A11100 Tflbim NBS

NAT'L INST. OF STAND & TECH RLC.

PUBLICATIONS

A 11 10 5 4 E 1 3 a M

Collaborative Testing Services, Inc.

]

I

COLLABORATIVE REFERENCE PROGRAM

FOR RUBBER

ANALYSES NO. 41

JULY SEPTEMBER 1979

3

U.S. DEPARTMENT OF COMMERCE

National Bureau of Standards
NBS COLLABORATIVE REFERENCE PROGRAMS

TAPPI 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

CTS Rubber (4 times per year)

Tensile strength, ultimate elongation and tensile stress

Hardness

Mooney viscosity

Vulcanization properties

CTS Thermal Insulation Materials (2 times per year)

19 test methods for thermal insulation materials covering:

thermal properties; strength properties; dimensions, stability,

and density properties; fire properties; and properties of

vapor barriers

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)

NBS Collaborative Reference Programs

A05 Technology Building

National Bureau of Standards

Washington, DC 20234

Rev. 3/79
INTERLABORATORY PROGRAMS

FOR RUBBER

FFR 2 7 iQpn

ho-i ft CC 'CjffC

(QCtOO

\A j (o

Cx

Analyses No. 41

July - September 1979

T. L. Cummings, Research Associate,

Collaborative Testing Services, Inc.

J. Horlick

Office of Testing Laboratory Evaluation Technology

Office of Engineering Standards

National Engineering Laboratory

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 79-1811

INTRODUCTION

This report summarizes the test results for the third quarter of 1979.

The tests cover the four areas in the NBS Collaborative Reference

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

and Vulcanization Properties. The program is maintained and operated

by Collaborative Testing Services, Inc. (CTS). CTS is a non-profit

organization of associations that offers CRP's to a wide range of

industries

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

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

the English and Metric expressions side-by-side. Also, shown in the

tables are notes concerning specific laboratory results and instrument, unit

or other variations. 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 Thomas Cummings or Jeffrey Horlick at

(301) 921 - 2946 .

Jeffre^ , jrator

NBS Collaborative Reference Programs

Office of Testing Laboratory Evaluation Technology

September 27, 1979

TABLE OF CONTENTS

Introduction

Table of Contents

Key to Tables and Graphs

Program 1: Tensile strength, ultimate elongation

and stress at 300% elongation

Program 2: Hardness

Program 4: Mooney Viscosity

Program 5: Vulcanization characteristics determined

with oscillating-disk cure meter

Page

1

2

5

13

17

21

1
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 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 41 1 INTERLABOR ATORY PROGRAM ON EVALUATION OF RUBBER

JULY 1979

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

NOTES

Materials C91 and C92 were sheets of the same vulcanized rubber. Similarly, materials C93 and C94 were alike.

V100 results were obtained at NBS using a pendulum tester.

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

V126 used Die 2 in BS903

V070, V158, V208 and V220 did not specify a Die V225 used ASTM Die D V166 reported tensile properties for samples C91, C92, C93,

and C94 to be invalid.

INSTRUMENTS RELATIVE HUMIDITY

Number

Instrument of Labs Percent Relative Number

Humidity of Labs Percent Electronic Manual 21 34% Electronic Automatic 19 31% Pendulum Manual 18 29% Pendulum Automatic 2 3% Not Specified 2 3%

62 100%

Below 45% 9 14% Above 55% 24 39% 45% - 55% 18 29% Not Specified 11 18%

62 100%

SUMMARY OF ANALYSES

LABS LABS PROPERTY MATERIAL INCL OMIT OR. MEAN

TENSILE C91-C92 56 6 2483o STRENGTH C93-C94 56 6 247S„ TENSILE C91-C92 56 6 17. 125 STRENGTH C93-C94 56 6 17.090

ULTIMATE C91-C92 56 6 602. ELONGATION C93-C94 56 6 569.

STRESS AT C91-C92 57 5 1 166. 300* ELONGATION C93-C94 57 5 1 175. STRESS AT C91-C92 57 5 8.043

300* ELONGATION C93-C94 57 5 8.105

STD DEVIATIONS

LABS SHEETS REPL UNITS

108, 37. 52. POUNDS PER SQUARE INCH

108. 40. 56. POUNDS PER SQUARE INCH .742 .255 .358 MEGAPASCALS

.745 o273 o 383 MEGAPASCALS

20. 7. 16. PERCENT

19. 7. 16. PERCENT

57. 1 1. 25. POUNDS PER SQUARE INCH

59. 11. 25. POUNDS PER SQUARE INCH

o 392 . 100 .174 MEGAPASCALS

o 406 o 098 o 17 1 MEGAPASCALS

PRECISION OF METHODS

fiBPL RBPL ABSOLUTB PERCENT PROPERTY MATERIAL CMP ASTM OR. MEAN REPEAT HEFSOD UNITS REPEAT REPROD

TENSILE C91-C92 5 5 2483. 144o 298. PSI 5© 8 12.0 STRENGTH C93-C94 5 5 2478o 1 540 299. PSI 6e 2 12.1 TENSILE C91-C92 5 5 17. 125 © 993 2.054 MEGAPA 5« 6 12.0 STRENGTH C93-C94 5 5 17.090 lo 061 2.065 MEGAPA 6, 2 12. 1

ULTIMATE C91-C92 5 5 602. 44. 55. % 7.3 9.2 ELONGATION C93-C94 5 5 589. 44. 54. % 7. 5 9.2

STRESS AT C91-C92 5 5 1 166. 70. 157. PSI 6# 0 13.5 300* ELONGATION C93-C94 5 5 1 175. 69o 163. PSI 5# 6 13.9 STRESS AT C9 1-C92 5 5 8. 043 o 483 l.oes MEGAPA 6. 0 13.5 300* ELONGATION C93-C94 5 5 8. 105 . 473 1. 125 MEGAPA 5. 8 13.9

5
I NTBBLAB6RAT0HY PROGRAM 0N EVALUATION OF RUBBER

( REPORT 41-1 TENSILE STRENGTH - POUNDS PER SQUARE INCH JULY 1979 MATERIAL C91-C92 MATERIAL C93-C94

(' COMMERCIAL TIRE TREAD COMMERCIAL TIRE TREAD LAB MEAN MEAN « RBL MEAN MEAN S RBL VAR CODE F PSI MEGAPA DBV SDR PSI MEGAPA DEV SDR CODE INSTRUMENT, UNIT, OR OTHER VARIATION

V0062 2329, 16.062 - 6.2 .88 2365. 16.310 -4.6 1.03 01 V0063 2521, 17.386 lo 5 1. 46 2500. 17.245 .9 .93 01

VO 066 2565, 17.690 3o 3 1.08 25 47. 17. 569 2.8 1.08 01 V0067 2410, 1 6. 62 1 -2. 9 1.1.3 2402. 1 6. 569 -3. 1 .59 01

VO 069 2676, 18.455 7.8 1.26 2667. 1 So 397 7.6 1.23 01 V0070 2348, 16. 197 -5.4 .94 2329. 16o 066 - 6.0 .79 01 V0071 2456. 16.941 - 1.1 1. 13 2434. 16.790 - 1.8 2. 16X 01 V0072 * 2735. 18.862 10. 1 1.20 27 85. 19. 207 12.4 .79 01 V0073 2475, 17.069 -.3 .70 24 25. 16.724 - 2. 1 .95 01

VO 076 26 10o 18.000 5. 1 .85 2630. 18. 138 6. 1 .46 01 V0078 2405o 16.586 -3. 1 • 58 2409. 16.617 - 2.8 .84 0 1 V00 83 2505, 17.276 .9 .46 2455. 16.931 -.9 .94 01 V00 84 2500o 17.241 .7 .83 2460. 1 60 966 -.7 1.08 01

VO 085 245 lo 16.904 -1.3 1. 89 2531. 17.455 2. 1 1.11 20 ORIGINAL IN MEGANERTONS PER SQ* METEfi VO 0 87 2455o 16. 931 - 1 . 1 .99 24 20. 16o 690 -2.3 1 . 10 01 V0088 2268. IS. 645 -So 6 1.75 2271. 15.666 -8.3 . 80 01 V0092 2540o 17.517 2.3 1. 83 2570. 17.724 3.7 1.56 01 VO 0 95 2500. 17.241 .7 1.22 2440. 16. 828 -1.5 .87 01 VOl 00 2490© 17. 172 .3 1.30 2550. 170 586 2.9 1. 29 0 1 VO 102 2420. 1 60 690 -2.5 1.22 2370. 160 345 -4.4 1.66 01

