74'!} 7 7

INTERLABORATORY PROGRAMS

FOR RUBBER

ANALYSES NO. 39

JANUARY MARCH 1979

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

Analyses No. 39

January - March 1979

J. Horlick

Office of Testing Laboratory Evaluation Technology

Office of Engineering Standards

National Engineering Laboratory

T. L. Cummings, Research Associate,

Collaborative Testing Services, Inc.

G. W. Bullman

Polymers Science and Standards Division

Center for Materials Research

National Measurement Laboratory

U. S. DEPARTMENT OF COMMERCE

National Bureau of Standards

NBSIR 79-1377

INTRODUCTION

This report summarizes the test results for the first 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.

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

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

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

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

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

Jeffrey Horlick, Administrator

NBS Collaborative Reference Programs

Office of Testing Laboratory Evaluation Technology

June 27, 1979

TABLE OF CONTENTS

Page

Introduction

Table of Contents 1

Key to Tables and Graphs 2

Program 1: Tensile strength, ultimate elongation

and stress at 300% elongation 5

Program 2: Hardness 13

Program 4: Mooney Viscosity 17

Program 5: Vulcanization characteristics determined

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

LAB CODE Confidential laboratory identification number known only

to the participant and the Collaborative Reference Program

staff

.

F A flag identifying results that are extreme in comparison

with the other results.

X - The plotted point for the indicated laboratory lies

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

assuming normal distribution, 99% of laboratories

similar to those participating in the program will

be represented by points lying within the 99% ellipse.

* - The plotted point for the indicated laboratory lies

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

inside the 99% ellipse.

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

sheets or samples of the same material.

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

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

GR. MEAN.

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

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

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

of environmental conditons, procedure, unit used, or other

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

and procedure specified at the top of the page either explicitly

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

top of the first column of data. A '+' in front of the VAR COD]

indicates that the data has been excluded from the grand means

due to a non-standard variation of the possibilities mentioned

above, or the data is extreme.

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

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

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

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

within laboratory replication, excluding those excluded

from the GR. MEAN and excluding any additional ones for

which the REL SDR has been flagged.

GRAPH

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

SUMMARY OF ANALYSES

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

LABS OMIT Number of laboratories reporting data but excluded from

the GR. MEANs*

STANDARD DEVIATIONS

LABS Same as the SD MEANs (see above)

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

REPL Same as AVER SDR (see above)

PRECISION OF METHODS

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

as specified in the Collaborative Reference Program.

REPL ASTM The number of replicate measurements specified for a test

result in the designated ASTM Standard.

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

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

result: two test results obtained by the same technician on

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

the time to agree within the repeatability.

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

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

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

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

MEANS.

4
FEP6RT 39 1 INTERLABORATORY PR0GRA M ON EVALUATION OF RUBBER FEBRUARY 1979

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

NOTES

Materials A91 and A92 were sheets of the same vulcanized rubber. Similarly, materials A93 and A94 were alike.

V100 results were obtained at NBS using a pendulum tester.

All participants used Die C in ASTM D 412 with the following exceptions:

V126 used Die 2 in BS903

V208 did not specify a Die V225 used ASTM Die D

INSTRUMENTS

Instrument Number of Labs Percent

Electronic Manual 20 33% Electronic Automatic 19 32% Pendulum Manual 18 30% Pendulum Automatic 3 5%

60 100%

RELATIVE HUMIDITY

Relative Humidity Number of Labs Percent

Below 45% 17 28% Above 55% 12 20% 45% - 55% 22 37% Not specified 9 15%

60 100%

SUMMARY OF ANALYSES

LABS LABS STD DEVIATIONS

PROPERTY MATERIAL INCL OMIT OR, MEAN LABS SHEETS REPL UNITS N

TENSILE A91-A92 54 6 <2712. 95. 42. 6C« POUNDS PER SQUARE INCH STRENGTH A93-A94 54 6 271 2. 96. 37. 58. POUNDS PER SQUARE INCH TENSILE A 9 I-A92 54 6 18. 71 .66 .29 .42 MEGAPASCALS

STRENGTH A93-A94 54 6 18.70 .66 .26 .40 MEGAPASCALS

ULTIMATE A91-A92 57 3 624. 22. 7. 15. PERCENT ELONGATION A93-A94 57 3 619. 23. 6. 14. PERCENT

STRESS AT A91-A92 56 4 1 163. 73. 13. 25. POUNDS PER SQUARE INCH 300% ELONGATION A93-A94 56 4 1 162. 70. 14. 28. POUNDS PEP SQUARE INCH STRESS AT A9 t -A92 56 4 8.018 . 503 .114 . 1 7 5 MEGAPASCALS 300% ELONGATION A93-A94 56 4 e.oiT .483 .122 .196 MEGAPASCALS

REPORT 39 - l

I N TER LABORATORY PROGRAM ON EVALUATION OF RUBBER PRECISION OF METHODS FEBRUARY 1979

REPL REPL ABSOLUTE

PROPERTY MATERIAL CRP ASTM GR. MEAN REPEAT REPR6D UNITS REPEAT REPF3D TENSILE A9 1 »A92 5 5 2712. 167. 264. PSI 6.2 9.7 STRENGTH A93-A94 5 5 2712. l60 o 265. PSI 5.9 9.8 TENSILE A91-A92 5 5 18.71 W 15 I.e2 MEGA PA 6.2 9.7 STRENGTH A93-A94 5 5 1 8.70 1. 10 1. 83 MEGAPA 5.9 9.8

