Hfel/t. 78-1527

INTERLABORATORY PROGRAMS

FOR RUBBER

ANALYSES NO. 34

OCTOBER DECEMBER 1977

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

Smoothness

Surface pick strength

K & N ink absorption

pH

Opacity

Blue reflectance (brightness)

Specular gloss, 75°

Thickness

Concora (flat crush)

Ring crush

FKBG-API Containerboard (48 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)

tet

saa9

Collaborative Reference Programs

B360 Polymer Building

National Bureau of Standards

Washington, D.C. 20234
INTERLABORATORY PROGRAMS

FOR RUBBER

Analyses No. 34

October - December 1 977

E. B. Randall, Jr., J. Horlick

Standards Application and Analysis Division

Institute for Applied Technology

J. F. Stevenson, Research Associate, SAAD, IAT

Collaborative Testing Services, Inc.

G. W. Bullman

Polymers Division

Institute for Materials Research

U. S. DEPARTMENT OF COMMERCE

National Bureau of Standards

NBSIR 78-1327

INTRODUCTION

This report summarizes the test results for the fourth quarter of 1977.

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 Edwin B. Randall, Jr., Jeffrey Horlick, or Jeffrey Stevenson, (301) 921-2946.

Edwin B. Randall, Jr., Administrator

NBS Collaborative Reference Programs

Laboratory Evaluation Technology Section

January 13, 1978

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.

A - 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 CRP 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
I NTE RL A E e R A TOR Y PROGRAM ON EVALUATION OF RUBBER

REPORT 34-1 OCTOBER 1977

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

NOTES

Materials D71 and D72 were sheets of the same vulcanized rubber. Similarly, materials D73 and D74 were alike.

V100 results were obtained at NBS using a pendulum tester, V200 results were obtained at NBS using an electronic tester.

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

V126 used Die 2 in BS903

V148, V208 did not specify a Die V225 used ASTM Die D

Electronic testers were used by 39 (64%) of the 61 participants;

pendulum testers were used by 22 participants. Elongation measurements were made by automatic devices by 21 (34%) participants and manually by the rest. There were 9 (15%) reported relative humidities

above 55% and 16 (26%) reported relative humidities below 45%.

SUMMARY OF ANALYSES

LABS LABS STE DEVIATIONS

PROPERTY MATERIAL INCL OMIT GR. MEAN LABS SHEETS REPL UNITS

TENSILE D71-D72 60 1 2706. 106. 41 . 66. POUNDS PER SQUARE INCH STRENGTB D73-D74 60 1 2724. 132. 67. 62. POUNDS PER SQUARE INCH TENSILE D7 1-D72 60 1 18.66 .73 .26 . 46 MEGAPASCALS

STRENGTB D73-D74 60 1 18.79 .91 .46 .43 MEGAPASCALS

ULTIMATE D7 1-D72 59 2 672. 20. 9. 16. PERCENT

ELONGATieN D73-D74 £9 2 678 . 22. 7. 14. PERCENT

STRESS AT D71 -D72 60 1 983. 47. 17. 23. POUNDS PER SQUARE INCH 300* ELONGATION D73-D74 60 1 977. 52. 18. 23. POUNDS PER SQUARE INCH STRESS AT E71 -D72 60 1 6.779 .322 .121 .155 MEGAPASCALS

300* ELONGATION D73-B74 60 1 6.738 .357 .127 .158 MEGAPASCALS

PRECISION OF METHODS

REEL REPL ABSOLUTE PERCENT

PROPERTY MATERIAL CMP ASTM GR . MEAN REPEAT REPROD UNITS REPEAT REPROD TENSILE D71 -D72 5 5 2706. 183. 294. PSI 6.8 10.9 STRENGTH D73-D74 c 5 2724. 171. 365. PS I 6.3 13.4 TENSILE D71-D72 5 5 18.66 1 .27 2.03 MEGAPA 6.8 10.9

STRENGTB E73-D74 5 5 18.79 1.18 2.52 MEGAPA 6.3 13.4

ULTIMATE D71-D72 5

c 672. 45 . 54. « 6.7 8.0 ELONGATION D73-D74 5 5 678. 40. 62. « 5.9 9.2

STRESS AT E71-D72 5 5 983. 62. 129. PSI 6.4 13.2

300* ELONGATION D73-D74 5 5 977. 63. 143. PSI 6.5 14.7

STRESS AT D71-D72 5 c 6.779 .431 .892 MEGAPA 6.4 13.2

300* ELONGATION D73-D74 5 5 6.738 .437 .988 MEGAPA 6.5 14.7

5
I NTERLABORAT0RY PROGRAM ON EVALUATION OF RUBBER

REPORT 34-1 TENSILE STRENGTH - POUNDS PER SQUARE INCH OCTOBER 1977

MATERIAL D71 -D72 MATERIAL E73-D74

COMMERCIAL TIRE TREAD COMMERCIAL TIRE TREAD

LAB MEAN MEAN * EEL MEAN MEAN * REL VAR CODE F PSI MEGAPA DEV SDR PSI MEGAPA DEV SDR C6DE INSTRUMENT. UNIT. eR OThER VARIATION

VO 075 » 2434. 16.79 -10.0 .71 2385. 16.45 -12.4 1 . 04 01 V0076 2795. 19.28 3.3 1.38 281 0. 19.38 3.2 .79 01 V0078 2497. 17.22 -7.7 .55 2519. 1 7 . 38 -7.5 .70 01 VO 08

1

2725. 18.79 .7 1 .23 2725. 1 8.79 . 0 .74 01 V0083 2790. 19.24 3.1 .68 2800. 19.31 2.8 .87 01

VO 084 2620 . 18.07 -3.2 1 . 03 2660. 18.34 -2.3 1 .25 01

VO 085 2709. 18.68 . 1 .91 2653. 18.30 -2.6 .78 20 ORIGINAL IN MEGANERTONS PER SQ. METER

VO 087 2650. 18.28 -2.1 .93 2730. 18.83 .2 1 .48 01 VO 08 8 2462. 16.98 — 9 C .es 2431 . 16.77 -10.7 1.30 01 V0092 2830. 19.52 4.6 1 .00 2795. 19.28 2.6 1 .91 01

V0095 2770. 19.10 2.4 1.70 2792. 19.26 2.5 1 . 68 01 VO 096 2580. 17.79 -4.6 1 .02 2585. 17.83 -5. 1 .39 01 V0100 2735. 18.86 1 .1 1 .37 2740. 18.90 .6 1.50 01 V01 11 2680. 18.48 -.9 . 80 2650. 18.28 -2.7 1.36 01 V0117 2587. 17.84 -4.4 .36 2525. 17.41 -7.3 .66 01

V0122 2790. 19.24 3. 1 1.46 2825. 19.48 3.7 .61 01 V0123 2735. 18.86 1.1 .58 2725. 18.79 .0 .81 01 V01 26 2792. 19.25 3.2 1.11 2843. 19.61 4.4 .91 20 ORIGINAL IN MEGANERTONS PER SQ. METER

V0128 2715. 18.72 .3 .79 2705. 18.66 -.7 1.71 01 VO 141 * 3006 . 2 0.73 11.1 .99 3000. 20.69 10.1 1.51 01 V0144 2870 . 19.79 6.1 1 .01 2890. 19.93 6.1 1.11 01 V0144B 2665 . 18.38 -1.5 1.12 2745. 18.93 .8 1 .13 01 V01 46 2706. i e.67 .0 .68 2668. 18.40 -2. 0 1.15 01 V01 48 2875. 19.83 6.3 2.62X 2975. 20.52 9.2 1 . 23 01 V01 49 2755. 19.00 1 .8 .52 2792. 19.26 2.5 .92 01

V01 SO 2745 . 18.93 1.5 i .ce 2895. 19.97 6.3 .88 01 V0151 2510. 17.31 -7.2 .68 2450. 16.90 -10.1 .65 01 VO 1 52 2825. 19.48 4.4 1.47 2900. 20.00 6. 5 .69 01 V01 53 2581 . 17.80 -4.6 .85 2640. 18.21 -3.1 .73 01 V01 54 2575. 17.76 -4.8 .51 261 0. 18.00 -4.2 1.07 01