VOl 11 2470. 17.034 -.5 1.42 2495. 17o 207 .7 1.05 01 VOl 17 2390. 16.483 -3o 8 .59 2395. 16o 5 17 -3.4 .73 01

VO 123 2460 o 16.966 -.9 .55 2425. 16.724 - 2. 1 .96 01

VO 126 2582. 17.805 4.0 1.00 25 89. 17o 855 4.5 .92 20 ORIGINAL IN MEGANERTONS PER SQ* METEB

VO 1 28 2590. 17.e62 4o 3 .83 2610. 1 80 000 50 3 1.28 01

VO 144 2510. 17.310 1. 1 1.25 2480. 17. 103 . 1 1.61 01 V0144B 2580. 17.793 3.9 .87 2 580. 17.793 4. 1 1. 18 01

VO 146 2473. 17. 055 -.4 .54 2470. 170 038 -.3 .63 01

VO 149 2511. 17.317 1. 1 1.02 2485. 17o 138 .3 .99 01

VO 1 50 2405. 16. 586 -3. 1 1.08 2412. 160 638 -2.6 .95 01

VO 152 2560. 17.655 3. 1 .93 2490. 17o 172 .5 1.08 01

VO 153 2368o 16.334 -4.6 .96 2389o 160 476 -3o 6 1. 19 01

VOl 54 2575. 17.755 3.7 .79 2575. 170 759 3.9 1.57 01

VO 156 2435c 16.793 -1.9 .99 2420. 16o 690 -2.3 1. 10 01 VOl 58 26 24. 1 8. 100 5.7 1. 07 2582. 17.805 4.2 .95 20 ORIGINAL IN MEGANERTONS PER SO* METER

VO 160 2437. 16.804 -1. 9 1.43 2466. 17.004 -.5 .90 20 ORIGINAL IN MBGANERTONS PER SO* METEB

VO 164 X 1677. 1 lo 569 -32o4 .53 16 54. 11.410 -33. 2 1.85 01 VO 166 X 1997. 13.776 -1 90 6 .90 2027. 13o 983 -18. 2 .99 01

VO 1 68 2592. 17. 879 4.4 .75 2580. 17.797 4. 1 1. 15 01

VO 169 2574. 17.755 3.7 .53 2574. 170 755 3.9 1.54 20 ORIGINAL IN MEGANERTONS PEE SO* METER

VO 176 * 2200. 15. 172 -1 1. 4 .64 2215. 1 5o 276 -10.6 .52 01

VO 184 2380. 16.414 -4.2 .94 2385. 16.448 -3. 8 .78 01

VO 190 2490. 17. 172 .3 .78 2472. 17.048 -.2 .81 01

VO 199 2275. 15.690 -8.4 .59 2275. 15. 690 -8.2 .91 0 1 VO 2 06 2320. 16.000 -6.6 1.23 2330. 16o 069 -6.0 1.30 0 1

VO 207 2535. 17.483 2. 1 .97 2570. 17.724 3.7 .65 01 V0208 * 2553. 17.605 2.8 .81 2458. 16.954 —0 8 1.59 72 ORIGINAL IN MEGAPASCAL RECEIVED LATE V0213 * 2527. 17.425 1.7 1.34 2418. 16. 674 -2.4 2. 1 IX 20 ORIGINAL IN MEGANERTONS PEB SQ. METER

VO 2 14 2445. 16.859 -1.6 .68 2415. 16o 654 -2.6 .63 20 ORIGINAL IN MEGANERTONS PEB SQ. METEB

VO 2 20 2550. 17.586 2.7 1.48 2600. 17.931 4.9 .51 01 V0223 2510. 17.310 1. 1 1.42 2530. 17.448 2. 1 1. 81 01 V0224 2555. 17.621 2.9 1. 18 2532. 17o 466 2.2 2.99X 01 V0225 2257. 15. 566 -9.1 1.84 2238. 15o 434 -9.7 1.04 70 DATA RECEIVED LATE

V0232 2301. 15.872 -7.3 .97 2332. 16. 086 -5.9 .98 01 V0233 23440 16. 165 -50 6 .37 2362. 16.293 -4.7 1.38 01

VO 235 2461. 16.976 -.9 .64 2478. 17.090 -.0 .51 01 V0238 X 23 25. 16.034 -6.4 1.97X 2162. 14.914 -12.7 1.88 01 V0243 X 2582. 17.e07 4.0 1. 15 2451. 16. 907 -1. 1 1.29 01

VO 2 44 2567. 17.705 3.4 .90 2524. 17o 405 1.8 .66 20 ORIGINAL IN MBGANERTONS PEB SQ. METER V0245A 2645. 18.241 6.5 .79 2631. 16o 145 6.2 1. 18 01 V0245B 2567. 17.703 3.4 1.03 2560. 170 655 3.3 .62 01 V0250 2587. 17 0 e45 4.2 .79 2 562. 17.672 3.4 . 88 01

2483. 17. 125 * OR. MBAN - 2478. 17o 090 5 TEST DETERMINATIONS

1 08. .742 - SD MEANS - 108. 0 745 56 LABORATORIES IN GRAND MEANS

5 2. . 358 - AVEfi SDH - 56. 0 383 62 LABORATORIES REPORTING

PSI MEGAPA - UNIT PSI MEGAPA

£
MATERIAL

C93-C94

TENSILE STRENGTH

MATERIAL C91-C92 2483. PSI MATERIAL C93-C94 2478- PSI

MATERIAL C91-C92

7
(

REPORT 41 1 INTBRLABORATOBY PROGRAM ON EVALUATION 6F BUBBBR

( ULTIMATE BLONGATZON - PBHCBNT JULY 1979 MATERIAL C91-C92 MATERIAL C93-C94

COMMERCIAL TIBE TREAD COMMERCIAL TIBE TBEAD LAB MEAN % BEL MEAN % BBL VAB

CODE F % DEV SDR « DBV SDR CODE

V0062 » 543. -9.7 .89 537. —8. 8 1.00 01

VO 063 X 620. 3.0 .99 655. 11.3 .81 01 V0066 612. 1.8 .43 600. 1.9 .70 01

VO 067 585. -2.8 .91 . 567. -3.6 .68 01 V0069 615. 2.2 1. 39 585. -.6 1.49 01 V0070 X 710. 18.0 1.64 660. 12. 1 1.09 01 V0071 595. -1.1 1. 46 583. -.9 2. OSX 01 V0072 6 05. .5 .76 600. 1.9 . 82 01 V0073 X 61. -89.9 .09 61. -89.6 .09 98

V0076 610. 1.3 1.12 595. 1. 1 .5e 01 V0078 570. -5. 3 .50 565. -4.0 .82 01 VO 0 83 610. 1.3 .50 587© -© 2 .96 01 V0084 595. -1.1 1.09 560. -4.9 .85 01 V0085 610. 1.3 1. 40 605. 2© 8 1© 11 01 V0087 605. .5 .72 580. -1.4 2. 6 IX 01

V00 88 594© -1.2 1. 76 570. -3. 1 1.01 0 1 VO 092 630. 4.7 1.21 625. 6.2 © 82 01 V0095 605. • 5 l o 00 595. 1. 1 .77 01 V0100 600. -.3 .57 595o 1. 1 1.33 01 VO 102 600. -.3 .66 585o -o 6 .74 01 VOlll 635. 5.6 1.65 631. 7.2 2.00X 01 V01 17 630. 4.7 .61 605© 2.8 .48 01

VO 123 620o 3. 0 .75 590© .2 .49 01

VO 126 6 35. 5.5 .93 619© 5.2 .79 01

VO 128 605. . 5 .93 590. o 2 .91 01

VO 144 585. -2.8 1.33 560. -4.9 1. 48 01 V0144B 615. 2.2 1. 28 605© % 2.

