 0 00 1. 5 .65 58. 00 o 2 1. 14 01 V0085 6 0 o 00 3© 2 .65 58.65 1.3 . 64 0 1 VO 0 87 61.50 5© 8 .53 61.50 6.2 . 00 01

VO 0 88 57 o 50 -io 1 1. 17 57. 5 0 - o 7 1. 14 0 1 V0092 57o 50 - lo 1 1. 17 57.50 -.7 1. 25 01 V0C95 56o 00 -3.7 .53 56. 00 -3.3 . 00 0 1 VO 102 62© 00 6.6 1.56 62.00 7. 1 . 63 01 V01 1 1 55©50 2o 3 1.29 59.5 0 2.8 . 63 0 1 VO 122 58© 00 -•2 .00 57. 5 0 -« 7 .63 0 1

VO 1 28 55 0 50 -4.5 1.29 56.50 -2.4 1. 02 01

VO 141 54* 50 -6.3 1*17 54. 50 -5.9 1. 14 01

VO 144 6 1 © 50 5.8 .53 6 1. 00 5.3 1. 25 01 V0144B * 61. 50 5.8 1. 17 59.50 2.8 1. 14 01

VO 168 59 0 00 1*5 .59 58.75 1.5 .63 0 1

VO 169 57.00 -2.0 ©53 57.00 - 1.6 .51 0 1 VO 176 56 0 50 -2.8 1.06 56.50 -2.4 1. 02 01

VO 190 6Co CO 3. 2 1.17 5 9.50 2.8 o 63 01 V0200 56 0 5 0 -2.8 .59 56. 00 -3.3 o 47 01 V0206 58 o 65 o 9 1. 10 57. 65 -O 1 1. 06 01 V02 14 57.50 -lo 1 3.28X 57.30 -1.0 3. 16X 0 1 VO 224 58. • 6 .53 58.00 . 2 1. 54 01 V0233 59©5 0 2.3 1.06 60. 00 3. 6 1. 14 0 1 V0235 57 o 25 - 1 o 5 . 62 56. 50 -2. 4 e 72 01 VO 2 43 56© 00 -3. 7 .00 55.50 -4.2 . 00 0 1

VO 244 55.50 -4.5 1.29 55.00 -5.0 1. 47 01

58. 14 - GR. MEAN • 57. 90 5 TEST DETERMINATIONS

1.94 • SD MEANS 1. 63 31 LABORATORIES IN GRAND MEANS

.42 - AVER SDR - .44 31 LABORATORIES REPORTING

IRHD - UNIT IRHD

14
MATERIAL

D83-D84

HARDNESS

MATERIAL D81-D82 58-14 I RHD MATERIAL D83-D84 57.90 I RHD

15

REPORT 3e - 4 INTERLABORATORY PROGRAM 0N EVALUATION OF RUBBER NOVEMBER 1970

MOONEY VISCOSITY

NOTES

Materials U81 and U82 were the same rubber. Similarly, materials

U83 and U84 were the same rubber. No sample preparation was required

for materials U81 and U82 whereas, mill massing was required for materials U83 and U84.

V106 results were obtained at NBS on the manually closed viscometer

used for determining the Mooney viscosities of the standard rubbers.

SUMMARY OF ANALYSES

LABS LABS STD DEVIATIONS

PROPERTY MATERIAL INCL OMIT GR0 MEAN LABS SBEETS BEPL UNITS

MOONEY U81-U82 43 2 6 8© 27 2o 07 O 13 • 36 ML ISCOSITY U83-U84 43 2 64 0 0 3 20 25 O 31 • 51 ML

PRECISION

PROPERTY MA TERIAL

REPL

CRP REPL

ASTM GR0 MEAN

MOONEY U81-U82 3 3 6 80 27 VISCOSITY U83-U84 3 3 64 0 03

OF METHODS ABSOLUTE PERCENT REPEAT REPR6D UNITS REPEAT REPROD

loOO So 73 ML 1.5 6.4

lo 41 6o 24 ML 2.2 9.7

17
REPORT 38-4

INTERLAB6RAT6RY PROGRAM ON EVALUATION OF RUBBER

MOONEY VISCOSITY - ML

< NOVEMBER 1978 MATERIAL U81-U82 MATERIAL U83-U84 BUTYL RUBBER SBR

LAB MEAN % REL MEAN % REL VAR CODE F ML DEV SDR ML DEV SDR CODE INSTRUMENT, UNIT, 0R OTHER VARIATI'

VO 068 64 0 50 -5©5 2.77X 6 50 50 2© 3 4© 57X 01 V0071 670 60 -loO .61 6 5© 1 5 1© 8 © 53 01

VO 072 70© 00 2© 5 4.23X 61© 00 -4© 7 1 © 97 01

VO 073 65© 50 -4© 1 . 80 62©50 -2© 4 1© 27 01 VO 077 6 8© 30 .0 • 42 63©30 -lo 1 © 36 Cl

VC 0 78 X 62© 15 -9©0 1.83 55© 10 - 1 1© 9 .©55 0 1 V0C79 69©60 1.9 ©53 62© 15 -2©9 1© 23 01 V00 80 69© 45 1 o 7 1 o 84 64©60 © 9 1© 14 01