VO 156 277 0. 19.10 2.4 1.50 2830. 19.52 3.9 .68 01 V01 58 26 83. l e.50 -.8 1 .06 2719. 18.75 -.2 1.27 20 ORIGINAL IN MEGANEWTONS PER SQ. METER

V01 59 2615. 18.03 -3.3 1.51 26 60. 18.34 -2.3 .75 01 V01 60 2742. 18.91 1 .4 1 .53 2715. 18.72 -.3 1.47 01 VO 164 2735. 18.86 1.1 1.17 2797. 19.29 2.7 .57 01

V01 66 2800 . 19.31 3.5 .77 2718. 1 e .75 -.2 1 .20 01 V0168 2772. 19.12 2.5 1 .07 2881 . 19. e7 5.8 1 • 98X 01 V0169 2589. 17.85 -4.3 ,94 2502. 17.25 -8. 1 .55 20 ORIGINAL IN MEGANERTONS PER SQ. METER

V01 76 2655. 18.31 -1 .9 1 .26 2705. 18.66 -.7 .55 01 V0177 2755. 19.00 1.8 .67 2825. 19.48 3.7 .87 01

V01 78 2700 . 18.62 -.2 1.17 2700. 18.62 -.9 1 .22 01 V01 84 2720. 18.76 .5 1.06 2840. 19.59 4.3 1 .56 01 V0199 2683 . i e.sc -.8 1.24 2725. 18.79 . 0 .54 01 V0200 2724. 1 e.79 .7 1.32 2853. 19.68 4.8 .92 01 V0206 2505. 17.28 -7.4 .53 2465. 17.00 -9.5 .62 01

V02 07 2712 . 18.71 .3 .75 2725. 1 8.79 .0 .48 01 VO208 2799. 19.31 3.5 2 • 23X 2937. 20.26 7.8 1.13 20 ORIGINAL IN MEGANEWTONS PER SO. METER

V0220 2750. ie.97 1 .6 .88 2775. 19.14 1.9 .87 01 V0223 2700 . ie .62 -.2 1.83 2720. 18.76 -.1 .88 01 V0224 26C7. 17.98 -3.6 1.47 2557. 17.64 -6. 1 1 .67 01 V0225 2656 . 18.32 -1.8 .87 2656. 18.32 -2.5 .88 01

VO 2 32 2640 . 18.21 -2.4 .97 2710. 1 8.69 - .5 .98 01 VO 2 33 2757. 19.02 1.9 .98 2850. 19.66 4.6 1.18 01 V0235 26 67. 1 8 .40 -1.4 . 89 2656. 18.32 -2.5 1 . 38 01 V0238 2737. 18.88 1 .2 1.12 2837. 19.57 4.2 1.28 01 V0243 2734 . 18.86 1.0 .39 271 8. 1 e.74 -.2 .90 01 V0244 27 59. 19.03 2. 0 1 .22 2646. 18.25 -2.9 1 .30 21 ORIGINAL IN ZILOGRAMS/SQ. CENTIMETER

V0245A 2786. 19.21 3.0 .56 2794. 19.27 2.6 .52 01 V0245B 2695 . 18.59 -.4 .99 2681. 18.49 -1.6 .61 01 V0246 X 2552. 17.60 -5.7 1.57 2359. 16.27 -13.4 1.52 01 V0250 * 2e75 . 19. 83 6.3 .90 2762. 19.05 1 .4 .61 01 2706. 18.66 - GR . MEAN - 2724. 18.79 5 TEST DETERMINATIONS

106. .73 - SD MEANS • 132. .91 60 LABORATORIES IN GRAND MEANS

66. .46 - AVER SDR • 62. .43 61 LABORATORIES REPORTING

PSI MEGAPA • UNIT PSI MEGAPA

6
MATERIAL

D73-D74

TENSILE STRENGTH

MATERIAL D71-D72 2706. PSI MATERIAL 073-074 2724. PSI

MATERIAL D71-D72

7
RfcPCKT

LA. B COD H

voo^e

VO 0 7c

VO 07 6 VO 0 8 1 VC 0 83

VO C 84

VO 0 85

VO 087

VO 088

VO 0 9 2

VO 0 9 5 V0096

VOl 00 V011 1 VOl 17

VOl 22

VOl 23

VOl 26

VOl 28

VOl 41

VO 1 44 V0144B

VO 1 46

VOl 46

VOl 49

VOl 50

VO 1 5

1

VO 152

VOl 53

VOl 54

VOl 56

VO 1 58

VOl 59

VO 1 6 0 VOl 54

VOl 66

VOl 6 8 VOl 69

VOl 76

VO 1 77

VO 1 7 8 VOl 84

VO 1 9 9 VO 2 00 V0206

V0207

V0208

V02 20 V0223

V0224

V0225

V0232

VO 233

V0235

V0238

V0243

V0244 V0245A

V0245B

V0246

V02 50

I NTERL AB6R AT0RY PRGGRAH GN EVALUATION 6F RUBBER ULTIMATE ELeNGATieN1 - PFRCENT OCTOBER 1977

MATERIAL P7

1

-072 MATERIAL D73--D74 CGRNEKCIAL TIKE TRE AD COMMERCIAL TIRE TREAD

MEAN <k KEL MEAN % REL VAR

* DEV SDR * DEV SDR C0DE INSTRUMENT. UNIT, GR GTPES VAR 1 ATI SN

577. -14.1 .68 567 . -16.3 .66 01

6 75. .4 1.42 680. . 3 1.07 01 €55. -2.6 .72 €55. -3.4 .58 01 €40. -4.8 . 81 655 . -3.4 1 . 16 01

6 € 8 . 2.3 .72 688 . 1.4 1 . 30 01

655. -2.6 .70 €55. -3 .4 1 .24 01

7 CO . 4.

1

.55 720. 6.2 .83 01 €€7. - .7 1.12 672 . - .5 1.84 01 668. 2.3 1 .33 703. 3.6 .93 01 €60. -1.6 .28 650. -4.2 1.30 01

670. -.3 1.57 686 . 1 .4 1 . 86 01 650. 2.7 1.33 703. 3.6 . 69 01 €75. .4 1.28 675. -.5 1.30 01 715. 6 .4 .58 725 . 7. 5 1. 56 01

€ € 0 -1 .8 .14 655. -3.4 . 43 01

7C0. 4.1 1.76 715. 5.4 .82 01 €70. - .3 .43 655. -3.4 1.07 01 677. .8 1.25 692. 2.0 1 . 05 01 650. 2.6 .66 690. 1.7 1 . 21 01 €75. .4 .72 685. 1 .0 1.01 01

700. 4.1 1.17 685 . 1 .0 1 .15 01 680. 1.2 . 74 7 05 . 3.9 1 . 47 01 700. 4.1 1 .30 700. 3.2 1.73 01 €75. .4 2. 32X 682. .6 . 28 01 €47. -3.7 .70 66 0. -2.7 .65 01

685. 1 .5 1.17 710. 4.7 .56 01 650. 2.6 .55 670. -1.2 .58 01

€ 7 C . -.3 1.33 675. -.5 . 58 01 688. 2.3 . 85 6es. 1 .