8

. ei 01

VO 146 600. -.3 1.24 600© 1.9 .78 01

VO 149 615. 2.2 1.20 595. 1.1 1. 13 01

VO 150 565. -6. 1 ©89 560o -4.9 © 69 01

VO 152 595. -1. 1 .53 575. -2.3 .54 0 1 VO 153 570. -5.3 . 14 570. -3.2 . 14 01

VO 154 600. -.3 .81 580. -1.5 1. 21 01 VO 156 570. -5o 3 1. 28 555. -5.7 .92 0 1 VO 158 605. .5 la 32 600© lo 9 .81 01

VO 160 580© -3.6 1. 06 590© .2 1.20 01

VO 164 597. -.7 1. 12 597© 1.5 1.77 01 VO 166 585. -2.8 .79 580© -1.5 .82 01

VO 168 600. -.3 .64 600. 1.9 1.01 01 VO 169 620, 3.0 .72 615. 4.5 1.47 01

VO 176 590. -2.0 . 83 605. 2.8 .87 01

VO 184 605© .5 1. 26 580. -1.5 1.35 01 VO 190 600. -.3 .76 600. 1.9 .97 01

VO 199 625© 3.8 1.22 600. 1.9 1. 76 01 V0206 575© -4.5 1.05 575. -2.3 .94 01 V0207 592. -1.6 . 16 592. .6 .07 0 1 V0208 X 555. -7.8 1.98X 500. -15. 1 3. OSX 70

VO 2 13 573. -4.7 1.00 543. -7.7 1.56 01 V0214 610. 1.3 1.27 585. -.6 1. 50 01

VO 2 20 590. -2.0 1. 22 590. .2 1.04 01 V0223 585. -2. 8 1.66 570© -3.2 1.41 01 VO 2 24 622. 3.4 1. 13 600. 1.9 2. 67X 01 V0225 X 540o -1 0.3 .67 515. -12.5 o 56 70

V0232 607. .9 .98 605. 2.8 .94 01

VO 2 33 585© -2.8 .53 575. -2.3 1.32 01

VO 235 633. 5.3 1.05 622. 5© 7 .69 01 V0238 X 560. -7.0 1.70 515. - 1 2© 5 1.66 01 VO 2 43 630© 4.7 .70 590. .2 1. 39 01 V0244 635. 5.5 1.22 6 15. 4.5 .42 01 V0245A 610. 1.3 .69 600© 1.9 1© 18 01 V0245B 597. -.7 1.02 592. .6 .73 01 V0250 * 625© 3. 8 .94 575. -2o 3 .96 01

6 02© - GR. MEAN - 589. 5 20. - SD MEANS - 19. 56

16. AVER 9DR - 16. 62

* - UNIT •

INSTRUMENT. UNIT. 0S OTHER VARIATION

EXTREME TEST BBSULTS

DATA RECBIVED LATE

DATA RECEIVED LATE

TEST DETERMINATIONS

LABORATORIES IN GRAND MEANS LABORATORIES REPORTING

8
MATERIAL

C93-C94

ULTIMATE ELONGATION

MATERIAL C91-C92 602. */. MATERIAL C93-C94 589- /

a
(

(

(

l

INTEBLABORAT0KY PROGRAM ON EVALUATION OF HUS BBS BEPORT 41-1 STBB8S AT 300 « BL0NGATION - POUNDS PBB SOUABB INCH JULY 1979 MATERIAL C91-C92 MATBRIAL C93-C94

COMMERCIAL TIBS TBBAD COMMERCIAL TIBB TREAD

LAB MEAN MEAN S BEL MEAN BEAM S BBL VAB

C6DB F PSI MEGAFA DEV aos PSI MEGAPA DBV 8DB CODE INSTRUMENT. UNIT. OB OTHER VARIATION

VO 062 1232. 8.50 0 5.7 i.ea 1230. 8.483 4.7 1.12 01

VO 063 1186. e. 179 1.7 .68 1150. 7o 93 1 -2. 1 .50 01

VO 066 1107. 7.63e -5. 0 1.21 1130. 7.793 -3. 8 1.17 01

VO 067 1192. 8.224 2.3 .66 lies. 8. 172 .8 1. 07 01 V0069 1177. 8. 121 1.0 .71 1231. 8.490 4.7 1. IS 01 V0070 X 854. 5.893 -26.7 1.35 865. 5. 966 -26.4 .79 01 V0071 1176. 8. 1 14 .9 1. 14 1 165. 8.034 -.9 1.47 01 V0072 1170. 8.069 .3 1.56 1210. 8. 345 3.0 .94 01

VO 073 1125. 7.759 —

3

0 5 1.39 1087. 7.50 0 -7.5 .87 01

VO 076 1240. 8. 552 6.3 .55 1265. 80 724 7.6 .87 01 V0078 1237. 8.534 6. 1 1.20 1222. 8.428 4.0 .86 01

VO 0 83 1205. e.3io 3.3 .83 1 170. 8. 069 -. 4 .90 01

VO 0 84 1170. 8.G69 .3 1.01 1 1 85. 8. 172 .8 1.02 01 V0085 1146. 7.902 -lo 8 .89 1197. 80 252 1.8 1.34 20 ORIGINAL IN MBGANERTONS PER SQ# METER

VO 0 87 1205. 8.310 3.3 .78 1195. 8.241 lo 7 1.20 01 V0088 1073o 7.400 -8.0 5.99X 1049. 7. 238 -10.7 1.58 01 V0092 1115. 7.690 -4.4 1.03 11 15. 7.690 -5. 1 2. 14X 01 V0095 1140. 7. 862 -2.2 1.40 1 160. 8.000 -1.3 1.32 01

VO 100 1180. 8. 138 1.2 2.05X 1210. 8o 345 3.0 .68 01

VO 102 1055o 7. 276 -9.5 .53 1065. 7o 345 -9.4 1. 17 01

voi ii 1065. 70 483 -7.0 • 61 11 15. 7.690 -5. 1 .39 01

V01 17 1055. 7. 276 -9. 5 .77 1 105. 7.621 -6.0 .53 01

VO 123 1100. 7.586 -5.7 1. 12 1130. 7.793 -3o 8 1.55 01 VO 126 1 139o 7. 85 2 -2.4 .53 1155. 7. 967 -1.7 .59 20 ORIGINAL IN MBGANERTONS PBB SQ# METER

VO 128 1230o 8.483 5.5 .82 12 30. 80 483 4.7 1. 13 01

VO 144 1240. 8.552 6.3 2.55X 1265. 8.724 7.6 .93 01 V0144B 1150. 7.931 -1.4 1.39 1145. 7. 897 -2.6 1.70 01

VO 146 1179. 8. 134 1. 1 1.98X 1124. 7.752 -4.4 1.66 01

VO 149 1170. e. C69 .3 1. 12 1170. 8. 069 -.4 .67 01

VO 150 1155. 7.966 -1.0 1.25 1 1S5. 7o 966 -1.7 .85 01

VO 152 1195. 8.24 1 2. 5 . 86 1205. 6.310 2.5 .56 01

VO 153 1152. 7.945 -1.2 2. 131 1 181o 8o 148 .5 1. 11 01

VO 154 1175. 8. 103 .8 1.38 1225. 8o 448 4.2 .96 01

VO 156 1205. 8.310 3o 3 .94 1200. 80 276 2. 1 1. 10 01

VO 158 1243. e.572 6. 6 2.66X 1232. 8o 4 97 4.8 1.37 20 ORIGINAL IN MBGANERTONS PER SO* METER

VO 160 1240. 8.552 6.3 1.32 1247. 8.602 6. 1 .89 20 ORIGINAL IN MBGANERTONS PER SQ# METER

VO 164 X 725. 5. 000 -37.8 3.51X 677. 4.669 -42o 4 1.26 0 1 VO 166 X 932. 6. 428 -20. 1 .56 963. 6. 645 -18.0 • 41 01

VO 168 1195. 8.24 1 2. 5 .81 12 02. 8.293 2.3 .55 01

VO 169 1146. 7o 902 - lo 8 .94 1160. 8. 002 — lo 3 .58 20 ORIGINAL IN MBGANERTONS PER SO* METER

VO 176 1C70. 7.37 9 -8o 3 .73 1040. 7. 172 -1 1. 5 .94 0 1 VO 184 1107. 7o 638 -5. 0 .79 1160. 8o 000 -1.3 .65 01 VOI 90 1258. 8o 676 7.9 1.13 1232. 80 497 4o 8 1. 18 01 VO 199 1 08 8o 7o 503 -6.7 .98 10 93. 7.538 -7.0 .94 0 1 V02 06 1170. 8 0 C69 .3 1.07 1195. 8.241 1.7 .56 01