VO 0 83 70© 00 2.5 .88 6 4© 6 5 1 ©0 © 68 0 1 VO 0 85 72.75 6© 6 • 50 67© 20 5© 0 © 66 01 VC09C 69© 00 lo 1 ©80 61© 25 -4© 3 lo 06 01 V0092 68© CO -O 4 1.60 69o 00 7©8 1© 14 01 VC095 66© 7

5

-2©2 1 o 20 63© 00 -1 f 6 ©49 01

VO IOC 68.85 o 3 o 29 62.75 -2© 0 e 65 01

VO 1 1

1

X 57 0 90 -15.2 .83 54© 85 - 1 4 0 3 © 95 0 1

VO 1 17 65 o 50 -4© 1 2.00 62© 50 -2© 4 2© 07 01

VO 122 66© 25 -3.0 .40 64© 00 -.0 © 57 0 1 VO 1 28 69©0C 1. 1 1.60 67©00 4© 6 ©57 0 1 V01 44 70. 00 2.5 .40 64©50 ©7 ©57 01

VO 146 67© 00 -1.9 © 80 65© 00 1© 5 © 00 01

VO 148 66© 5C - 2© 6 2©40X 60© 00 -6© 3 2© 64X 0 1 VO 149 67.95 -© 5 • 91 6

9

0 00 7© 8 1© 16 01

VO 150 * 73.55 7.7 1.43 63o 70 -o 5 2© 54X 0 1 VO 156 66©75 -2.2 1.09 64.75 1© 1 © 78 01

VO 166 67.50 - lo 1 . 80 65.50 2© 3 © 57 0 1

VO 169 67.80 -O 7 • 21 62.40 -2 o 5 © 25 01 VO 177 66© ot -2.9 3.97X 65.80 2.8 1© 27 01

VO 178 66o 95 -1.9 ©87 63©55 - o 7 © 55 0 1 VO 1 82 67© 25 -1© 5 1.38 64©50 ©7 1© 50 0 1 VO 1 9C 70 ©65 3©5 1.37 62©95 - 1 o 7 1© 71 0 1

VO 2 07 69o 40 1.6 .44 64© 25 ©3 © 84 01

VO 2 08 72. CO 5.5 . 80 66© 00 3© 1 © 57 Cl V02 1 1 67 o 00 -1.9 .40 62© 50 -2© 4 ©57 0 1 V02 13 70©50 3.3 ©80 6 5© 7 5 2©^ ©78 01 V02 14 66© 75 -2.2 2. 1 1 63© 00 - 1 o 6 © 26 01 V02 17 64.00 -6. 3 • CO 62©75 -2©0 © 28 01

VO 2 18 68.00 -.4 © 80 64© 00 -©0 © 85 01

VO 2 20 67.50 -lo l 1.83 59©45 -7© 1 ©51 01

VO 22 1 70. OC 2.5 • 69 65©7 3 2© 7 © 57 0 1 V0223 67© 75 -o 8 1.20 0 0) o o 1 o 5 © 98 01

VO 2 36 71.00 4.0 .80 66o 50 3©9 1 o 97 0 1 V0238 • 69© 00 lo 1 1 o 6 0 58© 50 -8©6 2© 12 01 V0244 67.00 - 1.9 3. SOX 61© 50 -3©9 2© 12 C 1 V0250 70.00 2.5 1 © 6 0 65© 00 1 © 5 2© 07 0 1 V0251 66©65 -2.4 1 o 2 1 66© 00 3© 1 1© 56 0 1 68.27 - GR © MEAN - 64. 03 3 TEST DETERMINATIONS

2. 07 - SD MEANS - 2© 2 5 43 LABORATORIES IN GRAND MEANS

. 36 - AVER SDR -

© 51 45 LABORATORIES REPORTING

ML - UNIT *L

18
MATERIAL

U83-U84

MOONEY VISCOSITY

MATERIAL U81-U82 68-27 ML MATERIAL U83-U84 64.03 ML

19

REPORT 38 5 INTERLABflRATeRY PROGRAM ON EVALUATION OF RUBBER DECEMBER 1976

VULCANIZATION CHARACTERISITCS USING OSCILLATING DISK CURE METER

NOTES Materials Z81 and Z82 were the same rubber formulation. Similarly

materials Z83 and Z84 were alike.

V100 results were obtained at NBS using a Model TM-100 Monsanto Rheometer with a disk oscillating at +1° amplitude and 1.7 hertz

One participant used a Monsanto Rheometer operated at 10° amplitude and 1.7 hertz frequency. All others used Monsanto

Rheometers operated at one degree amplitude and 1.7 hertz

frequency.

