13 3?

INTERLABORATORY PROGRAMS

FOR RUBBER

ANALYSES NO. 35

JANUARY - MARCH 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

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)

ie«

saa9

Collaborative Reference Programs

B360 Polymer Building

National Bureau of Standards

Washington, D.C. 20234

Rev, 4/77
INTERLABORATORY PROGRAMS

FOR RUBBER

Analyses No. 35

January - March 1978

J. Horlick

Office of Testing Laboratory Evaluation Technology

Office of Engineering Standards

National Engineering Laboratory

J. F. Stevenson, T. L. Cummings, Research Associates,

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 78-1339

INTRODUCTION

This report summarizes the test results for the first 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 Edwin B. Randall, Jr., Jeffrey Horlick, or Jeffrey Stevenson, (301) 921-2946.

Edwin B. Randall, Jr., Administrator

NBS Collaborative Reference Programs

Office of Testing Laboratory Evaluation Technology

June 12, 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.

* - The plotted point for the indicated laboratory lies

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

inside the 99% ellipse.

MEM 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 MEM from the

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

GR. MEM.

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 MEM The arithmetic average (grand mean) of all the laboratory MEM

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

SD MEMS The standard deviation among the laboratory MEM values included in the GR. MEM.

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
REPORT 35 INTERLABORATOKY PROGRAM ON EVACUATION OF RUBBER

TENSILE STRENGTH, ULTIMATE ELONGATION, AND STRESS AT 300% ELONGATION JANUARY 1973

NOTES

Materials A81 and A82 were sheets of the same vulcanized rubber. Similarly, materials A83 and A84 were alike.

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

results were obtained at NBS using an pendulum tester.

All participants used Die C in ASTM D412 with the following exceptions: V120 used ASTM Die B V126 used Die 2 in BS903 V208 did not specify a Die V213 used ASTM Die D

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

pendulum testers were used by 19 participants; 3 participants did not specify either type. Elongation measurements were made by automatic

devices by 22 (36%) participants and manually by the rest. There were

9 (15%) reported relative humidities above 55% and 27 (44%) reported relative humidities below 45%. SUMMARY OP ANALYSES

LABS LABS STD DEVIATIONS

PROPERTY MATERIAL INCL OMIT Gk. MEAN LABS SHEETS REPL UNITS

TENSILE A81-A62 60 1 2657. 1 24. 59. 72. POUNDS PER SQUARB INCH STRENGTH A83-A84 60 1 3725. 242. 155. 286. POUNDS PER SQUARE INCH TENSILE A81-A82 60 1 18.32 .85 .41 .50 MEGAPASCALS STRENGTH A83-A84 60 1 25.69 J .67 1.13 1.97 MEGAPASCALS

ULTIMATE A8I-A8

2

58 3 621 • 22. 10. 17. PERCENT ELONGATION A8?«=A84 50 3 681 . 25. 13. 32. PERCENT

STRESS AT A81-A82 59 2 1 1 48. 62. 16. 26. POUNDS PER SQUARB INCH 300* ELONGATION A83-A84 59 2 101 3. 61 . 20 . 30. POUNDS PER SQUARB INCH STRESS AT A81-A82 59 2 7.916 .429 .111 .178 MEGAPASCALS

300* ELONGATION A83-A84 59 2 6.989 .419 .135 .21 0 MEGAPASCALS

PROPERTY MATERIAL

REPL CRPRFPL ASTM

PRECISION OF

GR. MEAN

METHODS ABSOLUTE REPEAT REP ROD UNITS PERCENT REPEAT REPROD TENSILE A81-A82 5 5 2657. 20C. 343. PSI 7.5 12.9 3TRENGTH A83-A64 5 5 3725. 792. 671 . PSI 21 .

3

1 8.0 TENSILE A81-A82 5 5 18.32 1.38 2.36 MEGAPA 7.5 12.9 STRENGTH A83-AQ4 5 5 25.69 5. 46 4.62 MEGAPA 21 . 3 l 8. 0

ULTIMATE A81-AQ2 5 5 621 • 47. 61 . % 7.6 9.8 ELONGATION A83-A84 5 5 681 . 88. 69. % 1 3.0 10.2

STRESS AT A91-A82 5 5 1148. 71 . 1 72. PSI 6.2 15.0

?oo« ELONGATION A83»A84 5 5 1013. 84. 1 68. PSI 8. 3 16.6 STRESS AT A81-A82 5 5 7.91 6 .493 1.187 MEGAPA 6.2 15.0 300% ELONGATION A83-A84 5 5 6.989 .582 1 . 1 60 MEGAPA 8. 3 16.6

5
I NTERLAB6RAT0RY PR8GRAM 8N B VALOATI 0N 0F ROBBER

RBP8RT 35 = 1 TENSILE STRENGTH - P0UNDS PER SOOARE INCH JANOARY 1978 MATERIAL A81=A82 MATERIAL A83-A84 C8MMERCIAL TIRE TREAD SBR

LAB WBAN MEAN % REL MEAN MEAN % REL VAR CODE F PSI MEGAPA DEV SDR PSI MEGAPA DEV SDR C8DE INSTRUMENT, OMIT, 0R 0THER VARIATION

VO 0 76 2740. 1 8.90 3.1 1.04 3640. 25.10 = 2.3 1.40 01 VO 0 78 2615. 1 8. 03 = 1 .6 .63 3580. 24. 69 -3.9 1.48 01 vooei 2612. 1 8.02 -1.7 1.43 4025. 27.76 8.0 • 87 01 VO 0 03 2525. 17.41 = 5.0 .64 3650. 25.17 -2. 0 .57 01 VO 0 84 2695. 18. 59 1.4 .59 3825. 26.38 2.7 .72 01

VO 005 2611. 1 8.00 -1.7 .71 3677. 25.36 = 1.3 1.38 20 ORIGINAL IN MBGANEWTONS PER SO. METER

VO 0 07 2590. 1 7. 86 = 2.5 1.11 3505. 24.17 = 5.9 1.45 01

VO 0 88 2420. 16.69 = 8.9 .76 3550. 24.48 = 4.7 .96 01 VO 0 92 2620. 1 8. 07 = 1.4 1.32 3540. 24.41 -5.0 1.32 01 VO 095 2700. 18.62 1.6 1 .00 3950. 27.24 6. 0 1.28 01 V0096 2612. 1 8. 01 -1.7 . 83 3432. 23.67 = 7.5 1.01 01 VOl 0 0 2690. 18.55 1.2 1.21 3065. 26.66 3.7 .90 01 VOl 11 2770. 19.10 4.3 1.04 3990. 27.52 7.1 .64 01 VOl 1 7 2645. 18. 24 -.5 1.24 3990. 27.52 7.1 • 98 01 VOI 20 * 2657. 18.32 .0 .85 3268. 22.54 = 12.3 .95 01

VOl 22 2405. 16. 59 -9.5 1 .01 3600. 24.83 = 3.4 1.71 01 VOI 23 2735. 1 8. 86 2.9 1 . 05 3855. 26.59 3.5 .34 01 VOl 26 2821. 19.46 6.2 .94 4097. 28.26 1 0. 0 .49 20 ORIGINAL IN MBGANEWTONS PER SO. METER

VOl 28 2665. 18.38 . 3 .89 3615. 24.93 = 3. 0 • 82 01 VOl 41 2808. 19.37 5.7 1.52 3782. 26.09 1.5 1.08 01

VOl 44A 2915. 20. 1 0 9.7 • 56 3915. 2^.00 5.1 1.21 01 VOl 4 4 B 2655. 1 8.31 -.1 .93 3700. 25.52 -.7 1.28 01 VOi 46 2517. 17.36 -5.3 • 60 3553. 24.51 = 4.6 1.17 01 VOl 48 2775. 19.14 4.4 2 • 1 4 X 4225. 29.14 13.4 1.19 01 VOi 49 2730. 18.82 2.7 .93 3742. 25.81 • 4 1.31 20 ORIGINAL IN MEG ANEWTONS PER SO. METER

VOI 50 2705. 1 8. 66 1 • 8 .90 3840. 26.48 3.1 • 94 01 VOl 51 2604. 17.96 -2.0 .90 3649. 25.17 = 2.1 1.49 01 VOl 52 2850. 19.66 7.3 1 . 80 4135. 28.52 11.0 1.17 01 VOl 53 2555. 17.62 = 3.8 1.36 3820. 26. 3* 2.5 .83 01 VOl 6 4 2520. 17.38 -5.2 .72 3475. 23.97 = 6.7 1.12 01

VO 1 56 2765. 1 9.07 4.1 1 .20 3900. 26.90 4.7 .87 01 VOl 58 2777. 19.15 4.5 1.15 3655. 25.21 = 1 .