VO 207 1260. 8.690 8.0 1.64 1245. 8. 586 5.9 2. 1 IX 01

VO 2 08 X 1400. 9.653 20. 0 3.09X 1421. 9.803 20. 9 6.66X 72 ORIGINAL IN MEGAPASCAL RECEIVED LATE V0213 1276. 8.797 9.4 .83 1289. 8.887 9.7 1. 15 20 ORIGINAL IN MBGANBRTONS PER SO* METER

V0214 1172. e.oe 2 .5 .37 1242. 8o 567 5.7 .56 20 ORIGINAL IN MBGANERTONS PER SO* METER

V0220 1 187. e. 190 lo a .53 1175. 8. 103 -.0 1.21 0 1 V0223 1185. 8. 172 1.6 1. 12 1210. 8. 345 3.0 .74 01 V0224 1197. 8.259 2.7 1.23 1250. 8.621 6.4 1. 16 0 1 V0225 1222. 8.43 1 4.8 5. 14X 1257. 80 669 7o 0 2.03X 70 DATA RECEIVED LATE V0232 1073. 7o 403 -8. 0 .99 1061. 7.321 -9.7 1.00 01 V0233 1112. 7.672 -4.6 1.17 1127. 7. 772 -4. 1 1.21 01 V0235 1080. 7.448 -7.4 l o 01 1106. 7o 628 -5.9 .78 01 V0238 1175. 6. 103 o 8 .54 1175. 8. 103 -.0 1. 15 01 V0243 1088. 7.507 -6.7 1.03 1084. 70 476 -7. 8 1.26 01 V0244 1236. 8 0 527 60 0 1.20 1237. 8o 532 5.3 . 80 20 ORIGINAL IN MEGANERTONS PER SQ* METER V0245A 1209. e.338 3.7 1.10 1209. 8. 338 2.9 1.57 01 V0245B 1166. 8.045 .0 .82 1173. 8.093 ”o 1 .90 01 V0250 1175. 8. 103 . 8 1.39 1212. 8o 362 3.2 .84 01

1166. e o 043 - OH. MEAN - 1 175. 8. 105 5 TEST DETERMINATIONS

57. .392 - SD MEANS “ 59. o 406 57 LABORATORIES IN GBAND MEANS

25. e 174 - AVB8 SDR - 25. . 171 62 LABORATORIES REPORTING

PSI MEGAPA - UNIT PSI MBGAPA

10
MATERIAL

C93-C94

STRESS AT 3007. ELONGATION

MATERIAL C91-C92 1166. PSI MATERIAL C93-C94 1175. PSI

11

(

INTBBLABABATABT FBAOBAB AH BVALUATIAN AP BUBBBB

C BEFABT 41-2 JOLT 1979

l

(

(

<

HARDNESS

NOTES

Materials C91 and C92 were sheets of the same vulcanized rubber. Similarly, materials C93 and C94 were alike.

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

Three of the 30 participants reporting used ASTM D1415 (Wallace)

for the hardness determination. All others used ASTM D2240

(Type A Durometer).

SC MBABY AF ANALYSES

LABS LABS FBAFEB1Y MATE SI AL IHCL AMX1

BASENESS C91-C92 29 1 C93-C94 29 1

STD OBVIATIONS

OB. MEAN LABS SBEBI8 BBFL EMITS

6 lo 32 1.04 .16 .45 IBHD 61.29 2.20 .12 .45 IBBD

FBECXSXAN AF MBTBAD8

BBFL BBFL ABSOLUTE PEBCENT

FSAPEBTY MATES IAL CBF ASTM OB. MEAN BBPEAT BBFBAD UNITS BBPEAT BBFBAD

BABDNBSt C91-C92 5 5 61.32 Is 25 5.38 IBBD 2.0 8.6 C93-C94 5 5 61.29 1.26 6.11 IBBD 2.0 10.0

13
INTBBLAB0BATORY PKOGHAM ON EVALUATION 0F BOBBER

REPORT 41-2 HARDNESS - IBBD JULY 1979 MATERIAL C91-C92 MATBBIAL C93-C94

COMMERCIAL USE TREAD COMMERCIAL TIBB TBEAD

LAB BEAN * BEL MEAN * BEL VAB

CODE F I RED DEV SDB I BHD DEV SDB C0DE INSTRUMENT, ONIT. 0B 0THEB VARIATION

V0062 61.50 • 3 1. 56 6 1. 25 -.1 1.04 01 V0069 * 56.00 -8.7 .76 55.50 -9.5 .49 01 V0070 61.75 .7 1.56 63.00 2.8 .99 01 V0071 64.00 4.4 1.28 64.00 4.4 1. 10 01 V0072 £4.00 4.4 1.21 64.50 5.2 1.03 01 V0078 65.00 6.0 .49 64. 00 4.4 .99 01 V0084 62.00 1.1 1. 10 61.50 .3 1. 10 01

VO 085 61.00 -.5 .96 61.90 1.0 . 80 01 V0087 61.50 .3 .00 62.00 1.2 .00 01

VO 0 88 59.50 -3.0 1. 10 59. 00 -3.7 .49 01

VO 092 61.00 -.5 1. 9 1

X

59.00 -3.7 2.2SX 01 V009S 61.50 .3 • 61 6 2.00 1.2 .00 01 V0100 60.15 -1.9 .79 60.50 -1.3 .81 01

VO 102 64.00 4.4 1.48 65o 00 6.0 .49 01

V01 11 64.50 5.2 .99 6 5o 0 0 6o 0 .99 0 1

VO 128 59.00 -3.8 .99 60.50 -1.3 .99 01

VO 144 62.00 1. 1 ©61 62.00 1.2 1.27 01

VO 168 62.00 1. 1 .55 61.75 .7 .49 01

VO 169 60.00 -2.2 .49 59.50 -2.9 o 00 01

VO 176 60.00 -2.2 1. 14 59o 00 -3.7 1. 12 01

VO 190 63o00 2.7 1.21 63.00 2.8 lo 2 1 01 V0200 60.25 -1.7 .92 60.25 -1.7 a e5 01 V0206 58.50 -4.6 1.02 57.25 -6o 6 1. 37 01 V0208 6 1©75 .7 1.33 61.60 .5 2. 68X 70 DATA RECEIVED LATE

V02 14 6 2.35 1.7 1. 23 62.65 2.2 .71 01 V0224 60.00 -2.2 .92 6 1.00 -.5 1. 10 01 V0233 60.00 -2.2 .49 61.00 -.5 1.71 01 V0235 61.25 -. 1 .99 60.50 -1.3 .98 01

VO 2 43 61.00 -.5 .00 60.00 -2. 1 .00 0 1 VO 2 44 61.50 .3 1.53 6 1.00 -.5 1. 38 01 61.32 0 Bo KEAN - 6 1. 29 5 TEST DETERMINATIONS

1.94 - SD MEANS - 2.20 29 LABORATORIES IN GRAND MEANS

.45 - AVBB 3DR - .45 30 LABORATORIES BEPOBTING

IRHD - ONIT I BHD

14
MATERIAL

C93-C94

HARDNESS

MATERIAL C91-C92 61-32 IRHD MATERIAL C93-C94 61-29 IRHD

15

BEP6BT 41 4 INTBBLABOBATOBY PROGRAM AN EVALUATION OF KDBBBB

AUGUST 1979

c

( MOONEY VISCOSITY

( NOTES

Materials T91 and T92 were the same rubber. Similarly, materials

( T9 3 and T94 were the same rubber. No sample preparation was required

for materials T91 and T92 whereas, mill massing was required for materials T93 and T94.