4

.61 01 650. -3.3 .36 66 0. -2.7 .58 01 660. -1.8 1.47 €65 . -2.0 .68 01 €75. .4 1.22 695. 2.5 1 .56 01 €75. .4 1.56 670. -1.2 .83 01 €65. -1 .1 1.15 66 0. -2.7 1.84 01 €54. 2.2 1 .47 712. 5.1 . 84 01

€85. 1.5 .77 €65. -2 .0 1 .26 01 €60. -1.8 2.53X 680. .3 1 . 06 01 €40. -4. e .77 €35. -6 .4 . 77 01 680. 1 .2 1 .20 710. 4.7 . 86 01 €55. 3.4 . 53 705. 3.9 . 60 01 670. -.3 1 .50 680. .3 1 .49 01 68C. 1.2 1 .58X 680. .3 1 . 54 01 €85. 1 .5 1 .72 705. 3.9 . 79 01 €€5. -1.1 .73 690. 1.7 . 79 01

€ 15. -e .5 .44 €15. -9.3 . 31 01 €50. -3.3 .31 650. -4.2 .24 01 640. -4.8 2 • 0 1 X 66 0 . -2.7 1 . 09 01 667. -.7 .57 665. -2 .0 .76 01 670. -.3 1 .e4 675 . -.5 1 .00 01 €52. -2.5 1.73 667. -1 .6 1 .47 01 645. -4.0 1.15 652 . -3.8 .44 01 €75. .4 1 . 02 690. 1 .7 1 .35 01 €65. -1 .1 . 48 685. 1 .0 . 87 01 €35. -5.5 .65 640. -5.6 . 44 01 €62. -1 .4 .77 675. -.5 . 86 01 670. -.3 .36 €65. -2.0 .85 01 705. 4.5 1 .37 650. 1.7 1.18 01 €70. -.3 .87 680. .3 . 76 01 €75. .4 1.14 €65. -2.0 1 . 03 01 €€2 . -1 .4 .€4 600. -11.5 1.78 01 657. 3.8 .53 690. 1.7 . 70 01 672. - GR . MEAN - 678. 5 TEST DETERM INATIGNS

20. - SD MEANS - 22. 59 LABGRATGRIES IN GRAND MEANS

16. - AVER SCR - 14. 61 LABGRATGRIES REPORTING

* UNIT %

8
MATERIAL

D73-D74

ULTIMATE ELONGATION

MATERIAL D71-072 672. 7. MATERIAL 073-074 678- X

9
I NT ERL AEGR ATG RY PfcflGRAM ON EVALUAT 10 N GF RUFBFR

REPORT 34 - J STRESS AT 300% ELGNGATieN - PGUNDS PER SQUARE INCH OCTOBER 1977

MATERIAL D71-D72

CeRNERCIAL TIRE TREAD

LAB MF A N MEAN % EEL CdBE F PSI MEGAPA DEV SDR

V 0 0 7 £ 1036 . 7.146 5.4 .03

VO 076 1035. 7.138 5.3 .0 9 VO 0 7 o 0 63 . 6.645 -2.0 1 .52

VO 081 1000. 6.607 1 .7 1.10

VO 0 83 1 Cl 0 . 6.966 2.7 .72

VO 0 64 080 . 6.750 -.3 1.17

VO 0 8 5 030. 6 .417 -5.3 1 .22

VO 087 1020. 7 . 034 3.8 .58

VO 08 8 X 645 . 5.626 -14.1 2.75X

V0092 * 1030. 7 .1 03 4.8 1 .42

VO 0 95 000 . 6.626 . 7 .50

VO 096 028 . 6 . 403 -5.5 1.01

V01 00 605 . 6.172 -0.0 1.50

V01 1 1 050 . 6.552 -3.4 .60

VO 1 17 012. 6.203 -7.2 2.2 2X

V01 2 2 042. 6.500 -4 .

1

.06

VOl 23 080. 6.750 -.3 1.14

V01 26 070. 6.752 -.4 1 .00

VOl 28 1025. 7.C60 4.3 .67

VO 1 4 1 1074. 7.410 9.3 1.16

VOl 44 1 C 1 5 • 7.00C 3.3 .51 V0144B 035 . 6 .448 -4.9 1 .46

VO 1 4 6 022 . 6.431 -5.1 1.00

VOl 46 1 C 37 . 7.155 5.5 .89

VOl 49 1036 . 7.146 5.4 .04

VOl 50 1002 . 6.014 2 . C .72

VO 1 5 1 025. 6.370 -5.0 .02

VO 15 2 1 CSO . 7.241 6.8 .82

VOl 53 803 . 6.162 -0.1 3.09X

VO 15 4 000 . 6.628 . 7 .26

VOl 56 1010 . 6.066 2.7 .57

VO 1 5 6 065. 6 .652 -1 .0 1.10

VOl 59 065 . 6 .655 -1.8 1 .44

VOl oO 1007 . 6.046 2.5 . 63

VOl 54 045 . 6.517 -3.9 1.16

VO 1 66 1CC0 . 6.657 1 .

7

1 .05

VOl 68 080 . 6.821 .6 1.33

VOl 69 050 . 6.552 -2.4 .84

VOl 76 032 . 6 .431 -5.1 .80

VOl 77 030 . 6.414 -5.4 .71 V0178 1 07 5 . 7.414 0.4 .03

VOl 84 060 . 6.663 -1 .4 .66

VOl 99 1000. 6 .607 1 .7 1.45

*8 O M o o 027. 6.303 -5.7 .78 V0206 070 . 6 .650 -1 .

3

. 50 V02O7 1 CCO . 6.607 1 .7 .ee

V02 ce 1 C01 . 6.002 1 .

8

2.33X

V0220 1000. 6.607 1.7 1 . 05 V0223 000 . 6.626 .7 1.27 V0224 1022 . 7.C52 4 .

0

1 .35 V0225 1050 . 7.241 6.6 .08 V0232 060. 6.621 -2.3 1 .00 V0233 1 025 . 7.C60 4.3 . 60 V0235 1043. 7.107 6.2 .76 V0238 075. 6.724 -.8 .09

VO 24 3 014. 6.303 -7.0 .92 V0244 e75

.

6.033 -11.0 1 .20 V0245A 1020. 7.034 3.8 2 • OOX V0245B 005 . 6.666 1 . 3 1 .77 V0246 0 37. 6.462 -4.7 1.13 V0250 1037. 7.155 5.5 1.16 983. 6 .770 * Gfi . MEAN

47. .322 * £D MEANS

23. .155 - AVER SDR

PSI MEGAPA UNIT

MATERIAL C73-D74

CGRMERCIAL TIRE TREAD

MEAN MEAN % REL VAR

PSI MEGAPA DEV SDR CGDE

1085. 7.485 11.1 .68 01 1015. 7.000 3.9 1.13 01 036. 6 • 459 -4. 1 1 . 58 01 962. 6.638 -1.5 1 .43 01 095. 6.862 1 . 8 1.31 01

000. 6.828 1.3 1 .25 01 690. 6.137 -8.9 . 50 20

1 020. 7. 034 4.4 1 .04 01 784. 5.406 -19.7 1.12 01 940. 6.483 -3.8 1 .00 01

955. 6.586 -2.2 .98 01 e84. 6.100 -9.5 1 . 06 01 940. 6 .483 -3.8 1 .42 01 900. 6.207 -7.9 .37 01 687. 6.121 -9.2 1 .49 01

882. 6 . 0 e 6 -5.7 .90 01

1 020. ’.034 4.4 .95 01 968. 6.677 -.5 1.11 20 985. 6 . 793 .8 .66 01

1 043. 7.197 6.8 2 .OOX 01

1 045. 7.207 7.0 1 .37 01 800. 6.138 -8.9 1 . 47 01 930. 6.414 -4.8 .62 01 1057. 7.293 e .2 1 . 04 01

I 013. 6.986 3.7 . 68 01

1 0C5. 6.931 2.9 .71 01 ooo. 6.207 -7.9 . 54 01 1020. 7.034 4.4 . 50 01 910. 6.276 -6.9 2 • 5 1 X 01 985. 6.793 .8 .82 01