9

1.66 2C ORIGINAL IN MBGANEWTONS PER SO. MBTER

VOl 59 2525. 17.41 -5.0 1 . 27 3540. 24.41 = 5.0 . 63 01 VOi 60 264C. 1 8.21 -.6 • 82 3555. 24.59 = 4.3 .76 01 VOl 66 271 3. 18.71 2.1 . 36 3802. 26.22 2.1 1.57 01

VOl 68 2834. 19. 54 6.7 2 • 7 1 X 371 0. 25.59 = .4 1.01 01 VOl 69 2451 . 1 6. 90 -7.7 .56 3546. 24.46 -4. 8 • 90 20 ORIGINAL IN MBGANEWTONS PER SO. METER

VOl 76 2645. 1 8. 24 -.5 .75 381 0. 26.28 2.3 • 84 01 VOl 77 2760. 19.03 3.9 1 .29 3545. 24.45 = 4.8 1.11 01 VOl 78 2715. 1 8. 72 2.2 2.36X 3005. 26.79 4.3 .83 01

VOl 84 2630. 18.14 -1 .

0

.51 3931 . 27.11 5.5 . 63 01 VOl 90 264C. 18.21 - .6 1 .01 3778. 26.06 1.4 .62 01 VOl 99 2696. 1 8. 60 1.5 1.67 3546. 24.46 = 4.0 .79 01

VO 2 0 0 2704. 1 8.65 1.8 1 .75 4001 . 27.60 7. 4 .76 Cl

VO 2 0 6 2550. 17.59 -4 .

0

. 86 3550. 24.55 = 4. 4 . 40 01

VO 2 07 * 2950. 20. 34 11.0 1.18 4310. 29.72 15.7 . 82 01

VO 208 2828. 19.51 6.4 .72 3989. 27.51 7.1 • 91 20 ORIGINAL IN MEG ANEW TONS PPR SO. METER

VO 2 1 3 2700. 1 8. 62 1.6 1.16 3673. 25.33 = 1.4 .67 01 VO 21 4 2725. 1 8.79 2.6 1.28 3823. 26.37 2.6 1.13 20 ORIGINAL IN MEGANEWTONS PER SO. METER

VO 2 2 0 X 2800. 19. 31 5.4 .72 01

VO 2 2 3 2725. 1 8. 79 2.6 1 .56 3720. 25.66 -.1 1.29 01 VO 2 2 4 2605. 1 7. 97 -2 .

0

2.36X 3757. 25.91 .9 1.01 0! VO 2 32 26 4C

.

1 8.21 -.6 1 .05 3780. 26.07 1 .5 .73 01

VO 2 33 2708. 1 8.68 1.9 . 56 3093. 26.85 4.5 • 98 01 VO 2 35 2575. 17.76 -3.1 .55 3805. 26.24 2.1 .97 01

VO 2 38 2637. 18.19 -.7 • 87 3925. 27.07 5. 4 1.77 01 VO 2 43 2557. 1 7. 63 -3.0 1 .01 3536. 24.39 = 5.1 1.08 01 VO 2 44 2539. 17. 51 = 4.4 1 .01 3513. 24.23 -5. 7 . 70 21 ORIGINAL IN XI LOG RAMS /SO . CENTIMETER

VO 2 454 * 2432. 16.77 -8.5 1 • 99X 3100. 21 .38 = 16.8 .73 01 V0245B « 2297. 15. 84 = 13.5 .98 3029. 20.89 = 1 8. 7 .71 01 V0250 2687. 1 8. 53 1 . 1 1.40 3400. 23.45 = 0. 7 1 . 97

X

01 2657. 18.32 - GR. MEAN - 3725. 25.69 5 TP ST DETERMINATIONS

1 24. . 85 • SD MEANS - 242. 1.67 60 LABORATORIES IN GRAND MEANS

72. . 50 - AVER SDR - 286. 1 .97 61 LABORATORIES REPORTING

PSI MEGAPA - UNIT PSI MEGAPA

6
MATERIAL

A83-A84

TENSILE STRENGTH

MATERIAL A81-A82 2657. PSI MATERIAL A83-A84 3725. PSI

MATERIAL A8I-A82

7
I NTERLAB6R ATORY PROGRAM AN EVALUATION 0P RUBBER

REPORT 35 - 1 ULTIMATE ELONGATION - PBRCBNT J ANU ARY 1978 MATERIAL AS! -A82 MATBRIAL A83-A84 COMMERCIAL TIRE TREAD SBR

LAB MEAN % RBL MEAN % RBL VAR CODE F * DEV SDR % DEV SDR C9DB INSTRUMENT. UNIT. 8R OTHER VARIATION

V0076 625. .6 1.20 650 • -4.6 1 .51 01 V0078 590. -5.0 .93 650. -4.6 1 .81 01 V0081 580. -6.7 1.51 660. -3.1 .77 01 V9083 582. -6.3 .65 677. -.6 .73 01

VO 0 84 610. -1.8 .41 660. -.2 .82 01 V0085 630. 1.4 .62 710. 4.2 1.43 01 V0087 632. 1.7 1.80 662. = 2.9 1.59 01 VO 0 88 630. 1.4 1.34 665. -2.4 .94 01 VOC 9c * 565. -9.1 1.13 615. -9.7 1.17 01 V0995 630. 1.4 1.15 695. 2.C 1.49 01 V0096 621. .0 1.27 650. -4.6 1 .22 01 VO 100 615. -1.0 .92 700. 2.7 .49 01 V01 11 643. 3.5 1.28 726. 6.6 .77 01 V01 1 7 635. 2.2 .85 720. 5.7 1.15 01 VO 12 0 * 640. 3.0 .71 635. -6.8 1.14 01

V01 22 640. 3.0 1.07 700. 2.7 1 . 89 01 VO 1 2 3 625. .6 1.21 690. 1.3 .47 01 V01 26 641 . 3.2 .81 722. 6.0 .46 01 V01 28 61 0. -1.8 1.51 675. -.9 .67 01 VO 141 635. 2.2 1.29 670. -1 .’ .89 01

VO 1 44

A

640. 3.0 .75 690. 1.3 1.14 01 VG1 4 4B 620. -.2 .95 695. 2.0 .81 01 VO 146 645. 3.8 .85 705. 3.5 1 .32 01 V01 43 625. .6 1.13 700. 2.7 .55 01 V01 49 585. -5.9 .98 662. -2.8 .74 01

VO 1 50 X 625. .6 .93 785. 15.2 1.27 01 V01 51 655. 5.4 1.64 735. 7.9 2 . 01 X 01 VO 1 52 61 c. -1.4 1.27 685. .5 1.16 01 V01 53 61 2. -1.4 1.46 700. 2.7 .78 01 V01 54 595. -4.2 .59 655. -3.9 1.18 01

V01 56 600. -3.4 1.50 650. -4.6 .60 01

VO 1 58 * 685. 10.2 1.01 700. 2.7 1 .71 01 V01 59 615. -1.0 1.45 665. -2.4 .76 01 V01 60 61 0. -1.8 .89 650. -4.6 .63 01 V01 66 620. -.2 .26 700. 2.7 1 .76 01