SUMMARY OF ANALYSES

LABS LABS STD DEVIATIONS

PROPERTY MATERIAL INCL OMIT GR 0 MEAN LABS SHEETS REPL UNITS

SCORCH Z81-Z82 36 3 4 0 4 4 « 25 o 03 © 08 MINUTES

TIME Z83-Z84 36 3 30 47 © 22 o 03 ©07 MINUTES

CURE TIME Z81-Z82 39 0 60 38 ©32 o 02 © 06 MINUTES

( 50% MH ) Z83-Z84 39 0 60 20 ©34 o 03 ©07 MINUTES

CURE TIME Z81-Z82 37 2 90 4 4 ©53 ,03 • 12 MINUTES

( 90% MH ) Ze3-Z84 37 2 1 lo 34 ©67 o 03 • 14 MINUTES

MINIMUM Z81 -Z82 36 3 4© 74 • 81 o 03 © 1 0 POUND-INCHES

TORQUE Z83-Z84 36 3 5© 62 © 85 . 03 © 08 POUND-INCHES

MINIMUM Z81-Z82 36 3 ©5350 • C 9 1

3

o 00 50 ©0112 NEWTON-METERS

TORQUE Z83-Z84 36 3 © 6350 ©0956 o 0047 © 0085 NEWTON-METERS

MAXIMUM Z81-Z82 36 3 22© 1 4 1© 21 o 04 ©11 POUND-INCHES

TORQUE Z83-Z84 36 3 25© 90 1© 20 o 05 O 09 POUND- INCHES MAXIMUM Z81-Z82 36 3 2© 501

1

© 1371 o 0047 c 0123 NEWTON-METERS

TORQUE Z83-Z84 36 3 2© 926 4 © 1355 . 0052 © 01 05 NEWTON-METERS

PROPERTY MATERIAL

REPL

CRP

REPL ASTM

PRECISION OF

GR© MEAN

METHODS ABSOLUTE

REPEAT REPROD UNITS PERCENT REPEAT REPROD

SCORCH Z81-Z82 3 3 4o 44 o 22 © 68 MINUTE 4.9 15.3 TIME Z83-Z84 3 3 3©47 ,18 ©62 MINUTE 5.2 17.8

CURE TIME Z81-Z82 3 3 6©38 . 17 © 89 MINUTE 2.6 14.

C

( 50% MH

)

Ze3-Z84 3 3 6© 20 0 21 o 94 MINUTE 3.3 15. 1

CURE TIME Z81-Z82 3 3 9© 44 ,32 1© 47 MINUTE 3.4 15.6

( 90% MH

)

Z63-Z84 3 3 1 1© 34 ,39 1© 85 MINUTE 3.4 16.3

MINIMUM Z81-Z82 3 3 4o 7 4 • 27 2© 24 LB-IN© 5,8 47.3

TORQUE Z83-Z84 3 3 5© 62 .21 2© 34 LB-IN© 3.7 41.7 MINIMUM Z81-Z82 3 3 ©535 0 .0309 © 2530 N-M 5. 8 47.3 TORQUE Ze3-Z84 3 3 ©6350 o 0235 © 2649 N-M 3.7 41.7

MAXIMUM Z81-Z82 3 3 2 2© 14 ,30 3© 36 LB-IN© 1.4 15.2 TORQUE Z83-Z84 3 3 25© 90 o 26 3© 32 LB-IN© 1.0 12.8 MAXIMUM Z81-Z82 3 3 2© 501 1 .0342 © 3^98 N-M 1.4 15.2 TORQUE Z83-Z84 3 3 2© 9264 .0290 © 37 55 N-M 1.0 12.8

21
INTERLAB6RAT 6RY PROGRAM ON EVALUATION OF RUBBER

REPORT 38 - 5 SCORCH TIME - MINUTES

MATERIAL Z8 1 - Z82 MATERIAL Z83 -Z84 COMMERCIAL TIRE TREAD SBR

LAB MEAN % REL MEAN % REL VAR CODE F MINUTE DEV SDR MINUTE DEV SDR C0DE

VO 07 1 4.40 -o 9 o 64 3o 50 08 1. 33 0 1 V0074A 4e 70 5.9 .74 3.58 3 0 3 c 84 0 1 V0074B 40 67 5.3 1.41 3o 4 8 c 4 o 97 u 1 VO 077 4« 74 6e 8 1.68 3 0 6 5 5.2 1.11 01 V0078 4© 47 . 8 2.61X 30 52 1 o 6 1 o 67 01

V0C79 4 0 75 7. 0 .55 3.37 oOO 01 V0063 4 o 70 5.9 2.02 3.60 3c7 C 89 0 1 VO 0 85 4c 45 .2 o 0 0 3e 42 • 1 o 3 C 00 01

VO 0 86 4© 55 2.5 1.38 3c 70 6 0 6 C 00 01 V0090 4c 62 4.2 .77 3o 69 6 o 3 o 69 0 1 V0C92 4 e 32 -2.6 .55 30 32 •4 o 2 o 44 01 V0095 X 4.55 2.5 .00 4.30 230 9 oOO 0 1 V01 00 4 0 45 .2 .64 3c 60 3o7 o 77 0 1 V01 17 4o 25 -4.3 1 e 34 3o 10 - 1 0.7 1.21 01 VO 1 2 0 4o 1 1 -7.3 2. 17 30 4

1

-lo 8 lo 02 01

VO 122 4c 14 - 6 . 8 .41 3o 19 -So 1 O 58 01

VO 128 X 4 0 20 -5.4 .37 5c 15 48© 4 o 44 0 1 VO 144 4 e 35 - 2.0 .29 3o 50 o 8 . 58 0 1 VO 1 46 4 o 90 10.4 1.84 3.70 6.6 1 o 65 01