1 040. 7.172 6.5 1 .24 01

9 86. 6.802 1.0 1 .64 20 900. 6.828 1.3 .96 01

1 040. 7.172 6.5 1 . 06 01 953. 6.57 6 -2.4 .41 01

1007. 6.945 3.1 .81 01 1000. 6.9C0 2.4 1.21 01 943. 6.502 -3.5 . 63 20 890. 6. 138 -8.9 1.79 01 950. 6.552 -2.8 .57 01

1 025. 7. C65 4.9 1 .51 01 975. 6.724 -.2 1 .67 01

1 025. 7.069 4.9 .71 01 960. 6.621 -1.7 .65 01 985. 6.793 . 8 .92 01

1015. 7.000 3.9 .74 01 994. 6.852 1 .7 2 • 65X 20

1010. 6.966 3.4 .92 01 995. 6.862 1.8 1.13 01 987. 6. 81 0 1 . 1 2.86X 01

1031. 7.110 5.5 1 .55 01 985. 6.793 .8 1 .32 01

1 043. 7.197 €.8 .65 01 1049. 7.238 7. 4 .72 01 1000. 6 . 897 2.4 .70 01 914. 6.303 -6.4 1 .31 01 875. 6 . 033 -10.5 .73 21 967. 6.669 -1 .0 1 .03 01 960. 6.621 -1 .7 1 .36 01 965. 6 .659 -1.2 .87 01

1 COO. 6.897 2.4 .39 01

077. 6.736

52. .357

£3. .158

PSI MEGAPA

INSTRUMENT, UNIT, fiR GTHT k VARIATION

ORIGINAL IN MEG ANE WTO Ns PER SO. METER

ORIGINAL IN MEGANEWTONS PER SO. METER

ORIGINAL IN MEGANEWTONS PT k SO. METER

ORIGINAL IN MEOANHWTflNS PFR SO. METER

ORIGINAL IN MEGANEWTONS PER SO. METER

ORIGINAL IN K I L OCR AMS/SQ . CENTIMETER

5 TEST DETERMINATIONS

60 LABORATORIES IN GRAND MEANS

61 LABORATORIES REPORTING

10
MATERIAL

D73-D74

STRESS RT 3007. ELONGATION

MATERIAL 071-072 983- PS I MATERIAL 073-D74 977. PSI

11

REPORT 34-2

INTERI. ARORATCRY PROGRAM t)N EVALUATION OF RUBBER OCTOBER 1577

HARDNESS

NOTES

Materials D71 and D72 were sheets of the same vulcanized rubber. Similarly, materials D73 and D74 were alike.

V100 results were obtained at NBS using ASTM D1415. V200 results

were obtained at NBS using ASTM D2240.

Five of the 27 participants reporting used ASTM D1415 (Wallace) for the hardness determination. All others used ASTM D2240

(Type A Durometer).

SUMMARY OF ANALYSES

LABS LABS STD DEVIATIONS

PROPERTY MATERIAL INCL eMIT GR. MEAN LABS SHEETS REPL UNITS

HARDNESS D71-D72 27 0 58.44 1 .65 .22 .47 IRHD D73-D74 27 0 £8.56 1 .77 .19 .53 IRHD

PRECISION GF METHODS

RE PL RE PL AESOLUIE PERCENT

PfiePEBTY MATERIAL CRF ASTM GR. MEAN REPEAT HEPK6D UNITS REPEAT REPROD HABDNES S D71-D72 5

c 58.44 1 .30 4.68 IRHD 2.

8.0 D73-D74 5 5 58.56 1.48 4.90 IRHD 2.5 8.4

13
INTERLABORATORY FROGRAM ON EVALUATION OF ROBBER

REPORT 34-2 HARDNESS - IRHD OCTOBER 1977 MATERIAL D71-D72 MATERIAL D72-D74

COMMERCIAL TIRE TREAD COMMERCIAL TIRE TREAD

LAB MEAN * REL MEAN * REL VAR CODE F IRHD DEV SDR IRHD DEV SDR CODE INSTRUMENT. UNIT. 6R OTHER VARI

VO 0 7 8 59.50 1.8 .95 59.00 .7 .93 01

VO 08 1 59 .50 1 .8 1.79 59.50 1 .6 1 . 03 01 VO 084 ec .00 2.7 1.06 60.50 3.3 1.03 01 VO 0 85 59.00 1 .0 .62 59.45 1.5 .71 01

VO 0 8 7 58.50 .1 S.52X 60.00 2.5 1.26 01

VO 08 8 56 .00 -4.2 1.37 56.00 -4.4 1 . 06 01 V0092 56.00 -4.2 1 .65 56.50 -3.5 1 .62 01

V01 00 58.00 -.e .65 58.10 -.8 .54 01 V01 1 1 61 .00 4.4 .58 60.50 3 .3 .00 01

VO 122 58.25 - .3 .92 58.75 .3 . 65 01

V01 28 55 .50 -5.0 .se 55.50 -5.2 . 00 01 VO 1 4

1

57.00 -2.5 .88 55.50 -5.2 1.35 01 VO 144 6 0.50 3.5 1.17 61. CO 4.2 .00 01 V01 44B 61 .00 4.4 .89 61.00 4.2 1.18 01 V01 68 59 .25 1 .4 .82 59.50 1.6 .65 01 V0169 * 60.00 2.7 .48 58.00 -1 .0 .00 01

VO 176 60. CO 2.7 1.26 60.00 2.5 1 .33 01 V0200 5 7.00 -2.5 .67 56.75 -3.1 . 51 01 V0206 57 .CO -2.5 .48 57.00 -2.7 .93 01 V0208 57.75 -1 .2 1.24 58.40 -.3 1 .94X 01 V0214 57.00 -2.5 3 • 3 3 X 58.00 -1.0 2 . 55 X 01 VOL 2

4

55.00 -5.9 .00 55.00 -6.1 . 00 01 V0233 60.00 2.7 1 .78 60 .CO 2.5 1 .08 01 V0235 58.25 -.3 1 .24 58.75 .3 .60 01 V0243 58.00 -.8 .58 56.50 -.1 . 00 01 V0244 59 .50 1.8 1.17 60.00 2.5 .93 01 V0246 59.50 1 .8 1.17 60.00 2.5 1 . 57 01 58.44 * Gfi . MEAN - 58.56 5 TEST DETERMINATIONS

1 .69 * SD MEANS - 1 .77 27 LABORATORIES IN GRAND MEANS

.47 - AVEJS SER - .53 27 LABORATORIES REPORTING

IRHD • UNIT IRHD

14
MATERIAL

D73-D74

HARDNESS

MATERIAL D71-D72 58.44 I RHD MATERIAL D73-D74 58-56 I RHD

15

REPORT 34 4 INTEELAEORATeRY PROGRAM AN EVALUATION OF RUBBER OCTOBER 1977

MOONEY VISCOSITY

NOTES

Materials U71 and U72 were the same rubber. Similarly, materials

U73 and U74 were the same rubber. No sample preparation was required for materials U71 and U72 whereas, mill massing was required for materials U73 and U74.

V100 results were obtained at NBS on the manually closed viscometer

used for determining the Mooney viscosities of the standard rubbers.

SUMMARY eF ANALYSES

LAES LABS STD DEVIATIONS

PROPERTY MATERIAL INCL OMIT GR. MEAN LABS SBEETS REP L UNITS

MeeNE* U71-U72 42 4 ee.os 2.11 .28 .38 ML iscesnY C73-U74 42 4 61.85 2.60 .38 .SO ML

PRECISION OF METHODS

RE PL REPL ABSOLUTE PERCENT

PROPERTY MATERIAL CRP ASTM GR. MEAN REPEAT REPROD UNITS REPEAT REPROD

MeeNEY U71 -U72 3 3 68.05 1.04 5.84 ML 1.5 8.6

VISCOSITY C73-C74 a 3 61.85 1.39 7.20 ML 2,2 1 1 .6

17
I NTERLABflkATdkY PROGRAM ON EVALUATION OF RUBBER

REPORT -3 4 - 4 MCeNEY visces ITY - ML OCTOBER 1977

MATERIAL U71 — U72 MATERIAL U7 3-U74

BUTYL RUfcbE k SER LAB MEAN % KEL MEAN % REL VAR

CODE F ML EE V SDR ML LEV SDfc CODE INSTRUMENT, UNIT, OR OTHFR VARI ATI6N

VO 0 75 X 50. CO '26.5 2.66X 51.50 -16.7 4 . 06 X 01

VO 0 77 £7.15 -1 .3 1.12 59.85 -3.2 1.20 01 V0078 • £ 3 • es -6.2 2.51 X 63.70 3.0 1.35 01 V0079 69.80 2.6 1.78 63.85 3.2 1.08 01 V0080 69.90 2.7 .40 63.60 2.8 1.73 01