V01 68 630. 1.4 2.41 X 645. -5.3 .83 01 V01 69 585. -5.9 .45 660. -3.1 .87 01 V01 76 615. -1.0 .93 670. -1.7 . 88 01 VO 1 77 660. 6.2 .91 675. -.9 1.19 01 V01 76 628. 1.1 2.40X 691 . 1.4 . 76 01

V01 84 620. -.2 .63 675. -.9 .87 01 V01 90 645. 3.8 .57 700. 2.7 .65 01 V01 99 660. 6.2 2. 1 0 X 675. -.9 1 .07 01 VO 2 0 0 615. -l .0 1.27 700. 2.7 . 49 01 V0206 640. 3.0 1.06 680. -.2 1.13 01 V0207 615. -1.0 .60 7C0. 2.7 .45 01 VO 2 08 600. -3.4 .49 660. -3.1 .78 01 VO 2 1 3 641 . 3.2 1.22 684. .4 . 79 01 V021 4 640. 3.0 1.33 715. 4.9 1 .52 01 V0220 X 655. 6.4 .87 01 V0223 620. -.2 1.22 630. -.2 1.37 01 VO 2 2 4 • 620. -.2 2.64X 735. 7.9 1 .04 01 VO 2 32 615. -1 .0 .81 690. 1.3 .90 01 V0233 600. -3.4 .49 660. -3.1 .82 01 VO 2 35 585. -5.9 .58 655. -3.9 .58 01 V0238 625. .6 .73 688. .9 1 .63 01 VO 2 4 3 625. .6 .72 685. .S .88 01 VO 2 4 4 610. -1.8 .71 680. -.2 .70 01 VOc 45

A

615. -1 .0 1 . 90 670. -1.7 1.13 01 VO2450 630. 1.4 1.00 705. 3.5 1 .08 01 V0250 X 665. 7.0 .21 635. -6.8 1 • 99X 01

621. - OR . MBAN • 681 . 5 TEST DETERMINATIONS

22. • SD MEANS - 25. 58 LABORATORIES IN GRAND MEANS

17. - AVER SDR - 32. 61 LABORATORIES REPORTING

• - UNIT %

8
MATERIAL

A83-A84

ULTIMATE ELONGATION

MATERIAL A81-A82 621. X MATERIAL A83-A84 681. X

9
INTERLABORATORY PROGRAM O N EVALUATION 6F RUBBER

REPORT 35 «= X STRESS AT 300* BL0NGATI0N = POUNDS PER SOUARS INCH JANUARY 1973 MATERIAL A01-A82 MATERIAL A83-A84 COMMERCIAL TIRE TREAD SBR

LAB MEAN MEAN % RBL MEAN MEAN % BEL VAB CODE F P3T MEGAPA DBV SDR PSI MEGAPA DBV SDB CADE INSTBUMENT, 0N1T, 8B 8TKEB VABIATIGN

V0076 1175. 8.103 2.4 • 67 1040. 7.172 2.6 .65 01 VO 0 7 8 1179. 8.1 31 2.7 1.10 1031. 7.114 1.8 1.10 01 V0081 11 25. 7.759 •=2.0 .75 1 062. 7.328 4.8 .83 01 VO 0 83 1162. 8.017 1.3 • 70 1 050. 7.241 3. 6 .85 01 VO 0 84 1165. 8.034 1.5 .60 1025. 7. 069 1 .1 . 70 01

VO 0 85 1131. 7.802 “1 .4 .39 972. 6.702 = 4.1 .91 20 ORIGINAL IN MBGANEWTONS PER SQ. METER

VO 087 1155. 7.966 .6 .90 1 060. 7.310 4. 6 .96 01 VO 0 88 1070. 7.379 -6.8 2.06X 1030. 7.103 1.6 1.69 01 VO 092 1285. 0. 862 12.0 1.23 1 1 35. 7.828 12.0 l.OS 01 VO 0 95 1175. 8.103 2.4 1.13 1090. 7.517 7. 6 .93 01

VO 096 1158. 7.990 m o 1 .09 1 020. 7.030 . 7 . 83 01 V01 00 il AO. 7.862 -.7 .98 990. 6.828 -2.3 1.26 01 VOlll 1165. 8.034 1.5 .67 1035. 7.138 2.1 .66 01 V01 17 1120. 7.724 -2.4 1.36 965. 6.655 -4.8 1.61 01 VOl 20 1118. 7.714 ° 2 • 6 .56 1036. 7.148 2.3 1 . A 9 01

VOl 22 X 862. 5.948 = 24 .

9

1 . 25 825. 5.690 = 10.5 1.03 01 VOl 23 1195. 8.241 4. 1 .87 1 050. 7.241 3. 6 1.01 01 VOl Z6 11 A9. 7.927 • 1 1 . 00 975. 6.727 = 3. 8 . 7 A 20 ORIGINAL IN MEGANEWTONS PER SQ. METER

VOl 28 1190. 8.207 3.7 .55 1040. 7.172 2.6 1.12 01 VO 141 1229. 8.476 7.1 • 43 1 037. 7.152 2. 3 . A 9 01

VOl *4

A

11 AO. 7.862 -.7 1.39 950. 6.552 = 6. 3 .76 01 VO 1 44 B 11 AO. 7.862 “.7 1.72 960. 6.621 -5.3 .85 01 VOl 46 * 979. 6.752 = 14.7 1.16 91 0. 6.276 -10.2 1.16 01 VOl 48 1200. 0.276 4.5 .43 1087. 7.500 7.3 1.08 01 VOl 49 1198. 8.262 4.4 .70 1053. 7.262 3.9 (VI o 20 ORIGINAL IN MEGANEVT0NS PER SO. METER

VOl 5C 1125. 7.759 -2.0 .39 965. 6.655 -4.8 .53 01 VOl 51 1105. 7.621 -3.7 2. 34X 961 . 6.631 -5.1 2. 37X 01 VOl 52 1210. 8.345 5.4 . 38 1090. 7.51 7 7.6 .68 01 VOl 53 1120. 7.728 -2.4 1.78 961. 6.628 = 5.2 1.74 01 VOl 54 1160. 8.000 1 • 1 • 47 1 035. 7.138 2. 1 .81 01

VOl 56 1 225. 8.448 6.7 1.49 1 065. 7.345 5.1 1.18 01 VOl 58 1073. 7.402 -6.5 .98 943. 6.502 -7.0 . 32 20 ORIGINAL IN MBGANBWTONS PER SO. METER

VOl 59 1110. 7.655 -3.3 1.00 1020. 7.034 • 6 1.17 01 VOl 60 1175. 8.103 2.4 .93 1070. 7.379 5. 6 1.13 01 VOl 66 11 A8. 7.921 • 1 .70 973. 6.710 -4.0 .59 01

VOl 68 1187. 8.186 3.4 1 . 30 1 013. 6.990 .0 .90 01 VOl 69 1131 . 7.802 -1.4 1.13 1008. 6.952 -.5 1.17 20 ORIGINAL IN MB 3 A NEW TONS PER SO. MBTER

VOl 76 11 55. 7.966 • 6 1.75 985. 6.793 -2. 8 1.39 01 VOl 77 1065. 7.345 -7.2 .74 940. 6. 483 -7.2 1.20 01 VOl 7 0 1135. 7.828 -1 . 1 .74 985. 6.793 -2.8 .63 01

VOl 84 1067. 7.362 -7.0 .84 1025. 7.069 1.1 . 47 01 VOl 90 1153. 7.955 .5 1.55 976. 6.731 -3. 7 1.04 01 VO l 99 11 23. 7.748 -2.1 1.77 1 043. 7.197 3. 0 1 • 86 01 VO 2 00 11 07. 7.638 -3.5 .94 985. 6.797 -2.8 • 54 01 VO 20 6 1110. 7.655 -3.3 1.37 1 020. 7.034 • 6 1.62 01

VO 2 07 * 1300. 8.966 13.3 1 • 81 1 1 95. 8.241 1 7.9 1.09 01 VO 2 0 0 1226. 8.452 6.8 2.37X 1 1 39. 7.052 12.3 2. 1 1 X 20 ORIGINAL IN MBG ANBWT0NS PER SO. METER