VO 148 4 0 50 1.4 .44 3o 50 o 8 o 31 01

VO 149 4 0 45 .2 loll 3o 4 5 - o 6 lo 33 01

VO 150 4e55 2.5 1 o 70 3 0 6

5

10.9 1.65 01 V01 52 4 0 60 3.6 .00 30 70 6 0 6 o 00 01

VO 156 4© 52 1.9 o 55 30 57 3 C 0 o 44 01

V01 58 40 15 -6.5 o 32 3o 27 -5.6 o 22 01

DECEMBER 1978

CODE INSTRUMENT, UNIT, OR OTHER VARIATION

VO 161 VO 166

VO 169

- 2.0

- 3.2

-7o7

o 37

1.28

1.48

3.30 3.40

30 75

•4 o 9

- 2.0

8 0 C

, 33

, 44

, 33

01

0 1 01

VO 178 4e 00 -9.9 1.71 3o 10 -10.7 1 . 21 01 V02C7 X 4 o 60 3.6 1.01 4 0 25 22.4 1 . 21 01

VO 208 4. 78 7.7 .63 3C 81 So 8 o 90 0 1 V02 1 1 4. 25 -4© 3 .37 3 0 22 -7 C 1 1 . 55 01 V0213 4.25 -4.3 2.58X 30 1 0 -1 0.7 . 89 0 1 V0214 4. 80 e . 1 • 74 3.6 5 5.2 1.21 01 V0217 4© 60 3 0 6 .00 3.75 8.0 . 00 0 1

VO 2 1

8

4.60 3 0 6 • 74 3.55 2.3 . 00 01 V0220 4.00 -9 0 9 1.70 20 95 - 15.0 1. 33 01 V0238 4.00 -9.9 .92 30 ? 5 -6.4 1. 45 01 V0243 4c 44 oO .52 7, 4 1 - 1.8 o 64 0 1

4. 44 • GR. MEAN • . c 47 3

o 25 • SD MEANS •

o 22 36

. 08 - AVER SDR -o 07 39 MINUTE - UNIT MINUTE

TEST DETERMINATIONS

22
MATER

I

RL

Z83-Z84

SC0RCH TIME

MATERIAL Z81-Z82 4.44 MINUTE MATERIAL Z83-Z84 3.47 MINUTE

23
REPORT 38-5

INTERLABeRATSRY PROGRAM ON EVALUATION OF RUBBER

CURE TIME (50* MH ) - MINUTES DECEMBER 1978 MATERIAL Z81-Z82 MATERIAL Z83-Z84 COMMERCIAL TIRE TREAD SBR

LAB MEAN « REL MEAN % CODE F MINUTE DEV SDR MINUTE DEV

VO 07

1

6« 30 -1.3 • 96 6.25 e 7 V0074A 6. 85 7.3 1.42 6.62 6.7 V0074B 6o 73 5.5 2.82X 6.4 0 3. 1 VO 07^ 6 e 79 6.5 1.66 6.63 6.9

VO 078 6 e 32 -.9 3.49X 6.2 0 -o 1

VO 0 79 « 5 o 85 -8, 3 .48 6. 05 -2.5

VO 083 6« 80 6.5 2.14 6.60 6.4

VO 0 85 6o 50 1.8 .83 6.20 *o 1 V0086 6 0 80 6.5 3 o 16X 6. 85 1 0.4 V0090 60 6 i 3.6 .73 6.42 3.5

VC 092 6 o 15 -3.6 • 72 5.87 -5.3 V0095 6.80 6. 5 .00 6.55 5.6

V01 00 6. 25 2. 1 o 96 6.25 .7 V01 17 6 0 25 -2. 1 1.66 6. 10 -1.7

VO 1 2 0 5 0 98 -6.2 3.06X 5. 88 -5.2

VO 122 6.22 -2.5 1.27 6. 03 -2.8

VO 128 6.20 -2.9 .83 6. 10 - 1 o 7 VO 144 6.33 -.8 . 48 6. 04 -2.7

VO 146 6.70 5. 0 1.31 6.50 4. 8 VO 1 48 6.32 -1.0 .79 6. 42 3.5

VO 149 6. 37 -• 1 .88 6. 15 -o 9 VO 150 6.40 . 3 1 o 44 6.30 1.5

VO 152 6. 60 3. 4 .96 6. 40 3. 1 VO 1 56 6.52 2.2 .48 6. 3 0 1.5

V01 58 5.97 -6.4 .48 5.72 -7.7

VO 161 6.20 -2.9 • 96 5. 80 -6.5

VO 166 6.20 -2.9 .48 6. 00 -3.3

VO 169 6.00 -6. 0 1.75 5. 85 -5.7

VO 1 78 5.65 -1 1.5 2. 7 1

X

5.45 -12.2

VO 207 e 6. 80 6.5 3.05X 6.95 12.0 V0208 6.39 o 1 • 70 6. 1 9 -. 2 VC2 1 l 6. 30 -1.3 • 48 6. 00 -3.3