V0083 68 .50 .7 .77 62.25 .7 1 .05 01

VO 085 £7 .95 -.1 1.67 62.05 .3 1.24 01 V0090 £8.50 .7 .77 62.00 .2 1.72 01 V0092 67.00 -1.5 1.54 63.50 2.7 .57 01 V0093 66.60 -2.1 .93 61.00 -1.4 .95 01 V009S 68.25 .3 .77 62.00 .2 1 .05 01

VO 100 68.65 .9 .51 61.70 -.2 .62 01 voi n 67.10 -1.4 1.28 58.50 -5.4 .81 01 V01 1 7 66.25 -2.6 2 . 83 X 59.50 -3.8 2.25 01 VO 120 72.00 5.8 .58 66.80 8.0 .82 01

VO 122 64 .75 -4. e 1.43 60.50 -2.2 1.05 01

VO 1 28 67.25 -1.2 1.43 63.50 2.7 .86 01

VOI 44 X 69.50 2.1 1.43 52.75 -14.7 1.15 01 VOI 46 66.75 1.0 .77 65.00 5.1 .57 01 VOI 48 6 72.50 6.5 e,14X 56.00 -9.5 2.30 01

VOI 49 69 .80 2.6 .71 64.45 4.2 .57 01

VOI 50 69.30 1.8 .54 58.40 -5.6 .87 01 VOI 56 66.00 -3.0 .00 60.75 -1.8 1.07 01 VOI 1 6 67 .75 -.4 .66 64. 2S 3.9 .57 01 VOI 69 70.12 3.1 1.10 62.50 1.1 . 29 01

VOI 77 65.15 -4.3 .83 61.75 -.2 .61 01 VOI 78 68.50 .7 .38 61 .00 -1 .4 1 .32 01 VOI 82 66.75 -1.9 .77 60.25 -2.6 .57 01

VO 190 67 .60 -.7 1.02 59.30 -4.1 .70 01 V02 06 71.00 4.3 1.15 62.50 1 .1 . 86 01 V0207 69 .40 ro • o .68 62.65 1 .3 .77 01 V02C8 67.00 -1.5 1 .33 61.00 -1.4 1 . IS 01 V02 1 1 69.25 1.8 1.40 64.25 3.9 . 86 01 V0213 66 .75 -1.9 .38 60.75 -1.8 1 . 15 01 V02 14 65.00 -4.5 1.23 60.00 -3.0 1 . 15 01

V02 1 8 69 .25 1.8 .54 61.50 - .6 .29 01 V0220 69.05 1.5 2. 05 £1.15 -1 .1 3 . 09X 01 V0221 70.25 3.2 .77 64.00 3.5 .86 01 V0223 69.50 2.1 . 3e 64.25 3.9 .50 01 V0230 65.70 -3.5 1.14 56.80 -9.8 .35 01 V0236 * 72 .50 6 .5 1.54 69. CO 11 .6 1 .57 01 V0238 64.50 -5 .2 .77 58.00 -6.2 .57 01 V0244 X 74 .00 8.7 1.54 55.50 -10.3 1.52 01 V0246 X 76.50 12.4 .77 62.00 .2 1.15 01 V0250 65.50 -3.7 1.54 60.50 -2.2 1. IS 01 V0251 67 .70 -.5 1.27 64.25 3.9 1 .76 01 ee .05 • GR . MEAN • £1.85 3 TEST DETERMINATIONS

a. u • SD MEANS • 2.60 42 LABORATORIES IN GRAND MEANS

.38 - AVER SER • .50 46 LABORATORIES REPORTING

ML * UNIT • ML

IS
MATERIAL

U73-U74

M0QNEY VISCOSITY

MATERIAL U71-U72 68-05 ML MATERIAL U73-U74 61-85 ML

19

REPORT 34 5 INTEBLABCSATCRY PROGRAM ON EVALUATION OF BUBBBR NOVEMBER 1977

VULCANIZATION CHARACTERISTICS USING OSCILLATING DISK CURE METER

NOTES

Materials Z71 and Z72 were the 9ame rubber formulation. Similarly, materials Z73 and Z74 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

frequency.

All participants used Monsanto Rheometers operated at one degree

amplitude and 1.7 hertz frequency.

V144 data is meaningless due to a reporting error.

SUMMARY OF ANALYSES

LABS LABS STD DEVIATIONS

PROPERTY MATES IAL I NCL OMIT GB. MEAN LABS SHEETS BEPL UNITS

SCORCH Z71-Z72 37 1 4.446 .317 .036 .074 MINUTES

TIME Z73-274 37 1 3.507 .275 .039 .053 MINUTES

CUBE TIME 271-272 36 2 6.59 .40 .03 .07 MINUTES

( 50% MB ) 273-Z74 36 2 7.34 .47 .03 . 06 MINUTES

CUBE TIME Z71-Z72 36 2 10.04 .59 .05 .12 MINUTES

( 90% MB ) Z73-Z74 36 2 14.65 .92 .06 .13 MINUTES

MINIMUM Z71-Z72 35 3 4.92 .53 .04 .08 POUND-INCHES

TeiGUE 273-274 35 3 6.33 .58 .03 . 08 POUND- INCHES MINIMUM 27 1 —272 35 3 .5563 . 0597 .0050 .0088 NEWTON-METEBS

TORQUE 273-274 35 3 .7154 • 0661 .0038 .0095 NEWTON-METERS

MAXIMUM Z71-Z72 36 2 22.25 1.03 .04 .13 POUND-INCHES

TOBCCE 273-274 36 2 30.31 1.47 .04 • 12 POUND- INCHES MAXIMUM 271-Z72 36 2 2.5139 . 116C .0046 .0152 NEWTON-METERS

TCBCUE Z73-Z74 36 2 3.4251 .1665 . 0049 .0139 NEWTON-METEBS

PEOPEBTY HATES IAL BEPL

CBP BEPLA STM

PKECISI 6 N OF

GB.MEAN

METHODS

ABSOLUTE REPEAT BEPBOD UNITSPEfiCENT REPEAT BEPBOD

SCOBCB 271 -272 a 3 4.446 .204 .878 MINUTE 4.6 19.7 TIME 273-274 3 3 3.507 .146 .762 MINUTE 4.2 21.7

CUBE TIME Z71-272 3 3 6.59 .20 1 .11 MINUTE 3.0 16.8

( 50% MB ) 273-Z74 3 3 7.34 .16 1.30 MINUTE 2.2 17.7

CUBE TIME 271-272 3 3 10.04 . 34 1.62 MINUTE 3.4 16.1

( 90% MB ) 273-274 3 3 14.65 .37 2.56 MINUTE 2.5 17.5

MINIMUM 271-272 3 3 4.92 .22 1 .46 LB-IN, 4.4 29.7

TONGUE 273-274 3 3 6.33 .23 1 .62 LB-IN, 3.7 25.6 MINIMUM Z71-Z72 3 3 .5563 .0244 .1653 N-M 4.4 29.7

T€BG UE 273-274 3 3 .7154 . 0263 .1830 N-M 3.7 25.6

MAXIMUM 27 1 -Z 72 2 3 22.25 .37 2.84 LB-IN. 1.7 12.8 TONGUE 273-274 3 3 30.31 .34 4.08 LB-IN. 1 . 1 13.5 MAXIMUM 271-272 3 3 2.5139 . 0421 .3214 N-M 1.7 12.8 TesquE 273-274 3 3 3.4251 . 0386 .4611 N-M 1.1 13.5

21
I NTE ML ABO R ATOMY PROGRAM ON EV ALU AT 10 N OF HOBBES

REPORT 34 - 5 SCtJRCH TIME - MINUTES N6VEMBE R

MATERIAL Z71 -272 MATERIAL Z73— 274 ceMWEkC IAL TIRE I BE AD SER

LAB MEAN % EEL MEAN % REL VAR CODE F MIN DTE DEV SDR MINUTE DEV SDR CODE INSTRUMENT, UNIT. OR OTHER VARI V0077 4. SCO 1 .2 3.38X 3.750 6.9 1 .00 01 V0073 4.875 9.6 .00 3.750 6.9 .00 01

V 0079 4.550 2.3 2.35 3.375 -3.8 .00 01 VO 0 83 4.900 1C.