VO 2 1 3 11 AO. 7.866 -.6 1.65 977. 6.741 -3.5 1.44 01

VO 21 4 1102. 7.602 -4.0 .56 914. 6. 302 -9. 8 1.00 20 ORIGINAL IN MEG A NEW TONS PER SO. METFR

VO 2 20 11 50. 7.931 • 2 .75 1 000. 6.897 = 1 . 3 . 70 01

VO 2 23 1220. 8.414 6.3 .43 1025. 7.069 1.1 .97 01 VO 224 1180. 6.138 2.8 1 .43 1000. 6. 897 -1.3 1.08 01 VO 2 32 11 55. 7.966 • 6 1.16 1002. 6.91 4 -1 . 1 • 89 01 VO 2 33 1212. 8.362 5.6 1.03 1067. 7.359 5.3 1.10 01 VO 2 3 5 1215. 8.379 5.9 • 78 1110. 7.655 9. 5 1.10 01

VO 2 3 8 1112. 7.672 -3.1 1.07 975. 6.724 -3.8 .63 01

VO 2 43 101 3. 6.9 86 -11.7 .56 889. 6.131 -12. 3 • 72 01

VO 2 4 4 1088. 7.504 -5.2 1.50 981. 6.768 -3.2 1 .21 21 ORIGINAL IN El L 03 RAM S/S

Q

. CBNTI METE B VO 2 4 5 A 959. 6.617 -16.4 1 . 54 860. 5.934 -15.1 1.35 01 V0245B X 925. 6.379 -19.4 1 .04 710. 4.955 -29.1 1.75 01

VO 2 5 0 1212. 8.362 5.6 .97 987. 6. 81 0 -2. 6 .82 01

11 A8. 7.916 - GR. MEAN - 1013. 6.989 5 TBST DETERMINATIONS

62. .429 - SD MEANS - 61. • 41 9 59 LABORATORIES IN GRAND MEANS

26. .178 - AVER SDR - 30. .210 61 LABORATORIES REPORTING

PSI MEGAPA - UNIT PSI MEGAPA

10
MATER

I

RL

A83-A84

STRESS AT 300 X ELONGATION

MATERIAL A8 1 -A82 1148. PS I MATERIAL A83-A84 1013- PSI

11

REPORT 35 INTERLABORATORY PROGRAM ON EVALUATION OP RUBB3R

- 2 JANUARY 1973

HARDNESS

NOTES

Materials A81 and A82 were sheets of the same vulcanized rubber. Similarly, materials A83 and A84 were alike.

V100 results were obtained at NBS using ASTM D2240. V200 results were obtained at NBS using ASTM D1415.

Four of the 26 participants reporting used ASTM D1415 (Wallace)

for the hardness determintation. All others used ASTM D2240

(Type A Durometer).

SUMMARY OF ANALYSES

LABS LABS STD DBVIATION9 PROPERTY MATERIAL INCL OMIT GR. MEAN LABS SHEBTS RE PL UNITS

HARDNESS A01-A82 26 0 55.26 1.72 .1 8 .40 I RHD A03-A84 26 0 56.1* 1.62 .20 . 41 I RHD

PRECISION OF METHODS

RE PL RBPL ABSOLUTE PERCENT PROPERTY MATERIAL CRP ASTM GR. MEAN REPEAT REPR6D UNITS REPBAT REPROD HARDNESS A8I-A82 5 5 56.26 1.11 *.77 I RHD 2.0 8.5 A83-A84 5 5 56.14 1.13 5.0* I RHD 2.0 9.0

13
REPORT 35 “ 2

I NTERL AB6RAT0RY PROGRAM ON EVALUATION OP RUBBER HARDNESS “ I R HD JANUARY 1978 MATERIAL A81-A62 MATERIAL A83-A84 COMMERCIAL TIRE TREAD SBR

LAB MEAN % REL MEAN %

CfJDE F I RHD DEV SDR I RHD DEV

VO 0 81 57.00 1.3 1.25 57.00 1.5

VO 0 8 A 57.50 2.2 .56 58.00 3.3

VO 085 55.35 = 1 .6 . 48 53.80 “4.2

VO 0 87 60.00 6.7 .56 60. 00 6.9

VO 0 88 55.50 = 1 .3 2.1 OX 57. 00 1.5 V0C92 53.50 -4.9 1 . 37 54.50 -2.9

V0095 55.50 -1.3 1.68 53.50 -4.7

V01 00 55. 50 -1.3 .69 56.50 .6 V01 1 1 57.50 2.2 .69 58.00 3.3

VOX 22 56.00 - . 5 .62 55.25 “1.6

VOX 28 54.50 “3.1 1.37 55.50 “1 .1 VOX 4 X 53. CO -5.8 1.25 53.00 -5.6

VOX 44 59. 50 £.8 1.61 58.50 4.2

VOX 4 4B 59. 00 4.9 1.12 58.50 4.2

VOX 68 57.25 1 .8 .62 57.25 2 • C

VOX 69 58.00 3.1 .56 58.00 3.3

VOX 76 56. 5C .4 1.57 55.50 “1 .1 VOX 90 56. CO “.S 1.45 55.00 -.3

VO 2 00 54.00 -4.0 .51 53.25 “5.1

VO 2 08 55.30 “1.7 1.28 54.20 -3.5

VO 2 X 4 55.55 “1 .3 2 . 9 1 X 55. X5 “1 .8

VO 2 24 54.50 -3.1 1.25 55.50 “1.1

VO 2 32 57.00 1 .3 .CO 57.50 2.4

VO 2 35 56.25 “.0 .28 55.25 “1.6

VO 2 43 56.50 .4 1.12 55.00 “.3

VO 244 56.50 .4 1.12 57.00 1.5 56.26 - GR . MEAN - 55.X 4

X .72 * SD MEANS - X • 6 2 .40 - AVER SDP “ .41

I RHD - UNIT I RHD

REL VAR SDR C9DB INSTRUMENT, UNIT, OR OTHER VARIATION

1.54 01 1.34 01

. 59 01 .67 01 1.10 01 1.10 01 1.22 01 1.22 01 1.10 01 .95 01 1.22 01 .67 01 2.41X 01 1.10 01

. 77 01

.55 01 1.34 01 1.22 01 .53 01 .67 01 1.12 01 1.22 01 1.22 01

. 77 01 .67 01 1.10 01

5 TEST DETERMINATIONS

26 LABORATORIES IN GRAND MEANS

26 LABORATORIES REPORTING

14
MATERIAL

A83-A84

HARDNESS

MATERIAL A81-A82 56.26 IRHO MATERIAL A83-A84 56.14 IRHD

15

REPORT 3f • * INTERLABORATORT PR0ORAM ON EVALUATION OP BUBBEB PBBRUABY 1978

MOONEY VISCOSITY

NOTES

Materials R81 and R82 were the same rubber. Similarly, materials

R83 and R84 were the same rubber. No sample preparation was required

fpr materials R81 and R82 whereas, mill massing was required for materials R83 and R84.

V100 results were obtained at NBS on the manually closed viscometer

used for determining the Mooney viscosities of the standard rubbers.