( V100 results were obtained at NBS on the manually closed viscometer

used for determining the Mooney viscosities of the standard rubbers.

SUMMABY OF ANALYSES

LAES LABS STD DEVIATIONS

FBOFEHTY MATERIAL INCL OMIT OB0 MEAN LABS SBEETS RBPL DNITS

MOONEY T91-T92 36 2 670 97 la 73 a 12 .34 ML VISCOSITY T93-T94 38 2 65. 37 2.91 o 53 .52 ML

PRECISION OF MBTBODS

BEFL BEFL ABSOLDTB PBBCENT

FBOFEBTY MATERIAL CBP ASTM OR© MEAN BEPEAT BEPBOD UNITS BEPEAT BEPBOD

NeCNBY T91-T92 3 3 67©97 ©93 4. 60 ML 1©4 7. 1 VISCOSITY T93-T94 3 3 6 5o 37 1 © 44 8© 06 ML 2.2 12.3

17
REPORT 41 4 INTBRLABORATORY PROGRAM 6N EVALUATION OF RUBBER

MOONEY VISCOSITY - ML AUGUST 1979 MATERIAL T91-T9 2 MATERIAL T93 -T94 BUTYL BUBBEB SBB LAB MEAN S BEL MEAN « BEL VAR

CODE F ML DEV SOB ML DEV SDR CODE INSTRUMENT. UNIT, OR OTBER VARIATION

V0060 69.25 1.9 .74 66.75 2. 1 1.01 01 V0061 67c 10 -1.3 .90 66.95 2.4 .70 01

VO 071 6e.eo 1.2 1. 04 64. 10 -1.9 lo 05 01 V0072 68.00 .0 3.75X 63.00 -3o 6 1.52 01 V0073 • 66o 00 -2.9 .00 56o 5 0 -13.6 1. 52 01 V0C77 67.00 -1.4 .69 62.05 -5. 1 1.62 01 V0078 X 63. 70 -6 0 3 1.79 51.65 -21.0 2.46X 01

VO 079 64.80 -4.7 .61 66. IS 1.2 1.65 01

VO 0 80 67.00 -1.4 1.43 63.65 -2.6 3. 79X 01 V00 83 690 45 2.2 .98 68. 30 4.5 .90 01 vooes * 72.50 6.7 1. 17 69.00 5.6 .83 01

V00 90 70.00 3.0 .43 6 5.25 -.2 .28 01 V0092 67.00 -1.4 1.71 6 8. 50 4. 8 1.52 01 V0095 69.00 1.5 . 86 63.50 -2.9 1.01 01

VO 100 6e o 50 o 8 . 83 65.85 .7 .77 01

V01 11 X 59.40 12.6 .79 60.20 -7.9 .58 01

VO 1 17 67o 50 -.7 2o 83X 6 5.25 -.2 1. 79 01

VO 128 68.00 .0 3. 94 X 72.00 10.2 2.97X 01

VO 144 69.50 2.2 .00 64. 00 -2. 1 lo 1 1 01

VO 146 65.00 -4.4 .86 68. 00 4.0 .56 01

VO 149 6 8. 15 .3 .82 70.35 7.6 1.63 01

V01 50 69.00 lo 5 1.71 63.50 -2.9 3. 39X 01

VO 156 65o 25 -4.0 1.83 64.87 -.7 1. 12 01

VO 1 66 6 0o 00 .0 1. 17 67.50 3o 3 1. 39 01

VO 169 70.00 3.0 oOO 66. 00 1.0 o 00 01

VO 177 65.95 -3.0 .99 6 5.75 .6 .59 01

VO 182 70o 25 3.4 .43 6 5 0 25 -.2 .56 01

VO 190 68.55 o 8 .62 60.90 -6o 8 o 30 01 V0207 67o 95 -.0 lo 28 64o 75 -.9 1. 20 01 V0208 68.00 .0 1.71 6 2.50 -4.4 .56 01

V02 1

1

67.50 -.7 .86 63.75 -2.5 .56 01

VO 2 13 67.50 -.7 . 86 66.75 2. 1 .28 01

VC 2 14 67.00 -1.4 .43 64.50 -1.3 1.39 01 V0220 66.90 -1.6 1. 12 65.70 .5 . e4 01 V0221 70.25 3.4 . 86 6 8o 00 4.0 • e3 01

VO 2 23 65 0 50 -3.6 .43 64.75 -.9 .76 01

VO 236 70.00 3.0 .00 67.50 3.3 lo 1 1 01 V0238 65.00 -4.4 1.71 590 5 0 -9.0 1. 1

1

01 V0250 69.55 2.3 o 48 67.85 30 e 1.31 01 V0251 68o 25 .4 1.47 65.40 o 1 .65 01

67o 97 * GB. MEAN • 6 5o 37 3 TEST DETERMINATIONS

lo 73 - 3D MEANS • 2.91 38 LABORATORIES IN GRAND MEANS

.34 - A VE B SDR - .52 40 LABORATORIES REPORTING

ML • UNIT ML
MATERIAL

T93-T94

MOONEY VISCOSITY

MATERIAL T91-T92 67.97 ML MATERIAL T93-T94 65.37 ML

19

REPORT 41 5 INTERLAB0HAT6RY PROGRAM ON EVALUATION OF RUBBER

AUGUST 1979

VULCANIZATION CHARACTERISTICS USING OSCILLATING DISK CURE METER

NOTES

Materials Y91 and Y92 were the same rubber formulation. Similarly, materials Y93 and Y94 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 OF ANALYSES

LABS LABS STD DEVIATIONS

PROPERTY MATERIAL INCL OMIT GRo MEAN LABS SHEET S REPL UNITS

scescH Y91-Y92 33 0 4 0 430 o 324 ,048 o 07 1 MINUTES

TIME Y93-Y94 33 0 4® 460 o 274 o 025 ,052 MINUTES

CUBE TIME Y91-Y92 29 4 6o 50 o 28 o01 o 07 MINUTES

(50* MB) Y93-Y94 29 4 6o 53 o 26 o 02 .06 MINUTES

CURE TIME Y91-Y92 32 1 lOoOl o 55 o 04 ,09 MINUTES

( 90* MH ) Y93-Y94 32 1 10o 06 o 44 o 05 ,09 MINUTES

MINIMUM Y91-Y92 29 4 5C 15 o 60 o 02 ,06 POUND- INCHES TORQUE Y93-Y94 29 4 50 17 o 63 o 0 2 a 08 POUND-INCHES

MINIMUM Y91-Y92 29 4 o 5824 o 0673 a 00 36 .0072 NEWTON-METERS

TeBCUE Y93-Y94 29 4 o 5847 o 0707 a 0027 .0088 NEWTON-METERS

MAXIMUM Y91-Y92 32 1 230 53 la 46 o 0 5 c 16 POUND-INCHES

TORQUE Y93-Y94 32 1 230 52 lo 43 o 05 . 10 POUND-INCHES

MAXIMUM Y91-Y92 32 1 2o 6 590 o 1653 o 007 1 o 0 1 85 NEWTON-METERS

TORQUE Y93-Y94 32 1 2o 6580 a 1616 O 0072 .0115 NEWTON-METERS

PRECISION OF METHODS

BEPL REPL ABSOLUTE PERCENT

PROPERTY MATE5IAL CHP ASTM GRo MEAN REPEAT REPROD UNITS REPEAT REPROD

SCORCH Y91-Y92 3 3 4© 430 © 196 a 897 MINUTE 4,4 20.2

TIME Y93-Y94 3 3 4© 460 o 144 o 7 59 MINUTE 3.2 17.0

CURE TIME Y91-Y9

3 3 6o 50 o 20 o 78 MINUTE 3o 1 1 2o 0

( 50* NH

)

Y93-Y94 3 3 6© 53 o 15 ,72 MINUTE 2a4 11. 1

CURE TIME Y9 1-Y92 3 3 lOoOl ©26 la 82 MINUTE 2.6 15.2 (90* MH

)

Y93-Y94 3 3 o0 o o ©26 lo 23 MINUTE 2.6 12o 2

MINIMUM Y91-Y92 3 3 50 15 © 18 la 65 LB-IN* 3o4 32.0 TORQUE Y93-Y94 3 3 5© 17 o 22 lo 73 LB-INo 4.2 33.5