2

1 .C7 3.900 11.2 .55 01 V008S 4.300 -3.3 1.30 3.275 -6.6 .55 01 VC090 4.710 5.9 .46 3.750 6.9 .75 01 V0092 4.600 3.5 .78 3.425 -2.3 3.28X 01 V0093 4.600 3.5 .00 3.67 5 4.8 .55 01 V0095 4.550 2.3 .78 3.500 -.2 1.64 01 VOl 00 4.600 3.5 .39 3.7C0 5.5 .00 01

V01 1 7 3.875 -12.8 2.5 3X 3. ICO -11.6 3.34X 01 VOl 22 4.300 -3.3 1 .43 3.300 -5.9 1 .64 01 VOl 28 4.400 -1.0 1 .18 3.350 -4.5 .55 01 VOl* 4 X 3.96 5 -ic.e 1 .64 4 .060 15.8 1 .05 01 VOl 49 4.500 1 .2 1.27 3.500 - .2 .55 01

VOl 50 5 . 100 14.7 2.C7 4.200 19.8 2. SIX 01 VOl 52 4.550 2.3 .00 3.600 2.7 .00 01 VO 154 4.425 -.5 .59 3.550 1.2 .27 01 VOl 56 4.500 1.2 .54 3.550 1.2 .55 01 VO 1 58 4. COO -1 C .0 3.363! 3.100 -11.6 .55 01

VOl 59 4.750 6.8 .81 3.575 1 .9 1 .66 01 VOl 61 4.300 -3.3 .39 3.300 -5.9 .00 01 VO 1 6 6 4.400 -1 .0 .78 3.450 -1.6 .55 01 VOl 69 4.300 -3.3 2.64X 3.250 -7.3 . 55 01 VOl 78 4.050 -8.9 1.18 3.100 -1 1.6 . 00 01

VO 182 4 .50 0 1.2 .98 3.625 3.4 1.52 01 V0206 4.8C0 8.0 .68 3.75 0 6.9 .00 01 V0207 » 4 . 850 9.1 .78 4.200 19.8 1.64 01

VO 2 08 4.355 -2.1 2.12 3.38 0 -3.6 .93 01 V02 1 1 3.9C0 -12.3 .39 3.150 -10.2 1.49 01

V02 1 3 * 3.925 -11.7 1.05 3.450 -1 .6 2.55X 01 V0214 4.700 5.7 1 .C7 3.725 6.2 3.88X 01 V0218 4.400 -1.0 .78 3.400 -3.0 .55 01 V0220 3.750 -15.7 3. SIX 3.100 -11.6 2. 18 01 V0221 4 .200 -£.5 .20 3.5C0 -.2 .55 01

V02 3 8 4.900 10.2 1 .57 3.800 e .4 2. 18 01 V0247 4 .200 -5 .5 .00 3.300 -5.9 1 . 09 01 V0246 4.400 -1 .0 .00 3.350 -4.5 .00 01

4 .446 • GR . MEAN - 3.507 3 TEST DETERMINATIONS

.317 • SD MEANS - .27 5 37 LABORATORIES IN GRAND MEANS

• C74 • AVER SDR * . 053 38 LABORATORIES REPORTING

M INITE • UNIT MINUTE

22
8

-

6

4

-

2

-

0

-

8-

6-

4

-

2-

0-

8-

6-

4

-

2-3

SCORCH TIME

IflTERIflL 11 \ -212 4.446 MINUTE MATERIAL Z73-Z74 3-507 MINUTE

2 3.4 3.6 3.8 4.0 4-2 4.4 4.6 4.8 5-0 5.2 5-4 5 . MATERIAL Z71-Z72

23
INTEkLABORATCRV PROGRAM ON EVALUATION OF RUBBER

REPORT 34 - 5 CURE TIME ( 50* MU

- MINUTES NOVEMBER 1977

RATE RIAL Z71 -272 MATERIAL Z73-•Z74 COMMERCIAL TIkE 1 READ SER

LAB MEAN 4 EEL MEAN * REL VAR

CODE F MINUTE DEV SDR MINUTE DEV SDR CODE INSTRUMENT. UNIT, OR OTHFR VARIATION

VO 077 6 .67 1 .3 2 . 76 X 7.80 6.3 1 .72 01 V0078 7.12 6.1 .00 7.94 6.1 .00 01 VO 079 7. CO 6.2 2.20 7.92 8. 0 .49 01 V0083 7.25 10.0 .80 8.10 10.3 .49 01 V0C85 6.62 .5 2.50X 7.15 -2.6 1.55 01 V0090 6.83 3.7 .56 7.71 S.O .43 01 V0092 6 .40 -2.9 1 .09 7.20 -1.9 4. 10X 01 V0053 6 .75 2.4 .20 7.80 6.3 .90 01 VO 095 6.65 .9 .80 7.40 .8 1.48 01 V0100 6 .70 1.7 .80 7.30 -.6 .98 01

V01 1 7 6 .30 -4.4 1.38 7.25 -1 .2 .49 01 VOl 22 6.50 -1.4 .80 7.40 .8 .85 01

VOl 28 6.25 -5.2 .eo 7.00 -4.6 .98 01

VO 144 X 7.17 6.8 1.36 7.27 -.9 2.33 01 VOl 49 6.77 2 .e .40 7.47 l .8 .25 01 VOl 50 7.05 7 . C 2 • C 6 7.70 4.9 2.61 X 01 VOl 52 6.70 1 .7 .00 7.40 .8 .00 01 VOl 54 6 .57 -.2 .55 7.42 1.2 .49 01 VOl 56 6 .57 -.2 .35 7.20 -1.9 .74 01 VOl 58 5.95 -9.7 3.86X 6.40 -12.8 .98 01 VOl 59 6 .85 3.9 .60 7.50 2.2 1.14 01 VO 1 6 1 6 .35 -3.7 .40 6.80 -7.4 .98 01 VO 1 66 6 .40 -2.9 1 .49 7.20 -1.9 .98 01 VOl 69 6.35 -3.7 2.23 7.10 -3.3 1.79 01 VO 178 6 .25 -5 .2 1 .09 6.95 -5.3 2.56X 01

VO 1 82 6 .65 .9 .93 7.37 .5 1 .62 01 V0206 6 .95 5.5 .80 7.70 4.9 .98 01 V0207 X 6 .45 -2.1 1.49 17.05 99.9 2.63X 01 V02C8 6.70 1.7 1 .65 7.41 .9 1 .08 01 V021

5 .72 -13.1 .55 6.25 -14.9 1.78 01 V021 3 7 .00 6.2 1 .00 8. CO 9.0 1 .48 01 VO 214 7.00 6.2 1.22 7.60 3.5 3.25X 01 vo 2

a 6 .45 -2.1 . 80 7.20 -1.9 .49 01 V02 2 0 * 5 .55 -15.8 1.75 6.30 -14.2 3 • 01 X 01 V0221 6 .30 -4.4 .40 7.30 -.6 .85 01 V0238 7 .45 12.0 3.57X 8.15 11.0 .49 01 V0243 6.15 -6.7 1 .20 6.70 -8.7 1.48 01 V0246 6 .45 -2.1 ' . 00 7.15 -2.6 .00 01 6.59 • GR . MEAN • 7.34 3 TEST DETERMINATIONS