SUMMARY OP ANALYSES

LABS LABS STD DEVIATIONS

PROPERTY MATERIAL INCL OMIT OB. MEAN LABS SHEETS RE PL UNITS

MOONEY R81-R82 40 3 67.77 1.84 .17 .35 ML ISC0SITY R83-R84 40 3 63.16 2.90 .53 .45 ML

PRECISION OF METHODS

PROPERTY MATERIAL

REPL CRPREPL

A STM GR. MEAN MOONEY R8I-R82 3 3 67.77 VISCOSITY R83-R84 3 3 63.1 6

ABSOLUTE PERCENT

RBPEAT KEPROD UNITS REPEAT REPBOD

.97 5.09 ML 1.4 7.5 1.25 8.04 ML 2.0 12.7

17
REPORT

LAB

COD 3

VO 0 77

VO 0 78

VO 075

VO 0 80

VO 0 83 V008S

V0090

VO 0 92 V0095

V01 00

V01 1 1 V01 1 7 V01 22

V01 28

V01 94

V01 46

VOI 48

V01 49

VOS SO

VOI 56

VOI 66

VOI 69

VO 1 7 7 VOI 78

VOI 82

VOI 90 V0206

V0207

VO 2 0 8 V021

1

V0213

VO 21 4 VO 217

VO 21 8 V0220

V0221 V0223

VO 2 30 V02 36

VO 2 38

VO 2 4 4 VO 2 50 V0251

35 = 4

I NTERL AB0RATORY PROGRAM ON EVALUATION OF RUBBER

MOONEY VISCOSITY - ML FEBRUARY 1978

F

X

X

X

4

MATERIAL R81 -R82 MATBRIAL R63-R84

BUTYL RUBBER SBR MEAN % RBL MEAN • REL

ML DBV SDR ML DBV SDR

66.00 -2.6 .72 56.50 -10.5 .87

65. 90 = 2.8 1.62 50.50 = 20.0 .96 76.95 13.5 .82 68.45 8.4 4.21X

70. 4 5 4.0 1.37 55.95 = 11.4 2.32

69.25 2.2 .41 64.25 1 .7 .64

67. 60 -.3 .16 62.10 -1.7 1 .34 69.15 2.0 .66 66. 00 4.5 3.S7X

68.00 .3 1.64 66. 00 4.5 1.28

66.00 = 2.6 1.83 62.75 -.7 1.43

68.25 .7 .36 62.50 -1.0 .00 65.10 “3.9 .65 59.30 -6.1 .34

6 T . 00 -1.1 1.12 62.25 = 1.4 1 .40

64. 75 -4.5 1.12 62. 00 = 1 .8 .96

66. 00 -2.6 .82 63.50 .5 .64 69.70 2.8 1.23 65.80 4.2 .39 70.00 3.3 2.46X 67.50 6.9 .32 73.10 7.9 .87 69.50 10.0 1 .16 70.05 3.4 .92 64.85 2.7 .65 69.90 3.1 . 38 60.95 = 3.5 1 .62

66. OC = 2.6 2.17 61.25 = 3.0 .85

67. 00 = 1.1 1.91 66.25 4.9 1.84

70.00 3. 3 1.64 62.50 -1 .0 1 .28

64. 05 = 5.5 1.17 63.40 .4 . 36 67.30 -.7 .30 62.80 -.6 .50 67.75 = . 0 .41 63.25 .1 1.17

68.15 .6 .38 57.90 -8.3 .65 66.25 = 2.2 1.23 60.00 -5.0 2.25

67.40 -.5 1.47 64.15 1 .6 .89 ^0.00 3.3 1 .64 65.50 3.7 1 .28 68.00 .3 .41 62.00 = 1 .8 .00 66.25 = 2.2 .00 60.25 = 4.6 .32 65.25 = 3.7 1.50 64.00 1.3 2.58X

68. 25 .7 .41 66. 00 4.5 .00 67.75 = . 0 .41 63.00 -.3 . 64 69.65 2.8 1.08 66.60 5.4 1 . 33 68.60 1.2 .76 63.40 .4 1 .10 67.75 -.0 . 41 69.25 9.6 .64 66.35 = 2.1 1.80 56.90 -9.9 .96 70.00 3.3 . 00 62.50 = 1 .0 1 .28

66. 00 -2.6 .82 60.50 -4.2 3. 56X 68.00 .3 3.06X 64.00 1 .3 1.11

68. CO .3 1.64 62.00 -1.8 .64 67.30 -.7 1 • 57 63.35 .3 1 .84 67.77 • OR . MBAN - 63. 1 6

1 . 84 • SD MEANS * 2.90

.35 • AVER SDR - .45

ML - UNIT ML

VAR CODB INSTRUMENT. UNIT. OR OTHER VARIATION

01

01

0101

01

0101

01

0101

01

0101

01

01

01

0101

0101

01

01

0101

01

0101

01

01

01

01

0101

01

01

0101

01

0101

01

01

01

3 TEST DETERMINATIONS

40 LABORATORIES IN GRAND MB4NS

43 LABORATORIES REPORTING

IS
74

72

70

68

66

64

62

60

58

56

54

52

M00NEY VISCOSITY

58 60 64 66 68 70 72 74 76

MATERIAL R81-R82

62

RBPORT 35 5 INTERLABORATORY PROGRAM ON E VALUATI ON OP RUBBER

MARCH 1978

VULCANIZATION CHARACTERISTICS USING OSCILLATING DISK CURE METER

NOTES

Materials W81 and W82 werethe same rubber formulation. Similarly, materials W83 and W84 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.

SUMMARY OP ANALYSES

LABS LABS STD DEVIATIONS

PROPERTY MATERIAL I NCL OMIT GR. MEAN LABS SHBETS REPL UNITS

SCORCH W81-W82 37 2 3.90 .27 .03 .06 MINUTSS

TIME W83-W84 37 2 3.44 .27 .02 .06 MINUTES

CURE TIME W81-W82 36 3 6. £8 .33 .03 .08 MINUTES

( £0% MH ) W83-W84 36 3 7.31 .46 .05 .06 MINUTES

CURE TIMB W81-W82 36 3 10.53 .51 .05 .13 MINUTES

( 90% MH ) W83-W84 36 3 1 4.83 .96 .09 .13 MINUTES

MINIMUM W81-W82 33 6 5.11 .37 .03 .07 POUND-INCHBS

TORQUE W83-W84 33 6 6.44 .41 .04 .07 POUND-INCHES

MINIMUM W81 -W82 33 6 .5778 . 0416 .0038 .0075 NEWTON-MBTERS

TORQUE W83-W84 33 6 .7275 . 046 8 .0046 . 0084 NEWT0N-MBTERS

MAXIMUM W81-W82 38 1 24. 09 1 .04 .08 .16 POUND-INCHES

TORQUE W83-W84 38 1 30.70 1.22 .18 .09 POUND-INCHES

MAXIMUM W81-W82 38 I 2.7217 .1173 .0088 .0177 NEWTON- ME TBRS TORQUE W83-W84 38 1 3. 4684 .1378 .0203 .0105 NEWTON- METERS

PROPERTY MATERIAL

REPL

CRP

REPL ASTM

PRECISION OP

OR. MBAN

METHODS

ABSOLUTE RBPEAT RBP ROD UNITS PERCENT RBPEAT REPROD SCORCH W81 -W82 3 3 3.90 .16 .75 MINUTE 4.2 19.1 TIMB W83-W84 3 3 3.44 .17 .75 MINUTE 4.9 21.9

CURE TIME W81-W82 3 3 6.2 8 .21 . 92 MINUTB 3.4 14.7

( 50% MH

)

W83-W84 3 3 7.31 .16 1 .27 MINUTE 2.1 17.3

CURE TIME W81-W82 3 3 10.53 .37 1 .42 MINUTB 3.5 13.4

( 90% MH ) W83-W84 3 3 14.83 .36 2.67 MINUTP 2.4 18.0

MINIMUM W81-W82 3 3 5.11 .18 1 .02 LB-IN. 3. 6 19.9 TORQUE W83-W84 3 3 6.44 .21 1.15 LB-IN. 3.2 17.8 MINIMUM W81-W82 3 3 .5778 .0207 . 1 1 SI N-M 3.6 19.9 TORQUE W83-W84 3 3 . 7275 .0232 .1296 N-M 3.2 17.3

MAXIMUM W81-W82 3 3 24.09 .43 2.87 LB-IN. 1 .