VO 2 13 6. 80 6. 5 • 72 6.45 4.0

V02 14 6.85 7.3 1.44 6.4 0 3. 1 V02 17 6.55 2.6 .48 6. 45 4. 0

VO 2 18 6.55 2.6 • 96 6.35 2.3 V0220 5.90 -7.6 1.31 5.4 5 -12.2 V0238 5.87 -8. 0 1.83 5.81 — 6.4

V0243 6. 20 -2.9 .38 5.98 -3.6

6.38 - GR . MEAN • 6. 20 .32 - 3D MEANS -

. 34

. 06 • AVER SDR •

. 07 MINUTE • UNIT MINUTE

REL VAR

SDR CODE INSTRUMENT. UNIT, OR OTHER VARIATION

1. 16 01 .62 0 1 1 o 25 0 1 .61 01 1.40 01

.00 0 1 1.06 01 1.16 01 1.69 01 .57 0 1 .19 01 .00 01 .77 0 1 1,06 01 1.48 01 1.34 01 .00 01 .30 01

1. 16 01 2.66X 01

1.06 01 1.55 01

o 39 01

. 72 0 1 .58 01

1. 16 0 1 .39 01 .39 01 1.41 01 1.69 01 .12 0 1 1.41 01 2.07 01

2. 16 0 1 .39 01 .00 01 .77 01 1.43 01 .49 Cl

3 TEST DETERMINATIONS

39 LABORATORIES IN GRAND MEANS

39 LABORATORIES REPORTING
MATERIAL

Z83-Z84

CURE TIME (50°/ MH ) MATERIAL Z81-Z82 6-38 MINUTE MATERIAL Z83-Z84 6.20 MINUTE

25
INTERLAB0RAT0RY PROGRAM ON EVALUATION OF RUBBER

REPORT 38 - 5 CORE TIME ( 90* MH) - MINUTES MATERIAL Z8

1

-Z82 MATERIAL Z83- Z84 COMMERCIAL TIRE TREAD SBR

LAB MEAN * REL MEAN % REL VAR CODE F MINUTE DEV SDR MINUTE DEV SDR C0DE

VO 07

1

9 o 50 .6 1.03 1 1 o 6 0 2© 3 © 82 01

VO 074

A

10.35 9.6 .76 l 2© 4 4 9©7 1© 20 01 V0074B 10o 12 7.2 2.20X 12© 00 5© 8 o 37 01 V0077 9. 88 4.6 .92 12© 15 7 © 2 o 78 0 1 V007e 9o 25 -2.0 1.15 I 1© 25 -08 © 80 01

V0079 X 8.70 -7.9 .12 l 1©97 5©6 ©00 0 1 VO 0 83 1C . 05 6.4 1.57 1 20 5 0 1 0© 2 1© 03 01 V0085 9.50 .6 .43 1 0© 85 -4©3 o 62 0 1 V0086 9.75 3.3 .75 1 1 o 50 1 o 4 1 o 6 0 01 V0090 9© 8 1 3. 9 1.97 1 l o 76 3© 8 1© 19 0 1

V0C92 9©00 -4.7 .00 1

0

o 72 -5© 4 © 18 0 1 V0C95 X 1 1.45 21.3 .00 1 1© 15 • 1 o 7 ©00 01

VO ICO 9© 50 .6 .63 1 1 © 55 1 o 9 o 90 01

V01 17 9© 15 -3. 1 2. 16 1 1. 40 o 5 c7l 0 1 VO 1 20 8© 85 -6. 3 2.16 1 1© 05 -2©5 1© 16 0 1

VO 122 9© 62 1.9 1.71 1 1© 82 4© 3 1© 83 0 1 V01 28 9© 10 -3.6 .75 1 1© 10 -2© 1 © 00 Cl

V01 44 9© 1 8 -2.7 .43 1 0© 96 • 3© 3 i© ez 01

V01 46 9©85 4.3 1.25 1 1© 50 1 o 4 1© 36 01 VO 1 48 9.42 -.2 .78 1 1© 34 o 1 © 98 01

VO 1 49 9.60 1.7 1.08 1 1 o 30 • o 3 ©82 01

VO 150 9© 15 -3. 1 .50 1 1© 00 -3©0 2© 18 C 1 VO 152 9© 7C 2.7 .50 1 1 o 70 3© 2 c 21 01 V01 56 9©70 2.7 .34 1 1© 50 1 o 4 © 54 01

V01 58 8©52 -9.7 .00 10© 25 -9©6 1© 08 0 1

VO 161 e© so -6. 8 .50 1 Oo 4 5 •7 o 8 © 90 01

VO 166 8.95 -5. 2 .25 10.85 -4©3 . 56 01

VO 169 8© 85 -6.3 1.16 1 0 o 85 -4©3 o 90 0 1 VO 178 8 o 30 -12. 1 1.90 9©75 - 14©0 o 41 01 V0207 » 1 loOO 16.5 1.73 13.25 16.9 1© 60 01 V0208 9©48 . 4 .66 1 1 o 3 9 o5 3© 75X 01 V02 1 1 9© 27 -1.8 1.12 1 1. 00 -3©0 1© 34 01 V0213 9.75 3.3 .75 1 1.35 o 1 l© 27 01 V0214 10.15 7.5 1.40 12© 05 6.3 1© 63 01 V02 17 9. 50 .6 .00 1 1© 50 1 o 4 ©62 0 1 V02 18 9.60 1.7 .50 1 1 o 6 0 2.3 o 4 1 0 1 V0220 8o 90 -5.7 .68 1 0 o 35 -8©7 1© 09 01 V0238 9.00 -4.7 1. 25 10© 87 -4.1 2© 43X 0 1 V0243 9© 23 -2.2 .16 1 1© 01 -2© 9 .68 Cl 9©44 • GR „ MEAN • 1 1 o 34