.40 * SD MEANS - .47 36 LABORATORIES IN CRAND MEANS

.07 AVER SDR • .06 38 LABORATORIES REPORTING

MINUTE • UNIT MINUTE

24
MATERIAL

Z73-Z74

CURE TIME (50-% MH ) MATER I PL Z71-Z72 6-59 MINUTE MATERIAL Z73-Z74 7.34 MINUTE

25
INTERLABOMATflRY PROGRAM eN EVALUATION OF RUBBER

REPOST 34 - 5 CUKE TIME < 90* MU ) • MINUTES NOVEMBER 1977

MATERIAL 271 -Z72 MATER I A L Z73--Z74 COMMERCIAL HUE TSEAE SEE

LAB MEAN * BEL MEAN « BEL VAB CODE F MINUTE EEV SOB MINUTE EE V SDK CODE INSTRUMENT. UNIT, OR OTHER VARIATION

VO 077 10.22 1 .8 1.54 15.52 e.7 1 .63 01 VO 0 78 1C. 54 8.5 .00 15.65 7.1 .00 01 VO 07 9 10.50 4.5 4 . 45 X 15.87 8.4 .00 01

VO 0 83 10.75 7.0 1.02 16.05 9.6 .22 01

VO 0 85 10.07 .3 2.81 X 14.02 -4.2 .65 01 V0090 10.45 4.4 .56 15.25 4.1 1 .33 01 V0092 5.72 -3.2 .81 14.50 -1.0 2.05 01 VO 093 10.25 2.1 .70 15.60 6.5 .50 01

VO 09 £ 5.50 -1 .4 .23 14.60 -.3 1.00 01 voico 1 0 .00 -.4 .00 14.80 1.1 . 00 01

V011 7 5 .50 -1.4 1 .71 14.57 - .5 1 .63 01

VO 122 10.30 2.6 .70 15.50 s.e .65 01 V01 28 5.55 -4.5 2.11 14.10 -3.7 1.56 01 VO 1 4 4 X 12. €4 25.5 1.46 12.70 -12.3 1.05 01 V01 49 10.32 2.8 .82 15.07 2.9 . 56 01

VO 1 50 1 0 .50 5.5 1.04 14.85 1 .4 1 .76 01 V01 52 10.30 2.6 .23 14.75 .7 .00 01 V01 54 5 .52 -1.2 .71 14.87 1.6 .71 01 V01 56 5.55 -1 .5 .47 14.20 -3.0 .11 01 V01 58 5.15 -e.5 1.75 13.50 -7.8 1.29 01

V01 59 1 C .53 £.8 1 .£5 15.37 5.0 1.29 01 voiei 5 .55 -3.5 .87 13.85 -E.4 . 80 01 V01 66 5 .70 -3.4 .47 14.15 -3.4 .59 01

V01 69 5 .80 -2.4 2.65X 14.35 -2.0 . 80 01

V01 78 « 10.00 -.4 .00 13.10 -10.6 2.15X 01

V01 82 1C .22 1.8 • 3 £ 14.77 .9 .61 01 V0206 10.70 6 .5 .54 15.20 3.8 1.29 01 V0207 X 10.85 8.C 1.65 25.85 76.5 1.77 01 V0208 10.22 1 .8 1.52 14.15 -3.4 2.58X 01 V021 1 8 .60 -14.4 .54 12.40 -15.3 1.03 01

V021 3 1C. 00 -.4 .00 15.00 2.4 . 00 01 V02 1 4 1 C .50 4.5 1 . 26 15.02 2.6 1.11 01 V021 8 5 .50 -1 .4 .64 14.00 - 4.4 .79 01 V02 2 0 8.65 -13.5 .54 12.85 -12.3 1.08 01

VO 2 2 1 5.45 -5.5 .70 14.80 1.1 . e6 01 V0238 11.35 13.0 2.11 16.65 13.7 1.37 01 V0243 5 . 35 -6.5 .47 13.35 -e ,e .75 01 V0246 5.80 -2.4 .00 14.50 -1 .0 . 00 01 10.04 • GS . MEAN - 14.65 3 TEST DETERMINATIONS

.55 • SD MEANS • .<52 36 LABORATORIES IN GRAND MEANS

.12 • AVER SDR - .13 38 LABORATORIES REPORTING

MINUTE • UNIT MINUTE

26
MATERIAL

Z73-Z74

CURE TIME ( 90 X MH ) MATERIAL Z71-Z72 10-04 MINUTE MATERIAL Z73-Z74 14-65 MINUTE

27
INTEKLABO RAT0RY PROGRAM ON EVALUATION OF RUBBER

REPORT 34 m c MINIMUM TORQUE - POUND— INCHFS NOVEMBER 1977

MATFRIAL Z7 1-272 MATERIAL 27 3 — 27 4 COMMERCIAL TILE TREAD SER

LAB MEAN MEAN * BEL MEAN MEAN % BEL VAR CODE F LE-IN. N-M DEV SDR LB-IN. N-M DEV SDR CODE INSTBUMENT. UNIT. 02 OTHER VARIATION

VO 077 * 5.55 .6271 12.7 2.04 6.25 .7062 -1 .3 .86 01 V0078 5.25 .5932 6.6 .00 6.82 . 7712 7.6 .00 01

VO 079 4 . 9 C .5537 -.5 1.30 6.50 .7344 2.7 .00 01 V0083 5.0C .5649 1.5 .37 6.40 .7231 1.1 .34 01 V0085 4.07 .4600 -17.3 . 57 5.53 .6250 -12.6 .30 40 ORIGINAL IN NES TON- METER

VC090 4.50 .sees -8.6 .19 6.00 .6779 -5.2 2.06X 01

VO 09 2 4.70 .5311 -4.5 .74 5.95 .6723 -6.0 .34 01 V0093 5.10 .5762 3.6 1.85 6.50 .7344 2.7 .60 01 V0095 4 .60 .51 9e -6.6 .74 6.25 .7062 -1.3 1.82 01 V01 00 4 . 7 C .531 1 -4.5 .00 6. 30 .7118 -.5 .00 01

VOl 1 7 X 9.05 1 . 0226 83. 8 1.11 12.20 1.3785 92.7 1 .82 01 V0122 5 .0 C .5649 1 .5 .00 6.00 . 6779 -5.2 .00 01 VOl 28 X 6.C5 .6836 22.9 3. 68X 6.50 .7344 2.7 .34 01 VOl 44 X 4 .90 .5537 -.5 3.24X 5.00 .5649 -21.0 2.49X 01 VOl 49 4 .80 .5424 -2.5 .99 6.17 . 6977 -2.5 1.30 01

VOl 50 4.50 .5085 -8.6 .00 5.55 .6271 -12.3 1 .37 01 VOl 52 4.25 .4802 -13.7 .37 5.70 .6440 -10.0 .00 01 VOl 54 4.30 .4859 -12.7 .74 5.95 .6723 -6.0 .94 01

VO 156 5.0C .5649 1 .5 .37 6.05 .6836 -4.4 1 .03 01

VOl 58 4.80 . 5424 -2.5 2.89X 6.50 .7344 2.7 1 .03 01

VOl 59 4.90 .5537 -.5 3.70X 6.20 .7005 -2.1 1.60 01 VOl 61 4.75 .5367 -3 .5 .64 6.05 • 6e36 -4.4 1.03 01

VOl 66 4.50 .5085 -8.6 .00 5.95 .6723 -6.0 .34 01 VOl 69 5.05 .5706 2.6 . 74 6.40 .7231 1. 1 1.82 01 VOl 78 e.cc .6779 21 .9 1.67 7.62 .8615 20.4 .00 01

VOl 82 6 .1 C .6892 23.9 1 .35 7.80 .8813 23.2 .34 01 V0206 4.20 .4746 -14.7 .00 5.70 .6440 -10.0 .00 01 V0207 6 .05 .6836 22.9 2. 67X 7.20 .8135 13.7 2.63X 01 V02 08 4.47 .5051 -9 .2 .00 6.05 . 6842 -4.4 .65 01 V02 1 1 4. 30 .4859 -12.7 .74 5.65 .6384 -10.8 1 .14 01

V021 3 5.29 .5977 7.4 3.94X 6.85 .7740 8.2 1 .03 01 V0214 4.65 . 5254 -5.6 2.70X 5.65 . 6384 -10.8 1.82 01 V021 8 4.85 .5480 -1 .5 1.62 6. 15 . 6949 -2.9 1.25 01 V0220 5.45 .6158 10.7 1 . 38 6.85 . 7740 8.2 1.25 01 V0221 5. 40 .6101 9.7 .64 7.20 .8135 13.7 .69 01 V0238 5.75 .6497 16.8 1 .85 7.35 . 83C5 16.1 1 .50 01 V0243 5 .1 C .5762 3.6 1.11 6.70 .7570 5.8 .60 01 V0246 4.50 .soes -8.6 .00 5.80 .6553 -8.4 . 00 01

4 .92 .5563 - G £ . MEAN • 6.33 .7154 3 TEST DETERMINATION

S

.53 . 0597 - SE MEANS • .58 .0661 35 LABORATORIES IN GRAND MEANS

.08 . cose - AVER SDR • .08 . 0095 38 LABORATORIES REPORTING

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

28
MATERIAL

Z73-Z74

MINIMUM TORQUE

MATERIAL Z71-Z72 4.92 LB-IN. MATERIAL Z73-Z74 6.33 LB-IN.