8

11.9 TORQUE W83-W84 3 3 30.70 .26 3.38 LB-IN. .8 11.0 MAXIMUM W81-W82 3 3 2.7217 .0491 .3248 N-M 1.8 11.9 TORQUE W83-W84 3 3 3.4684 .0292 .3816 N-M . 8 11.0

21
INTERL.ABeRA.T0R¥ PROGRAM 0N EVALUATI0N 0F RUBBER

REPORT 35 “ 5 SCORCH TIME - MINUTES MARCH 1978 MATERIAL W81 “ W82 MATERIAL ff S3-84

COMMERCIAL TIRE TRBAD SBR

LAB MEAN % REL MBAN * REL VAR CODE F MINUTE DBV SDR MINUTB DBV SDR CODE INSTRUMENT. UNIT, 9R 0THBR VARIATION

VO 0 74 A 3 • 51 “10.0 3. 24X 2.87 »16.4 .00 01 V007AB 3 • 77 “3.2 2.22 3.40 -1.8 1 .02 01 VO 0 77 3.90 .0 1.61 3.42 -.4 1 .40 01

VO 0 70 4.30 10.3 .49 3.70 7.6 .94 01 VO 07 9 4.10 5.1 3 • 1 0 X 3.82 11.2 .00 01 V0083 4.25 9.0 .98 3.70 7.6 2 • SOX 01 VO 085 3. 62 “7.1 .98 2.95 = 14.2 .47 01 VO 090 4.25 9.0 .49 3.72 6.3 . 38 01 VO 0 92 3.77 “3.2 .00 3.40 -1.8 1.18 01 V0C95 * 4.40 12.8 2.25 3.60 4.7 1 .89 01

V01 00 4.00 2.6 .49 3.30 = 4.1 .94 01 VO 117 3.75 “3.8 1.34 3.25 = 5.5 .00 01 V01 20 4.11 5.5 3.04X 3.52 2.3 3. 71 X 01 VOi 2 P. 3.55 “9.0 .85 3.00 = 12.8 1 .29 01 VOi 28 4.20 7.7 . 85 3.65 6.1 .47 01

VOI 44 3.67 “5.9 .34 3. 29 = 4.4 .62 01 VOI 46 4.00 2.6 1.22 3.50 1.7 .94 01 VOI 48 X 1.50 “61.5 .49 1.30 = 62.2 .24 01 VOI 49 3.97 1.9 1.31 3.50 1.7 .47 01 VOi 50 3.45 “1 i . 5 .98 3.30 = 4.1 2.06 01

VOI 52 3. 80 “2.6 .00 3.35 -2.6 .00 01 VOI 54 3.95 1 .3 .49 3.45 .3 .82 01 VOi 56 3.95 1.3 .49 3.50 1 .7 1 .49 01 VOi 58 3.80 “2.6 1.22 3.27 = 4.8 .94 01 VOi 6i 3. 70 -5.1 .98 3.30 = 4.1 .47 01

VOI 66 4.00 2.6 .98 3.55 3.2 .94 01 VOI 69 3.65 “6.4 .98 3.25 = 5.5 .82 01 VOi 82 3.70 -5.1 • 24 3.30 = 4.1 .65 01

VO 2 07 * 4. 50 15.4 .85 4.20 22.1 1 .42 01

VO 2 08 3.75 -3.7 1.39 3.29 = 4.4 .71 01 V0211 3.95 1.3 .98 3.55 3.2 . 94 01 V0 21 2 3.62 “7.1 1.96 3.47 1 .0 1 .08 01 VO 2 1 a X .90 -76.9 2.67X • 80 -76.7 1 .89 01

V0 21 7 4.15 6.4 2.94X 4.00 16.3 . 00 0! VO 21 8 3.95 1.3 .49 3.50 1 .7 1.29 01 V0220 3. 30 -1 5.4 2.61 X 2.95 “14.2 1 .29 01 V0221 4.00 2.6 .49 3.60 4.7 1 .42 01 VO 2 38 4.05 3.8 2 • 61 X 3.30 = 4.1 .00 01

VO 2 43 3. 87 “.6 1 .06 3.53 2.6 .63 01 3.90 - OR . MEAN - 3.44 3 TEST DETERMINATIONS

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

.06 - AVER SDR - .06 39 LABORATORIES REPORTING

MINUTE • UNIT MINUTE

22
MATERIAL

N83-N84

SCORCH TIME

MATERIAL W81-W82 3-90 MINUTE MATERIAL W83-W84 3-44 MINUTE

23
REPORT

LAB CODE

V0074A

V0074B

VO 077

VO 0 78

VO 079 V0083

VO 0 85 VC090

VO 092

VC 0 95

VO! 00

VO 117

V01 20

V01 22

VOI 28

VOi 44

V01 4 6 VOi 48

VOI 49

VOI 50

VOI 52

VOI 54

VOi 56

VOI 58

VO 1 6i

VOX 66

VOi 69

VOi 82 V0207

VO 2 0 8

VO 2 i 1 VO 2 i 3 VO 21 4 VO 2 X 7 V02 1 8 V0220

VO 2 2 X VO 2 38

VO 2 43

INTERLABORATORY PROGRAM 0N EVALUATION OF RUBBBR CURB TIME (50% MB) - MINUTBS MARCH 1978 MATERIAL W81-W82 COMMERCIAL TIRE TREAD MATBRIAL 983-984

SBR MEAN % BEL KEAN % BEL VAB MINUTE DBV SDK MINUTE DBV SDB CODE

5.71 -9.1 2.30 6.11 -16.4 2.39X 01 6.35 1.1 1.69 7.42 1.6 .93 01 6.39 1.7 1.25 7.50 2.6 1 .25 01 23.75 99.9 1.52 29.55 99.9 1.02 01 6.60 5.1 2.66Z 8.32 13.9 .77 01 6.90 9.9 2.03 7.95 8.8 3. 89X 01 6.05 -3.7 1.51 6.47 -11.4 .26 01 6.73 7.2 .23 7.70 5.3 .51 01 6.25 -.5 .19 7.27 -.5 .51 01 6.45 2.7 . 36 7.20 -1.5 1.35 01 6,30 .3 1.52 7.15 -2.2 1.02 01 5.90 -6.1 .66 7.10 -2.9 .51 01 6.51 3.7 3.41X 7.64 4.5 1 0 • 51

X

01 5.95 -5.3 .76 6.95 -4.9 1 .53 01 6.35 1.1 .38 7.50 2.6 .51 01

5.91 -5.8 .87 6.96 -4.8 1 .26 01

6. 50 3.5 1.04 7.45 1.9 1 .02 01 15.35 99.9 3.81X 19.27 99.9 1 .14 01 6.55 4.3 2.01 7.62 4.3 1 .02 01 5.50 -12.4 2.03 6.70 -8.3 2. 85X 01 6.20 = 1.3 .76 7.20 -1.5 .00 01 6.40 1.9 .38 7.42 1 .6 .51 01

6. 40 1.9 .00 7.40 1.2 .89 01 6.02 -4.1 .95 6.92 -5.3 1 .02 01 6.10 -2.9 .76 6.90 -5.6 1 .02 01

6. 50 3.5 .76 7.50 2.6 1 .40 01 6.00 -4.5 1.14 7.10 -2.9 2.85X 01 5.97 -4.9 .33 7.05 -3.6 1 .02 01 6.25 -.5 3. 31 X 7.90 8.1 4. SOX 01 6.43 2.4 .59 7.26 -.6 1 .07 01 6.25 -.5 .76 7.20 -1.5 1.91 01 6.50 3.5 . 38 7.65 4.7 1 .14 01 16.95 99.9 .38 20.70 99.9 8.69X 01 6.95 10.7 1.14 8.1 0 10.8 1 .02 01 6.4C 1.9 1.04 7.55 3.3 1 .40 01 5.50 -12.4 1.14 6.45 -11.8 1 .40 01 6.50 3.5 .38 7.60 4.0 1 .40 01 6.50 3.5 1.71 7.60 4.0 .51 01 6.30 .3 • 9S 7.30 -.1 .82 01 6.28 - OB . MEAN • 7.31

.33 - SD MEANS - .46

.08 - AVER SDR - .06 1 MINUTE - UNIT MINUTB

INSTRUMENT, UNIT, OR OTHER VARIATION

3 TEST DBTBRMINATIONS

36 LABORATORIES IN GRAND MEANS

39 LABORATORIES REPORTING

24
MATERIAL

W83-W84

CURE TIME ( 50X MH )