MINIMUM Y9 1-Y92 3 3 o 5824 © 0198 o 1865 N-M 3.4 32.0

TORQUE Y93-Y94 3 3 o 5847 ©0245 a 1959 N-M 4.2 33o 5

MAXIMUM Y91-Y92 3 3 23© 53 © 45 4o 05 LB-INo 1.9 17.2 TORQUE Y93-Y94 3 3 23© 52 © 28 3o 96 LB-INo lo 2 16a 8 MAXIMUM Y91-Y92 3 3 2©6590 © 0513 a 4579 N-M 1.9 17.2 TORQUE Y93-Y94 3 3 2© 6580 ©0318 .4477 N-M 1.2 16.8

21
REPORT 41 5 1NTEBLABORAT0RY PROGRAM ON EVALUATION 6F BOBBER

SCORCH TIME - MINUTES AUGUST 1979 MATERIAL Y91-Y92 MATERIAL Y93-Y94 COMMERCIAL TIRE TREAD COMMERCIAL TIRE TREAD

LAB MEAN * BEL MEAN « BEL VAR CODE F MINUTE DEV SDR MINUTE DEV SDR CODE INSTRUMENT. UNIT. OH OTHER VARIATION

V0064 4 o 750 7o2 1© 22 4© 800 7.6 o 00 01

VO 074 4 0 250 -4o 1 lo 02 4© 325 -3. 0 loll 01 VO 077 3© 800 -140 2 1© 35 4© 150 -6.9 1. El 01

VO 079 4© 225 - 4o 6 1 o 94 4© 625 3.7 1.39 01 V0083 40 500 1 o 6 1© 49 40 500 .9 .00 01

VO© 9© 4© 775 7 0 a 2© 02 40 855 8.9 1. 13 01 V0092 40 450 o 5 o 4 1 40 400 -1.3 o 96 01 V0095 4© 650 So5 ©82 4© 650 4.3 1.11 01 V01 00 4 0 50 0 1.6 o 4 1 4© 500 o 9 1.66 01

V01 17 4© 750 7 0 2 • 82 4© 700 5.4 o 96 01

VO 120 3© 850 -13o 1 4© 64X 40 100 -a. i 3. 39X 01

VO 128 4© 650 5o 0 o 4 1 4© 600 3. 1 o 00 01

V01 44 3© 950 -ic 0 a o 08 40 035 -9.5 .67 01 V01 46 4 0 600 3 0 a • 41 4© 650 4o 3 . 55 01

VO 1 49 4 o 30 0 -2o9 ©00 40 050 -9.2 . 00 0 1

V© 1 50 * 5© 000 12.9 lo52 50 150 1 50 5 lo 1 1 01

V© 152 4© 550 2o7 o 4 1 4© 750 6o 5 o 55 01

VO 154 4 0 625 4.4 1 © 02 4©675 40 a .76 01

VO 156 4© 425 -o 1 o 20 4© 32 5 -30 0 . 28 01

V01 58 4 0 200 -E.2 o 0 0 4© 150 -6o 9 .28 01

VO 161 4© 350 -lo8 © 82 4© 400 -lo 3 loll 01

V© 1 66 40 750 7.2 1© 22 4©650 4o 3 2.07 01 VO 1 69 4© 250 -4. 1 20 04 4o 400 -1.3 3o 50X 01

VO 182 4©225 -4.6 ©82 4© 27 5 -4. 1 o 55 01

V01 90 4 0 500 1.6 ©61 40 550 2.0 o 76 01

VO 2 07 4 0 450 o5 20 18 4© 500 .9 20 93X 01 V0208 4 0 260 -3.

a

©65 4© 26 0 -4.5 o 22 01 V021 1 4o 325 -2.4 ©76 4© 250 -4o 7 .55 01 V02 13 5© 125 i a. 7 4© 6 4X 4© 800 7.6 lo 2 1 01 V0217 4© 450 o 5 loll 4© 500 .9 lo 11 01 V0221 4o 350 -i 0 a O 82 4© 300 -30 6 2.22 01 V0238 3© 680 - 1 6o 9 2© 2

1

3© 895 - 1 20 7 1. 54 01

VO 2 43 4 0 46 5 .a • 23 4© 405 - lo 2 .64 01

4 0 430 - GR© MEAN • 4© 46 0 3 TEST DETERMINATIONS

©324 SD MEANS - ©274 33 LABORATORIES IN GRAND MEANS

© 071 - AVER SDR -© 052 33 LABORATORIES REPORTING

MINUTE - UNIT MINUTE

22
MATERIAL

Y93-Y94

SC0RCH TIME

MATERIAL Y91-Y92 4-430 MINUTE MATERIAL Y93-Y94 4-460 MINUTE

23
REP8RT 41 - S INTEBLAB6HAT6RY PB60RAM 6N EVALUATION OF RUBBER

CUKE TIKE <50* HE) - MINUTES AUGUST 1979 MATEFIAL Y91-Y92 MATERIAL Y93-Y94

COMMERCIAL TIRE TREAD COMMERCIAL TIRE TREAD

LAB MEAN * BEL MBAN * BEL VAR

C6DE F MINUTE DEV SDR MINUTE DEV SDR CODE

V0064 6c 90 6,2 ,00 6.95 6.4 .00 01 V0074 6©60 1,6 .39 6,60 lo 1 .00 01

VO 077 « 5c 02 • 1 Co 3 1,29 6o 1 0 -60 6 1.59 01 VO 079 X S©94 -80 6 2. 17 6o 45 -1.2 lo 91 01 V0083 e©75 3,9 1 o 07 60 75 3o 4 lo 04 01

VC 0 90 6© 8

1

4o 9 2. 19 6o 84 4© 8 .75 01 V0092 6© 40 -1,5 1,36 6.35 -2.7 lo 42 01 V0095 6o 65 2,4 1. 17 6.70 2.6 o 52 0 1 V01 00 € 0 50 oO ,68 6.45 -1.2 2, 75X 01

V0 1 17 6© 70 3, 1 .78 6.75 3.4 o 52 01

VO 120 X 1 5 0 65 99o 9 3. 46X 16o 30 99.9 10.02X 98 V01 28 60 7

0

3, 1 lo 04 6C 55 .3 oOO 01

VO 1 44 5 0 87 -9,6 .10 5o 9

1

-90 5 o 43 70

VO 1 46 6 o 50 ,0 1.07 60 65 1.0 lo 04 01 V01 49 6© 80 4,7 .39 60 7 0 2o 6 o 00 01

VO 150 * e0 es 5,4 1,46 7o 05 ©o o 3.64X 01

VO 152 6 0 45 -o7 o 39 6.60 lo 1 .90 01

VO 154 6o 92 6o 6 .90 6.87 5,3 .71 01

V01 56 6 0 32 -2,6 .20 6.30 -30 5 o 26 01 V01 58 6© 07 -60 5 .00 6o 00 -8. 1 o 00 01

VO 161 6 o 20 -4 0 6 .78 6.20 -5o 0 o 90 01

VO 166 60 75 3,9 1.46 6.75 3,4 .90 0 1 VO 169 6 0 55 o 8 1.07 6.55 o 3 lo 56 01 VO 1 82 6 o 30 -3 o 0 lo 12 6o 4 0 -2,0 o 52 01

VO 1 90 6© 30 -3 0 0 1,62 6o 4 2 -1,6 1.29 01

VO 2 07 6 0 4 0 -lo 5 2o 45X 6o 50 “o 4 .52 01

VO 2 08 60 58 lo 3 .20 6.61 lo 3 lo 29 01 V02 11 6 0 55 ,8 1.36 6o 5 0 -O 4 lo 04 01 V0213 X 7 0 35 12, 1 1.73 6.75 3o 4 © 52 01 V02 17 6 o 35 -2 0 3 1.46 6.45 • lo 2 2. 06 01 V0221 6 © 45 -,7 1. 46 6.40 -2,0 1.42 01

VO 2 38 5© 86 -9o8 .93 6. 00 -So 1 o 9 1 0 1 V0243 6© 36 -2, 1 . 16 6.34 -2o 8 o 74 01