©53 - SD MEANS - ©67

© 12 • AVER SDR •

© 14 MINUTE • UNIT MINUTE

DECEMBER 1978

CODE INSTRUMENT, UNIT, OR OTHER VARIATION

3 TEST DETERMINATIONS

37 LABORATORIES IN GRAND MEANS

39 LABORATORIES REPORTING

26
MATERIAL

Z83-Z84

CURE TIME (907. MH ) MATERIAL Z81-Z82 9.44 MINUTE MATERIAL Z83-Z84 11.34 MINUTE

27
REPORT 38 5 INTERLABORATORY PROGRAM ON EVALUATION OF RUBBER

MINIMUM TORQUE - POUND-INCHES DECEMBER 1978 MATERIAL Z81-Z82 MATERIAL Z83-Z84 COMMERCIAL TIRE TREAD SBR

LAB MEAN MEAN % REL MEAN MEAN % REL VAR CODE F LB-INe N-M DEV SDR LB- IN© N-M DEV SDR CODE INSTRUMENT, UNIT, OR OTHER VARIATION

VO 07

1

4©20 ©4746 -l 1 o 3 • 80 5© 05 © 5706 -10© 1 • 77 01 V0074A 4. 30 ©4859 -9© 2 1.41 5 ©37 ©6073 -4© 4 o 89 01 V0074B 4©20 .4746 -l 1 o 3 1.32 5.07 ©5734 -9© 7 .38 0 1 VO 077 4 o 07 © 4604 - 1 3 0 9 • 25 5 o 00 ©5649 -1 1© 0 © 51 01 V0078 4 0 25 .4802 -10© 2 1©07 5© 10 .5762 -9© 3 .77 0 1 V0079 X 3 0 10 ©350 3 -34© 5 .68 5©00 © 5649 - 1 lo 0 © 00 01 VO 0 83 5o 80 .6553 22© 5 ©58 6© 65 ©7514 16© 3 1© 33 0 1 V0085 3o 89 © 4400 -17© 8 ©00 4© 74 © 5350 - 1

5

0 7 ©00 40 ORIGINAL IN NEWTON-METER

VO 0 86 4 e 30 ©4e59 -9.2 U 17 5© 00 • 5649 -1 1©0 ©38 0 1 V00 90 4© 77 .5395 o 8 1.70 5.47 ©6186 -2© 6 3. 17X 01

VOC 92 4© 45 ©5028 -6 o 0 .00 5© 25 © 5932 -6© 6 .77 0 1 V0095 X 6.20 .7005 30© 9 ©00 5©70 ©6440 1© 4 ©00 0 1 VOI 00 4© 40 .4972 -7© 1 .58 5.20 © 5875 -7© 5 ©00 0 1 V01 17 4© 9 0 © 5537 3© 5 1© 83 50 75 © 6497 2©3 1 © 68 01 VOI 20 5© 0 0 .5649 5©6 1 • 0 1 6© 20 ©7005 10© 3 2.05 01

VOI 22 5© 0

0

.5649 5© 6 2. 18X 5©60 .6327 -o 4 3© 1 5X 01 VOI 28 4© 25 . 4602 -1 0© 2 ©00 5© 15 © 5819 — 8© 4 ©38 01 VOI 44 4 © 00 .4520 -15© 5 ©00 4©90 .5537 -12© 8 © 38 01

VOI 46 4© 95 . 5593 4© 5 1 © 09 5o 80 . 6553 3© 2 2© 30 01 VOI 48 5©80 .6553 22© 5 1 © 90 6© 72 ©7599 19©7 1© 34 0 1

VO 1 49 4© 50 .5085 -5©0 .58 5.55 ©6 27 1 - 1© 2 lo 43 01

VO 150 * 6©75 ©7627 42© 6 3.99X 8© 00 .9039 42© 3 .00 0 1 VO 1 52 4 © 20 .4746 -1 l© 3 .00 5.00 .5649 -1 1© 0 ©00 0 1 V0 1 56 4. 70 ©531 l “ o 7 .51 5.35 ©6045 -4© 8 1© 15 01

VO 158 4.00 .4520 -15© 5 ©00 5.07 © 5734 -9©7 1. 83 0 1

VO 161 4.00 .4520 - 1 5© 5 © 80 4.90 ©5537 -12© 8 .77 01 VO 166 4© 20 .4746 -l 1 o 3 ©00 5©20 © 5875 -7© 5 ©00 01