MATERIAL W81-W82 6-28 MINUTE MATERIAL W83-W84 7-31 MINUTE

25
I NTERLABORAT0RT PROGRAM ON EVALUATION OF ROBBER

RBP6RT 35 - 5 CURB TIMB (90% MH) • MINUTES MARCB 1978 MATERIAL *81 -W82 MATBBIAL W83-•84 COMMERCIAL TIRE TREAD SBR LAB MEAN • REL MEAN % REL VAR C9DE P MINUTE DEV SDR MINUTE DEV SDR C0DB INSTRUMENT. UNIT. OR 0THB8 VARIATION

V0074A 9.70 -7.9 6.39X 13.77 -7.1 1 .75 01 V0074B 10.87 3.3 1.50 15.00 1.2 .22 01 V0077 10.56 .3 .72 IS. 12 2.0 1 . 30 01 V0078 X 12. 45 18.3 .43 16.00 7.9 .39 01 vootq * 10.65 1.2 3.24X 16.75 13.0 1.12 01

VO 0 83 11.40 8.3 3.68X 16.30 9.9 2.83X 01 VO 0 85 9.85 -6.4 1.31 13.12 = 11.5 .75 01 V0050 11.25 6.9 .92 15.37 3.7 .99 01 V0092 10.31 °2.C .66 1 4.50 -2.2 1.12 01 V0095 10.40 -1.2 .99 14.00 -5.6 .67 01

VOI 00 10.45 -.7 1.62 14.30 -3.5 .45 01 VOI 17 10.35 -1.7 .99 14.60 -1 .5 1 .57 01 V01 20 11.20 6.4 2.60X 16.18 9.2 13.57X 01

VO 1 22 10. 55 .2 .37 15.40 3.9 1 .79 01 VCi 2 8 10.20 -3.1 .43 15.05 1.5 .22 01

VOi 44 9.98 -5.2 .38 1 3.85 -6.6 .29 01 V01 4 6 10.65 1 .2 1.50 1 4.75 -.5 .00 01 VOI 48 X 23. 85 99.9 3.34X 29.41 98.4 .25 01 VOI 49 11.10 5.4 .96 15.57 5.1 1 .25 01 VOI 50 9.65 -8.3 1.83 13.15 -11.3 2.02 01

VOI 52 10.50 -.3 .21 14.50 -2.2 .00 01

VOI 54 10. 90 3.5 .89 15.70 5.9 .79 01 VOi 5 5 10.57 .4 .19 14.77 -.3 .92 01 VOi 58 10.17 -3.4 1.26 14.20 -4.2 .78 01 VOI 61 10.3C -2.2 .43 1 3. 80 -6.9 1 .20 01

VOI 66 10. 80 2.6 1.17 1 4. 95 .8 .90 01 VOI 69 9.95 -5.5 1.55 14.50 -2.2 1.43 01 VOi 82 10.00 -5.0 1.02 14.27 -3.7 .49 01 V0207 11.60 10.2 1.72 17.25 16.4 1 .40 01 V0208 • 10.74 2.1 2.43X 13.47 -9.1 3. 78X 01 V0211 10.45 -.7 .43 14.50 -2.2 .90 01

VO 2 1 3 10.37 -1.5 .96 1 5.37 3.7 .97 01 VO 2 i 4 X 24. 25 99.9 . 21 29.95 99.9 1.12 01 VO 2 1 7 10.90 3.5 1.71 15.25 2.9 .00 01 VO 216 10.95 4.0 1.41 1 5.45 4.2 1.12 01 V0220 * 9.25 -12.1 1.41 13.43 -9.3 . 82 01 V0221 10. 85 3.1 .00 15.40 3.9 .45 01

VO 2 38 11.00 4.5 1.07 15.62 5.4 1 .53 01

VO 243 10.55 .3 .38 14.43 -2.6 . 80 01

10. 53 • OR . MEAN 14.83 3 TEST DETERMINATIONS

.51 - SD MEANS - .96 36 LABORATORIES IN GRAND MEANS

.13 • AVBfi SDR " .13 39 LABORATORIES RBP0RTIN3

MINUTE - UNIT MINUTF.

26
MR

TER I

RL

W83-W84

CURE TIME (907. MH ) MATERIAL W81-W82 10-53 MINUTE MATERIAL W83-W84 14-83 MINUTE

27
BEP0RT 35 5 INTEBLAB0RAT0RI PROGRAM OK EVALUATION OF RUBBER MINIMUM TORQUE - POUND-INCHES MARCH 1573 MATBRIAL W81-W82 MATBRIAL W83-W84 COMMERCIAL TIRE TREAD SBR

LAB MEAN MEAN % REL MEAN MFAN % REL VAR CADE F LB-IN. N-M DEV SDR LB-IN. N-M DBV SDR C0DB INSTRUMENT. UNIT, OR OTHER V/ V0074A 5.00 .5649 -2.2 1.31 6.40 .7231 6 1.09 01 V0074B 5.25 . 5932 2.7 .44 6. 62 . 7486 2.9 1.03 01 VO 077 4.97 .5621 -2.7 .52 6.35 .7175 -1.4 1.29 01 V0078 X 10.65 1.2033 99.9 .44 7.15 .8079 11.1 .70 01 VO 079 4.75 . 5367 -7.1 3.93X 6.05 . 6836 -6.0 .85 01

VO 0 83 5.30 . 5988 3.6 .87 6.60 .7457 2.5 .78 01

VO 0 85 4.60 .5200 -10.0 .39 6.06 . 6850 -5.8 .00 40 ORIGINAL IN NBHT0N- MB TER

VO 0 90 4.80 • 5424 -6.1 .87 6.00 .6779 -6.8 .00 01 V0092 * 5.50 • 6214 7.5 .00 6.45 .7288 .2 1.06 01 V0095 X 5.75 .6497 12.4 5. 56X 8.10 .9152 25.8 1.45 01 V0100 5.10 .5762 -.3 .44 6.40 .7231 -.6 .00 01 VO 117 5.30 .5988 3.6 1.19 6.70 .7570 4.1 2.96X 01 V01 20 5.50 .6214 7.5 1.31 7.00 .7909 8.7 1.79 01 VO 1 2 2 6.00 .6779 17.3 .87 7.45 . 8418 15.7 1. 06 01

VO i 28 5.15 .5819 .7 .44 6. 50 . 7344 1.0 .39 01

V01 44 5.90 . 6666 1 5.4 1.75 7. 30 • 8246 13.4 2.96X 01 V01 46 4.50 .5085 -12.0 4. 36X 6.00 .6779 -6.8 3.57X 01 V01 48 5.25 .5932 2.7 4.48X 6.62 . 7486 2.9 2.06 01 V01 49 5.15 .5819 .7 1.41 6.12 .6921 = 4. 9 .39 01 VOl 50 X 7.25 .8192 41.8 4. SOX 9.00 1.C169 39. 8 1.95 01

VO I 52 4.55 .5141 -11.0 1 .75 5. 80 .6553 -9.9 .00 01 VOl 5* 5.00 . 5649 -2.2 .87 6.20 .7005 -3.7 .39 01 VOl 5S 5.15 .581 9 .7 .44 6.30 .711 8 -2.1 .00 01 VOl 59 5.35 . 6045 4.6 1.19 6.60 .7457 2.5 1.03 01 VOl 61 4.95 .5593 -3.2 1.19 6.15 . 6949 = 4.5 1.06 01

VOl 66 5. CO .5649 = 2.2 .44 6.30 .7118 -2. 1 1.03 01 VOl 69 4.78 .5400 -6.5 1.16 6.11 . 6900 -5.1 1.19 40 ORIGINAL IN NBRTON-METER

VOl 82 4.85 .5480 -5.2 .87 5.95 .6723 -7.6 1.45 01 V0207 X 7.35 . 8305 43.7 1 . 51 8.60 .9717 33.6 1.70 01 V0208 5.03 . 5683 -1.6 .00 6.52 .7367 1.3 .00 01

VO 211 4.55 • 5141 -11.0 .87 5.95 .6723 -7.6 .78 01 VO 213 X 13.30 1 • 5028 99.9 2.78X 1 5.00 1 .6948 99. 9 .73 01

VO 21 4 X 7.80 .8813 52.5 1.19 9.20 1 . 0395 42.9 13.04X 01

VO 2 1 7 5.10 . 5762 -.3 6.00X 6.80 .7683 5.6 1.56 01 VO 2 1 8 5.15 • 5819 . 7 1.19 6.50 .7344 1.0 .78 01 V0220 5.15 .5819 .7 1.19 6.50 .7344 1 .