6© 50 - GRo MEAN * 6.53

©28 - SD MEANS • .26

© C7 - AVEH SDR -o 06 MINUTE • UNIT MINUTE

INSTRUMENT, UNIT, OK OTHER VARIATION

EXTREME TEST RESULTS DATA RECEIVER LATE

3 TEST DETERMINATIONS

29 LABORATORIES IN GRAND MEANS

33 LABORATORIES REPORTING

24
6

4

2

0

8

6

-

4

2

0

-

8

6

-

4

5

CURE TIME (507. MH ) 1ATERIAL Y91-Y92 6.50 MINUTE MATERIAL Y93-Y94 6.53 MINUTE

MATERIAL Y91-Y92

25
REPORT 41-5 AUGUST 1979 INTEBLABORATORY PROGRAM ON EVALUATION OF RUBBER

CURE TIME (90* MB) - MINUTES

l MATERIAL Y91-Y92 MATERIAL Y93-Y94 COMMERCIAL TIRE TREAD COMMERCIAL TIRE TREAD

LAB MEAN * BEL MEAN « BEL VAR C0DE F MINUTE DEV SDB MINUTE DEV SDR CODE INSTRUMENT, UNIT, 8R OTHER VARIATION

V0064 10 o 40 3©9 ©00 10© 6 5 5o 8 ©00 01

VO 0 74 1 0o 30 2© 9 oOO 10© 27 2© 1 © 15 01

VO 077 9© 07 -9©3 3. 101 9© 52 -5.4 1© 51 01 V0079 * 8© 99 -I0o2 3© 48X 9o 8 1 -2.5 3o 06X 01 V0083 1 Oo 55 5© 4 1.85 1 0.60 5© 3 ©84 01 V00 90 10© 59 5© a lo 80 10.43 3© 6 ©32 01 V0092 9©65 -3©6 .62 9o6 5 -4©1 1© 37 01 V0095 10© 20 l©9 ©62 10.05 -© 1 .31 01 V01 00 1 0 o 00 •o 1 ©84 10.15 © 8 1© 34 01 V01 17 10 o 65 6.4 ©82 10.40 3© 3 ©84 01

VO 120 X 220 75 9 9o 9 9o 69X 23o 25 99.9 4.51X 98 EXTREME TEST RESULTS

V01 28 10 o 10 o 9 ©62 1 0© 00 -o 6 ©61 01

V01 44 9o 25 -7© 5 .15 9.37 -6o9 .53 01 V01 46 10© 10 ©9 lo 07 1 Oo 05 -© 1 2o 87X 01

VO 149 1 Oo 35 3©4 .31 1 0© 40 30 3 o 00 01

VO 1 50 10©40 3© 9 3.04X 10o50 4© 3 4. 14X 01

V01 52 9o 7 5 -2© 6 .31 1 0© 2 5 lo 8 ©61 01

V01 54 1 Oo 7 5 7.4 .31 10.65 5o 8 ©61 01

V01 56 9.67 -3o 3 © 46 9.67 -3.9 lo 12 01

V01 58 9© 40 -6© 0 ©00 90 25 -8© 1 o 00 01

VC 1 6 1 9© 40 -6o0 .62 9© 45 -6© 1 ©61 01

VO 166 10.00 -© 1 1. 13 10.05 —© 1 © 3 1 01

VO 169 10.30 2.9 1.46 10. 15 ©8 1.76 01

VO 182 9.77 -2.3 .71 9© 95 -1© 1 o 86 01 VO 1 90 9.60 - 4 o 1 .97 9o 8 0 -2o 6 .92 01

VO 2 07 1 0o 95 9© 4 lo 13 1 1© 1 0 1 Oo 3 1.91 01 VO 2 08 9©76 -2e 4 1 o 49 9© 97 -©9 3o 46X 01 V02 1 1 10© 1 0 o 9 lo 70 10© 12 ©6 1© 07 01 V0213 * 1 1© 25 12© 4 2© 20 1 Oo 6 0 5© 3 1. 86 01 V02 17 9 o 75 -2©6 2© 78X 9o 97 -o 9 lo 47 0 1 V0221 1 0© 25 2o 4 1© 15 10© 30 2© 3 1. 37 01 V0238 9©2S -7© 5 2. 08 9©44 -6© 2 2© 5 IX 01 V0243 9.60 -4© 1 .59 9o 46 -6o 0 lo 70 01

lOoOl - GHo MEAN - 1 Oo 06 3 TEST DETERMINATIONS

©55 - SD MEANS - ©44 32 LABORATORIES IN GRAND MEANS

o 09 - AVER SDR - ©09 33 LABORATORIES REPORTING MINUTE - UNIT MINUTE

26
MATERIAL

Y93-Y94

CURE TIME (907. MH )

MATERIAL Y91-Y92 10-01 MINUTE MATERIAL Y93-Y94 10-06 MINUTE

27

I
REPORT 41 5 AUGUST 1979

IN TER LABORATORY PROGRAM ON EVALUATION OF RUBBER

MINIMUM TORQUE - POUNB-INCHBS

MATERIAL Y91-Y92 MATERIAL Y93-Y94

COMMERCIAL TIRE TREAD COMMERCIAL TIRE TREAD

LAB MEAN MEAN % BEL MEAN MEAN « REL VAR CODE F IB- IN0 N-M DEV SDR LB- IN© N-M DEV SDR CODE INSTRUMENT, UNIT. OR OTHER VARIATION

V0064 5© 30 ©59ee 2© 8 ,00 50 40 ©6101 4.4 . 00 0

1

V0C74 6 o 57 ©7429 27© 6 .23 60 57 ©7429 27. 1 .37 01

VO 077 4©90 .5537 -4© 9 2.44X 4©92 © 5565 -4.0 1.03 01

VO 079 4© 85 o 5 4 8 0 -5© 9 .46 50 05 o 5706 -2.4 .00 01 V0083 6© 15 ©6949 1 9© 3 1 o 37 6© 20 ©7005 19.8 .00 01

VO© 90 4© 90 ©5537 -4©9 1.05 4© 77 o 539

5

-7.7 .69 01 V0092 5© 40 o 6 1 0 1 4© 8 1.25 5© 20 ©5875 .5 .74 0

1

V0095 4© 80 ©5424 -6© 9 .79 40 70 ©5311 -9.2 .74 0

1

V0100 4© 65 © £254 -9 0 8 o 9 1 4© 50 ©5085 -13.0 .37 01 V01 17 4© 80 ©5424 -6© 9 1.25 4© 85 o 5480 -60 3 1.01 0

1

V01 20 X 6© es ©7740 32©9 10c 0 IX 7© 50 ©8474 44. 9 6.00X 01

V01 28 X 7©85 © 8870 52©3 o 79 7© 60 ©8587 46o 9 .00 98 EXTREME TEST RESULTS

VO 144 5 0 25 © £932 1 o 9 1.21 50 20 ©5875 .5 2. 26X 01

VO 146 5 0 15 ©5819 •o 1 1.37 5© 20 ©5875 .5 1.65 01 VO 149 5© 22 o £904 1 o 4 ,00 5o 12 © 5791 -lo 0 .00 01

VO 150 6o 30 ©7118 22© 2 3. 6 31 6©50 ©7344 2 So 6 .00 01

V0 1 52 4©75 © £367 -7© 8 o 9 1 40 80 o 5424 -7.2 .00 01 V01 54 5© 10 ©5762 -lo 1 .46 5© 15 © 5819 -.5 .74 0 1 V01 56 5© 80 o 6££3 12© 5 .91 5© 90 06666 1 4o 0 .74 01

V01 58 4 0 60 ©519e -1 0© 8 0 o o 40 55 © 5141 -12o 1 .37 01

VC 161 5© 05 ©5706 -2©0 2©00 5©00 ©5649 -3o 4 .74 01

VC 166 3© 70 ©4181 -2 8© 2 lo 25 3© 70 ©4iei -28o 5 1. 28 0 1 VO 169 4© 78 ©5400 -7© 3 lo 2 1 4© 91 0 5550 -So 1 1.22 40 ORIGINAL IN NEWTON -METER