29
REPORT 34-5

INTESLABefiATeRY FR6GKA M ON EVALUATION OF RUBBER MAXIMUM TORQUE - POUND- INCHES NOVEMBER 1977 MATERIAL Z71-Z72 MATERIAL Z73-Z74

COMMERCIAL TIRE TREAE SER LAB MEAN MEAN * EEL MEAN MEAN % REL VAR CODE F IB- IN

.

N-M DEV SDR LB-IN. N-M DEV SDR <CADE INSTRUMENT. UNIT. OR OTHER VAR I ATI

VO 077 £2.25 2.5140 . C 1 .93 25.87 3.3756 -1.4 1.17 01 V0078 22.62 2.5564 1 .7 .00 31.67 3.5790 4.5 . 00 01 V0C79 23.25 2.6270 4.5 2.68X 33.00 3. 7287 8.5 1.17 01 VO 0 83 22.75 2.5705 2.3 2.46X 31.05 3. 5083 2.4 1.17 01 V0085 21 .33 2.41 01 -4.1 .50 30.05 3. 3951 -.9 .77 40 ORIGINAL IN NEWTON— METER

V0090 22.00 2.4856 -1.1 .11 29.57 3.3417 -2.4 .23 01 V0092 23. 45 2.6456 5.4 .55 32.10 3.6270 5.9 .23 01 V0093 22.50 2.5423 1 .

1

1.20 30.50 3.4462 .6 1.17 01 V0095 «- 21.20 2.3554 -4.7 .80 27.05 3. 0564 -10.8 1.24 01 V01 00 22. 8C 2.5762 2.5 .00 31.50 3.5592 3.9 . 00 01

VOl 17 X 43.95 4 .5655 57.5 .86 61 .60 6.5602 95.9 4.02X 01 VO 122 23. OC 2.5988 3.4 .64 30.45 3.4405 .4 .70 01 VOl 28 21 .90 2.4745 -1.6 .56 29.65 3. 3502 -2.2 1.89 01 VO 1 44 X 27.05 3.0564 21.6 1 .00 26.90 3.0394 -11.3 2.92X 01 VOl 49 21 .75 2.4575 -2.2 .85 30.02 3.3925 -1.0 .35 01 V01S0 0 19.95 2.2542 -10.3 . 80 26. 10 2.5490 -13.9 .47 01

VOl 52 21 .20 2.3554 -4.7 .00 29.00 3.2767 -4.3 .00 01

VOl 54 22.25 2.5140 . C .21 30.85 3.4657 1 .8 .94 01

VOl 56 22. OC 2.4858 -1 .1 . 55 25 .20 3.2553 -3.7 .47 01 VOl 58 21 .80 2.4632 -2.0 4.66X 29.75 3. 3615 -1.9 .00 01

VOl 59 21 .55 2.4801 -1.3 1.62 29.65 3.3502 -2.2 1 .40 01 VOl 61 20.95 2.3671 -5.8 .59 29.20 3.2553 -3.7 1 .71 01 VOl 66 20.60 2. 3276 -7.4 .00 28.85 3.2596 -4.8 .70 01 VOl 69 24.2 0 2.7344 e.e 2.18 33. 10 3. 7400 9.2 .85 01 VOl 76 24.25 2.74CC 5.C 1 .07 32.85 3.7117 8.4 1 .72 01

VOl 82 23.6 5 2.6722 6.3 .43 31 . 65 3.5761 4.4 .70 01 V0206 20.65 2.3332 -7.2 .00 28.70 3. 2428 -5.3 .00 01 V0207 23. 1C 2.6101 3 .

8

1.51 31 .05 3.50e3 2.4 1.25 01 V0208 22.91 2.5666 3.0 1 .20 30.82 3.4824 1.7 2. 17X 01 V021

1

20.55 2.3671 -5.8 .21 29. 27 3. 3078 -3.4 .71 01 V0213 21.50 2.4293 -3.4 2.15 30.00 3.3857 -1 .0 .00 01 V0214 22.65 2.5552 1 . e 1.15 30.30 3.4236 - .0 1 .31 01 V0218 22.35 2.5253 . 5 .57 31.30 3.5366 3.3 .70 01 V0220 22.50 2.5423 1 .1 6 . 6 7X 31 .00 3.5027 2.3 1.77 01 V0221 23.75 2.6635 6 .7 .43 31.55 3. 5648 4.1 .85 01 V0238 23.15 2.6157 4 .

0

1.64 30.20 3.4123 -.4 1 .40 01 V0243 22.35 2.5253 .5 1 .20 30.50 3.4514 1.9 .94 01 V0246 21 .ec 2.4293 -3.4 .00 29.50 3.3332 -2.7 .00 01 22.25 2.5135 - GS. MEAN • 30. 31 3. 4251 3 TEST DETERMINATIONS

1.03 .1160 • SD MEANS - 1.47 .1665 36 LABORATORIES IN GRAND MEANS

.13 .0152 • AVER SDR • .12 .0139 38 LABORATORIES REPORTING

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

30
MATERIAL

Z73-Z74

MAXIMUM TORQUE

MATERIAL Z71-Z72 22-25 LB-IN. MATERIAL Z73-Z74 30-31 LB-IN31
NBS-1 14A (REV. 7-73)

U.S. DEPT. OF COMM. BIBLIOGRAPHIC DATA

SHEET

1. PUBLIC ATION OR REPORT NO. RUBBER CRP 34

2. Gov’t Accession

No.

3. Recipient’s Accession No.

4. TITLE AND SUBTITLE

INTERLABORATORY PROGRAMS FOR RUBBER

Analyses No. 34

October - December 1977

5. Publication Date 1/13/78

6. Performing Organization Code

7. AUTHOR(S)

E. B. Randall, J. Horlick, J. F. Stevenson, G. W. Bullman

8. Performing Organ. Report No. NBSIR 78-1327

9. PERFORMING ORGANIZATION NAME AND ADDRESS

NATIONAL BUREAU OF STANDARDS

DEPARTMENT OF COMMERCE

WASHINGTON, D.C. 20234

10. Project/Task/Work Unit No. 4015578

11. Contract/Grant No.

12. Sponsoring Organization Name and Complete Address (Street, 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

16. ABSTRACT (A 200-word or less [actual 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)

Collaborative reference program; Laboratory evaluation; Precision;

Reference samples; Rubber; Testing calibration.

18. AVAILABILITY Qj Uni imited

50? For Official Distribution. Do Not Release to NTIS

|

' Order From Sup. of Doc., U.S. Government Printing Office Washington, D.C. 20402, SD Cat. No. C 1 3

I ! Order From National Technical Information Service (NTIS)

Springfield, Virginia 22151

19. SECURITY CLASS

(THIS REPORT)

UNCL ASSIFIED

20. SECURITY CLASS

(THIS PAGE)

UNCLASSIFIED

21. NO. OF PAGES

36

22. Price

USCOMM.DC 29042-P74