0

1.17 01

VO 221 5.85 .6610 14.4 1.75 7.30 .8248 13.4 . 39 01

VO 2 38 4.87 . 5508 -4.7 1.09 6.00 .6779 = 6.8 .00 01

VO 2 43 5.40 • 6101 5.6 1.19 6. 85 .7740 6.4 . 39 01

5.11 .5778 - GR. MEAN * 6. 44 . 7275 3 TEST DETERMINATIONS

.37 • 0416 - SD MEANS - • 41 . 0468 33 LABORATORIES IN GRAND MEANS

.07 .0075 - AVER SDR -

• C7 .0084 39 LABORATORIES REPORTING

LB- IN. N-M • UNIT LB-IN. N- M

28
MATERIAL

W83-W84

MINIMUM TORQUE

MATERIAL W81-W82 5-11 LB-IN. MATERIAL W83-W84 6.44 LB-IN.

29
I NTERLA80RAT0RV PROGRAM ON EVALUATION OF RUBBBR

REPORT 35 - 5 MAXIMUM TORQUE = POUND-INCHES MARCH 1978 MATERIAL W81-W82 MATERIAL W83-R84 COMMERCIAL TIRE TREAD SBR

LA. B MEAN MEAN % REL MEAN WEAN % RBL VAR CODE F LB0 IN* N-M D2V SDR LB-IN. N-M DBV SDR CODE INSTRUMENT. UNIT. OR OTHER VARIATION

V0074A « 23.72 2.6807 -1.5 .88 32.45 3*6665 5.7 1.00 01 V0074B 24.25 2.7400 .7 .48 30.70 3. 4688 . 0 .94 01 V0077 23.30 2.6327 -3.3 1.14 29.60 3 • 3445 -3.6 1.13 01 V0078 25.25 2. 8530 4.8 .74 32.05 3« 621

3

4.4 .62 01 V0C79 23.12 2. 61 29 = 4.0 3 • 31 X 30.00 3.3897 -2. 3 . 00 01 V0083 25.05 2.8304 4.0 2.05 31 .90 3.6044 3.9 1.93 01 VO 0 85 23.10 2.6101 -4.1 .71 29.96 3.3851 = 2. * .72 40 ORIGINAL IN NB ETON- MB TER

VO 090 23.45 2. 6496 -2.6 .32 29. 55 3. 3389 -3.7 .15 01 V0092 25.92 2.9293 7.6 .99 32.10 3.6270 4.6 .62 01 V0095 * 21.50 2.6553 = 2.4 4. 16X 28.00 3.1637 -8. 8 1.75 01

V01 OC 24.55 2.7739 1.9 .18 31.60 3.5705 2.9 . 00 01

VO 117 24.35 2.751? 1.1 1 . 21 31.50 3.5592 2. 6 .93 01 V01 20 25.05 2. 8304 4. 0 1 .00 32.55 3.6778 6.0 2.23 01 VO i 22 25.20 2. 8473 4.6 2.42X 31.90 3. 6044 3.9 1. 69 01 VOi 28 22.75 2. 5705 -5.6 .82 30.45 3.4405 -.8 . 31 01

V01 4 $ 25.00 2.8248 3.8 .37 31.80 3.5931 3. 6 3.09X 01 VOI 46 22.45 2.5366 -6.8 .50 28.90 3.2654 -5.9 .62 01 VOI 48 25.45 2. 8756 5.7 2.18 31.95 3. 6100 4.1 .31 01 VOI 49 23.67 2. 6750 -1.7 1.54 29.77 3. 3643 -3.0 .77 01 VOI 50 25.00 2.8248 3.8 1.84 30. 50 3. 4462 -. 6 3. 09X 01

VOI 52 23.00 2.59 88 = 4.5 .00 29.30 3.31 06 -4. 5 .31 01 VOI 54 24.00 2.7118 -.4 .18 30.45 3.4405 -. 8 .31 01 VOI 56 23.20 2.6214 -3.7 .00 29.40 3.3219 -4.2 1.35 01 VOI 58 24.17 2.7315 .4 .96 30.80 3.4801 .3 .54 01 VO 161 22.65 2.5592 -6. 0 .81 29. 20 3.2993 -4. 9 1.15 01

VOI 66 23.50 2.6553 -2.4 .37 30.50 3.4462 -.6 .62 01 VOI 69 23. 81 2.6901 -1.2 1.07 30.14 3.4051 -1.8 .82 40 ORIGINAL IN NBHTON- MBTE

R

VOI 82 23.85 2. 6948 -1.0 1 .33 31 . 30 3.5366 2.0 1.07 01 VO 207 26.05 2. 9434 8. 1 1.44 32. 85 3.7117 7.0 .85 01 V0208 25.33 2. 8620 5.2 1.73 31 .10 3.5140 1.3 4. 61 X 01

VC 2 1 1 22.35 2.5253 -7. 2 .58 28. 60 3.2315 -6.8 .31 01

VO 2 1 3 X 47.00 5. 3105 95.1 2.39 58.75 6.6382 91.4 4 • 6 4 X 01 VO 2 1 4 26. C5 2.9434 8.1 .18 32.15 3. 6326 4.7 1.93 01 VO cl 7 23.70 2.6779 -1.6 2.08 30. 30 3. 4236 -1.3 1.86 01 VO 218 23.50 2.6553 -2.4 .66 30.60 3.4575 “. 3 1.44 01 V0220 23.55 2.6609 -2.2 4.22X 30.20 3.4123 -1.6 2. 4 8

X

01 VO 2 2

1

25.00 2. 8248 3.8 .00 32.10 3.6270 4.6 .93 01 VO 2 38 22.87 2.5846 -5.0 .92 29. 25 3. 3050 -4.7 1.55 01 VO 243 24.60 2.7796 2.1 1.33 31.00 3.5027 1.0 1.24 01 24.09 2.7217 - GR. MEAN - 30.70 3.4684 3 TEST DETERMINATIONS

1.04 .1173 - SD MBANS - 1.22 .1378 38 LABORATORIES IN GRAND MBANS

• 16 .0177 - AVER SDR - .09 .0105 39 LABORATORIES REPORTING

LB*3 IN. N-M • UNIT LB-IN. N-M

30
MATERIAL

W83-N84

MAXIMUM T0RQUE

MATERIAL W81-W82 24.09 LB-IN. MATERIAL W83-W84 30.70 LB-IN.

31
N 3S-1 .4A (REV. 7-73)

U.S. DEPT. OF COMM. BIBLIOGRAPHIC DATA

SHEET

1. PUBLICATION OR KHPOKT NO. RUBBER CRP 35

2. Gov’t Accession

No.

3. Recipient’s Accession No.

4. TITLE AND SUBTITLE

INTERLABORATORY PROGRAMS FOR RUBBER

AnalysesvNo. 35

January - March 1978

5. Publication Date 6/12/78

6 . Performing Organization Code

7. AUTHOR(S)

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

8 . Performing Organ. Report No. NBSIR 78-1339

9. PERFORMING ORGANIZATION NAME AND ADDRESS

NATIONAL BUREAU OF STANDARDS

DEPARTMENT OF COMMERCE

WASHINGTON, D.C. 20234

10. Projcct/Task/Work Unit No.

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 ot 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 Unlimited

[XX For Official Distribution. Do Not Release to NTIS

|

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

| | 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