VO 169 4. 34 © 49C 0 -8© 4 1.34 5.00 ©5650 -1 loO ©34 40 ORIGINAL IN NEWTON-METER

VO 178 4© 50 .5085 - 5o 0 1.55 5 0 65 ©6384 O 5 .38 0 1 V0207 X 8© 30 .9378 75© 3 3.05X 8© 75 ©9887 55© 7 2©78X 01 V0208 4© 28 . 4836 -9©6 ©56 5© 2 1 © 5887 -7© 3 • 69 01

VO 211 4 0 4 5 . 5028 -6 o 0 .53 5.37 ©6073 -4©4 1.26 0 1 V0213 5.25 ©5932 10© 9 . 68 5.90 .6666 5o 0 .77 C 1 V0214 6 © 7 0 ©7570 41© 5 1© 56 7©60 ©8587 35© 2 .77 01 V02 17 4© 20 . 4746 -1 l© 3 ©00 5. 20 © 5875 -7© 5 .00 01

VC 218 4© 90 .5537 3© 5 ©58 5.65 ©6384 o5 1 o 54 0 1 V0220 4© 7 5 © 5367 o 3 ©80 5.70 © 6440 1 ©4 1. 15 01 V0238 « 7© 25 .8192 53© 1 2.73X 8.25 © 9322 46© 8 3©50X 0 1 V02 43 4.95 . 5593 4©5 ©58 5.67 ©6412 1 © 0 ©96 0 1

4 0 74 .5350 • GR © MEAN • 5.62 ©6350 3 TEST DETERMINATIONS

© 81 . 0913 SD MEANS • . 85 © 0956 36 LABORATORIES IN GRAND MEANS

© 10 • 01 12 • AVER SDR - ©08 © 0085 39 LABORATORIES REPORTING

LB-IN© N-M • UNIT LB-IN© N-M

28
MATER

I

AL

Z83-Z84

MINIMUM T0RQUE

MATERIAL Z81-Z82 4.74 LB-IN. MATERIAL Z83-Z84 5-62 LB-IN.

29
REPORT 38 5 DECEMBER 1978 INTERLAB6RAT0RY PROGRAM ON EVALUATION OF RUBBER MAXIMUM TORQUE - POUND-INCHES MATERIAL Z81-Z82 MATERIAL Z83-Z84 COMMERCIAL TIRE TREAD SBR LAB MEAN MEAN % REL MEAN MEAN % REL VAR CODE F LB- IN. N-M DEV SDR LB- IN. N-M DEV SDR CODE INSTRUMENT, UNIT, SR STHER V, V0071 2 1 o 60 2. 4406 -2.4 1.32 25.00 2.8248 -3.5 .62 0 J VC074A 22,o 22 2.5112 o 4 1.49 26. 25 2.9660 1 o 4 2. 86 X 0 1 V0074B 22 c 20 2. 5084 ©3 1.00 25.97 2.9349 ©3 . 16 01 VO 077 2 1 o 10 2.3841 -4.7 .48 25.02 2. 8276 -3.4 o 74 0 1 VO 078 21o 55 2. 4349 -2.6 1.22 25.30 2. 8586 -2.3 . 85 01

VO 0 79 X 16. 20 1.8304 -26. 8 1.59 25.05 2. 8304 -3.3 .00 0 1 V00 83 23 o e0 2.6892 7. 5 .53 28.00 3. 1637 8. 1 1. 87 01 VO 0 85 1

9

e 87 2.2451 -10. 2 o 4 1 23. 41 2.6451 -9.6 1. 10 40 ORIGINAL IN NEWTSN-METER

VO 0 86 20.60 2.3502 -6. 0 ©79 24. 15 2.7287 -6. 8 .82 0 1 V00 90 22. 37 2. 5282 lo 1 © 23 25.47 2. 8784 -1.6 3.66X 0 1

VC 0 92 22. 80 2.576 2 3.0 • 26 26.30 2.9716 1.5 .00 0 1 VO 0 95 X 22c 80 2.5762 3.0 .00 22.30 2.5197 -13. 9 .00 0 1 VO 100 22.00 2.4858 -o 6 .00 26. 15 2.9547 1.

0

.00 C 1 VC 1 17 « 21. 80 2.4632 - 1. 5 7.39X 26.85 3.C338 3.7 2. SOX 01

VO 12C 23.60 2.6666 6. 6 2© 10 27.35 3.0903 5. 6 1. 56 01

VO 122 23. 10 2.6101 4.