VO 182 5© 04 ©5700 -2© 1 ©81 5© 18 ©5850 ,0 1.22 41 ORIGINAL IN DECINEWTON-METER

V01 90 4©70 ©5311 -8© 8 loOO 4© 70 ©5311 -9.2 .99 0 1 V0207 X 8© 45 ©9548 630 9 lo 25 8© 35 ©9435 61o 4 .74 98 EXTREME TEST RESULTS

V0208 4© 66 © £265 -90 6 © 82 4© 66 0 5265 -9.9 ,00 01 V02 1

1

X 6© 35 ©7 175 23© 2 3© 19X 5© 90 © 6666 14.0 1.48 0 1 V0213 6© 12 ©6921 1 8© 8 o 00 6© 12 ©6921 ie0 4 1. 1

1

01 V02 17 5© 1 0 o 5762 -lo 1 o 9 1 50 05 © 57 06 — 2o 4 2o79X 0 1

V0221 5©09 ©5750 - lo 3 o 81 5o 04 ©5700 -2. 5 lo 83 40 ORIGINAL IN NEWTON-METER

V0238 5 0 62 ©6356 9© 1 lo 14 5©75 ©6497 11.1 1.85 0 1 VO 2 43 5© 10 © 5762 -lo 1 ©91 5 0 35 0 6045 3o 4 1.33 0 1

5© 15 o 5 824 - OR© MEAN “ 5© 17 ©5847 3 TEST DETERMINATIONS

© 60 © 0673 - 3D MEANS -

o 63 © 0707 29 LABORATORIES IN GRAND MEANS

o 06 © 0C72 - AVER SDR -© 08 0 OO 88 33 LABORATORIES REPORTING

LE- IN© N-M • UNIT LB-INo N-M
MATER

I

RL

Y93-Y94

MINIMUM TORQUE

MATERIAL Y91-Y92 5.15 LB-IN. MATERIAL Y93-Y94 5-17 LB-IN.

29
INTERLABORATORY PROGRAM ON EVALUATION 0F RUBBER

REPORT 41-5 MAXIMUM TORQUE - POUND-INCHES AUGUST 1979

MATERIAL Y91-Y92 MATERIAL Y93-Y94 COMMERCIAL TIRE TREAD COMMERCIAL TIRE TREAD

LAB MEAN MEAN % REL MEAN MEAN S BEL VAR CODE F IB— IN© N-M DEV SDR LB- IN© N-M DEV SDR CODE INSTRUMENT. UNIT. OR OTHER VARIATION

V0064 22© 80 2 0 5762 -3© 1 .00 22© 95 2.5931 -2.4 .00 01 V00 74 23© 87 2© 6976 1©5 .18 23© 91 2.7022 1.7 .48 70 DATA RECEIVED LATE

VO 077 22© 95 2o 5931 -2© 5 1.54 22© 55 2. 5479 -4c 1 1.04 01

VO 079 21©95 2© 4601 -6© 7 lo67 22© 25 2.5140 -5.4 .85 01 V0083 2 5o 0 0 2© 6248 6© 2 lo 82 25o 00 2. 8248 6. 3 .57 01 V0090 23o 45 2o 6456 “o 4 lo 2 1 23© 15 2. 6157 -1.6 .39 01 V0C92 25© 15 2. 8417 60 9 .64 24© 95 2. 8191 6. 1 1.04 01 V0095 21© 55 2© 4345 -8© 4 o77 21© 80 2.4632 -7.3 1 0 24 01

VOl 00 23© 80 2.6692 lol 1.41 24© 05 2.7174 2.2 .28 01

VOl 17 22o 0 0 2© 46 56 -6© 5 oOO 22© 00 2.4858 -6© 5 .57 01

VO 1 20 24© 5

5

2.7739 4© 3 6o 22X 2 50 10 2. 8360 6.7 4o SIX 0 1 VOl 28 24©70 2© 7909 5© 0 .77 24© 50 2o 7683 4. 1 .28 01 VOl 44 24© 50 20 7683 4© 1 lo 08 240 25 2.7400 3. 1 2.27 01

VOl 46 220 80 2.5762 -3© 1 lo 16 22o 50 2.5423 -4.4 lo 71 0 1 VO 1 49 22 0 55 2o 5479 -4© 2 o 5 5 2. 2.0 52 2.5451 -4.2 .00 0 1

VO 150 24© 35 2.7513 3© 5 .88 24© 25 2. 7400 3. 1 1.71 01

VO 152 22 0 15 2. 5027 -5© 9 .35 22o 10 2.4971 -6© 1 .00 01 VOl 54 23 0 15 2. 6 157 “ 1 o 6 o 35 23 0 20 2.6214 - lo4 .57 0 1 VO 156 24o 2 0 2o7344 20 8 .53 240 50 20 7683 4© 1 .78 01

VOl 58 23© 15 2.6157 - lo 6 .47 230 00 2.5988 -2© 2 o 28 01

VO 161 21© 10 2 0 3841 — 1 0© 3 o 35 2 1 o 05 2. 37 84 - 1 Oo 5 o 57 01 VO 166 2 1 o 00 2.3728 - 10© a lo 06 2 1 o 05 2. 3784 - 10o 5 .57 01

VC 169 23© 14 2.6151 -lo7 1.39 23o 23 2.6251 - 1© 2 2.00 4 1 ORIGINAL IN DECINEWTON-METER

VOl 82 25© 35 2o 8643 7© 7 .99 25o 45 2.8756 8© 2 1. 24 0 1 VOl 90 22© 25 2o 5140 -5© 5 o 7 2 22© 32 2. 5225 -50 1 .25 01

VO 207 26©20 2.9603 1 lo 3 1.61 26© 25 2o 9660 1 1 0 6 2. 09 0 1 VO 2 08 26© 81 3. 0298 13© 9 1. 30 27© 00 3.0507 1 4o 6 2o64X 0 1 V02 11 * 25© 90 2o 926 4 1 0© 1 lo71 25 0 05 2. 8304 60 5 o 85 01 V02 13 24© 35 2.7513 30 5 o 8 4 23© 95 2.7061 lo 8 1.09 0 1 V02 17 22© 90 2. 5875 -2©7 .30 220 70 2. 5649 —3o 5 30 70X 0 1 V0221 23© 90 2 o 7001 1© 5 .82 23© 90 2.7001 lo 6 o 75 40 ORIGINAL IN NEWTON-METER

V0238 23© 00 2.5988 -2© 3 1.76 23©00 2o 5988 -2© 2 .00 0 1 VO 243 « 22 0 40 2.5310 -4© 8 o92 23© 20 2.6214 - 1 o 4 2. CO 0 1

23© 53 2.6590 - Gfi© MEAN " 23© 52 2. 6580 3 TEST DETERMINATIONS

1© 46 . 1653 - SD MEANS - 1 o 43 o 1616 32 LABORATORIES IN GRAND MEANS

o 16 .0185 - A VEfi SDS •

© 10 .0115 33 LABORATORIES REPORTING

LB-IN© N-M - UNIT LB-INo N-M

30
MATERIAL

Y93-Y94

MAXIMUM TORQUE

MATERIAL Y91-Y92 23-53 LB-IN. MATERIAL Y93-Y94 23-52 LB-IN.

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

U.S. DEPT. OF COMM. BIBLIOGRAPHIC DATA

SHEET

1. PUBLICATION OR REPORT NO. RUBBER CRP 41

4. TITLE AND SUBTITLE

INTERLABORATORY PROGRAMS FOR RUBBER

Analyses No. 41

July - September 1979

September 27, 1979

7codr“

7. AUTHOR(S) T. L. Cummings, J. Horlick, G. W. Bullman

8. Performing Organ. Report No. NBSIR 79-1811

9. PERFORMING ORGANIZATION NAME AND ADDRESS

I NATIONAL BUREAU OF STANDARDS

DEPARTMENT OF COMMERCE

WASHINGTON, DC 20234

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

15. SUPPLEMENTARY NOTES

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

16. ABSTRACT (A 200-word or leas factual summary of moat 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 fsix 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 I Unlimited

p^Tpor Official Distribution. Do Not Release to NTIS

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

20402, SD Stock No. SN003-003-

I I 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

27

22. Price

USCOMM-DC