4

2. 17 26.50 2.9942 2.3 6. 58X 01

VOl 28 20. 45 2. 3106 -7. 6 1.32 24. 25 2. 7400 -6.4 .93 01

VO 1 44 21.00 2.3728 -5. 1 .26 24. 80 2. 8022 -4.2 2.69X 0 1 VO l 46 22.0 0 2. 4ese -© 6 1.06 25.50 2.8812 -1.5 1.65 01 VOl 48 24.22 2.7372 9. 4 l. 27 27. 50 3. 1 072 6.2 2. 18 0 1

VO 149 21.70 2.4519 -2. 0 1.94 25.50 2.8812 -1. 5 1.36 0 1 V015C * 24. 50 2.7683 10.7 3.96X 29.00 3.2767 12. 0 .00 0 1 VO 152 21.45 2. 4236 -3. 1 .53 25.50 2.8812 -1.5 .31 01

VC 156 21.60 2.4406 -2.4 1.06 24.55 2.7739 -5. 2 • 31 C 1 VC 158 21. 15 2.3897 -4. 5 1.06 25.07 2. 8332 -3. 2 1.63 0 1

VO 161 20.45 P. 3106 -7.6 .96 24.60 2. 7796 -5. 0 1.24 01 VO 166 21. 15 2. 3897 -4.5 • 46 25.55 2. 8869 - 1© 4 • 54 C 1 VC 169 21.11 2. 365 1 -4.6 2.47X 24.65 2.7851 -4. 8 • 83 40 ORIGINAL IN NEWTON-METER

VO 178 21. 15 2. 3897 -4.5 1.49 25.25 2. 8530 -2.5 1. 13 0 1 VO 207 X 27. 85 3. 1468 25. 8 2.55X 31.00 3. 5027 19.7 1.66 01 V0208 23. CO 2. 5988 3. 9 3.C9X 26.63 3. 0089 2. 8 5. 38X 01 V02 1 1 22.67 2. 5620 2.4 1.0 1 26. 60 3. 0055 2.7 1. 36 01 V02 13 23.35 2. 6383 5.5 1.32 27. 25 3. 0790 5. 2 1. 56 C 1 VO2 14 24. 15 2. 7287 9. 1 .96 27.25 3. 0790 5.2 .62 0 1 V02 17 21. 20 2.3954 -4. 2 1.06 25.00 2. 8248 -3.5 .00 01 V0218 22c 50 2. 5423 1.6 .53 26.50 2.9942 2. 3 1. 24 0 1 V0220 22.50 2. 5423 1.6 ©92 26.45 2.9886 2. 1 ©31 0 1 V0238 o 24.75 2. 7965 1 1. 8 3.87X 27. 25 3. 0790 5.2 .78 01 V0243 22.00 2. 4858 -o 6 ©79 26. 00 2.9377 o 4 • 31 01

22. 14 2. 501 1 • GR. MEAN - 25. 90 2.9264 3 TEST DETERMINATIONS

1.21 . 1371 • SD MEANS - 1. 20 . 1355 36 LABORAT0FIES IN GRAND MEANS

o 1 1 .0123 - AVER SDR .09 .0105 39 LABORATORIES REPORTING

LB-IN. N-M - UNIT LB-IN. N-M

30
MATERIAL

Z83-Z84

MAXIMUM T0RQUE

MATERIAL Z81-Z82 22.14 LB-IN. MATERIAL Z83-Z84 25.90 LB-IN.

31
NBS-114A (REV. 9-78)

U.S. DEPT. OF COMM. BIBLIOGRAPHIC DATA

SHEET

1. PUBLICATION OR REPORT NO. RUBBER CRP 38

No.

4. TITLE AND SUBTITLE

INTERLABORATORY PROGRAMS FOR RUBBER

Analyses No. 38

October - December 1978

3. Recipients Accession No.

5. Publication Date June 5, 1979

ization Code

7. AUTHOR(S)

J. Horlick, G. W. Bullman, T. L. Cummings

8. Performing Organ. Report No. NBSIR 79-1373

9. PERFORMING ORGANIZATION NAME AND ADDRESS Id. Project/Task/Work Unit No.

NATIONAL BUREAU OF STANDARDS

DEPARTMENT OF COMMERCE

WASHINGTON, DC 20234

7825578

.11. Contract/Grant No.

12. SPONSORING ORGANIZATION NAME AND COMPLETE ADDRESS fStreer, City. State, ZIP) Collaborative Testing Services, Inc., 9241 Wood Glade Drive,

Great Falls, VA 22066

13. Type of Report & Period Covered final

14. Sponsoring Agency Code

15. SUPPLEMENTARY NOTES

[ | Document describes a computer program; SF-185, FIPS Software Summary, is attached.

16. ABSTRACT (A 200-word or less factual summary of most significant information. If document includes a significant bibliography or

literature survey, mention it here.)

Collaborative Reference Programs provide participating laboratories with the means for checking periodically the level and uniformity of their testing

in comparison with that of other participating laboratories. An important

by-product of the programs is the provision of realistic pictures of the state

of the testing art. This is one of the periodic reports showing averages

for each participant, within and between laboratory variability, and other

information for participants and standards committees.

17. KEY WORDS (six to twelve entries; alphabetical order; capitalize only the first letter of the first key word unless a proper name;

separated by semicolons)

18. AVAILABILITY | 1 Unlimited

pC^For Official Distribution. Do Not Release to NTIS

j Order From Sup. of Doc., U.S. Government Printing Office, Washington, DC

20402, SD Stock No. SN003-003-

Order From National Technical Information Service (NTIS), Springfield, VA. 22161

19. SECURITY CLASS

(THIS REPORT)

UNCLASSIFIED

20. SECURITY CLASS

(THIS PAGE)

UNCLASSIFIED

21. NO. OF

PRINTED PAGES

36

22. Price

USCOMM-DC