ULTIMATE A91-A92 5 5 624. 41. 60. % 6.6 9.6 ELONGATION A93-A94 5 5 619. 36. 64. % 6.2 10.3

STRESS AT A9 I-A92 5 5 1 163. 7 0o 202. PSI 6. 0 17.4 ELONGATION A93-A94 5 5 1 162. 79. 194. PSI 6.8 16.7 STRESS AT A9I-A92 5 5 8.018 .4 84 1.393 MEGAPA 6.0 17.4 ELONGATION A93-A94 5 5 8.017 .543 1.337 MEGAPA 6. 8 16.7

5
INTERLABORATORY PROGRAM ON EVALUATION OF RUBBER

REPORT 39-1 TENSILE STRENGTH - POUNDS PER SQUARE INCH FEBRUARY 1979 MATERIAL A91-A92 MATERIAL A93-A94 COMMERCIAL TIRE TREAD COMMERCIAL TIRE TREAD

LAB MEAN MEAN « REL MEAN MEAN » REL VAR CODE F PSI MEGAPA DEV SDR PSI MEGAPA DEV SDR CODE INSTRUMENT, UNIT, OR OTHER VARIATION

V0062 • 2 4 55# 16.93 -9.5 .66 2475. 17.07 -8.7 .48 0 1 V0067 2590# 17.66 -4.5 2.47X 2630. 18. 14 -3.0 .72 0 1 V0069 269 1. 18.56 -.8 1.38 2773. 19.12 2.3 2.12X 01 V0070 2840. 19.59 4.7 1.06 2 840. 19.59 4.7 .56 01 V0071 2631. 18.15 -3.0 3.40X 2678. 18.47 -1.2 1.38 C 1

VO 072 2765. 19.07 1.9 .76 2735. 1 8.86 .9 1.29 70 DATA RECEIVED LATE

V0073 2762. 19.05 1.8 1.14 2762. 19.05 1.9 1.68 01 VO 0 76 2820. 19.45 4.0 1.24 2785. 19.21 2.7 1.66 0 1 V0078 2547. 17.57 -6. 1 1.10 2568. 17.71 -5.3 1.03 01

VO 0 83 2632. 18. 16 -2.9 .41 2610. 1 6.00 -3. 8 .58 01

VO 0 84 2705. 18.66 -.3 1.97X 2760. 19.03 1.8 2.07X 01

VO 0 85 2741. 18.90 1.1 .96 2722. 1 8.77 .4 1.49 20 ORIGINAL IN MEGANEBTONS PER SO. METER

VO 0 87 2715. 18.72 . 1 1.23 2690. 1 8.55 -.8 1.06 01

VO 0 88 X 2246. 15.49 -17.2 1.61 2240. 1 5.45 -17.4 .80 01 V0092 2685. 16.52 - 1 .

0

1 .43 2720. 1 8.76 .3 1.06 01 V0095 2825. 19.48 4.2 1.21 2613. 19.40 3.7 l. 17 01 VOl 00 * 2720. 18.76 .3 1.39 2840. 19.59 4.7 .76 01 VOl 02 2590. 17.86 -4.5 1.24 2605. 17.97 -3.9 .78 C 1 VOl II 2795. 19.28 3. 0 1 .07 2810. 19.38 3. 6 .82 70 DATA RECEIVED LATE

VOl 17 2675. 18.45 -1.4 .72 2655. 18.31 -2. 1 1.20 01

VO 123 2785. 19.21 2.7 . 83 2745. 18.93 1.2 .89 01 VOl 26 2879. 19.86 6. 1 1.0 1 2835. 19.56 4.6 1.01 20 ORIGINAL IN MEGANEWTONS PER SO. METER

VOl 28 2805. 19.34 3.4 .74 2855. 19.69 5.3 1.36 01 VOl 41 2769. 19.10 2. 1 1.05 2722. 18.78 .4 1.00 0 1 VOl 44 2875. 19.83 6. 0 1 .00 2690. 19.93 6.6 1.10 01

VO 1 44B 2835. 19.55 4.5 .66 2965. 19.76 5.6 .67 01 VOl 46 2708. 18.68 -. 1 .46 2620. l 8. 07 -3.4 1.47 01 VOl 49 2618. 18.06 -3.5 1.52 2662. 1 8.36 -1.8 .89 01

VO 1 50 2687. 18.53 -.9 .76 27 67. 19.09 2. 1 .81 01 VOl 52 2900. 20.00 6.9 1.08 2865. 19. **6 5.6 1.41 01

VO 153 2622. 18.09 -3. 3 i. es 2640. 18.21 -2.6 .85 01

VO 1 54 2950. 19.66 5. 1 .40 28 15. 19.41 3. 8 .47 01

VO 1 56 2755. 19.00 1.6 1.20 26 15. 19.41 3. 8 .88 01

VOl 58 2756. 19.00 1.6 1.15 2777. 19. 15 2.4 .68 20 ORIGINAL IN MEGANEWTONS PER SO. METER

VO 160 2558. 17.64 -5.7 1.69 2593. 17.68 -4.4 .99 20 ORIGINAL IN MEGANEWTONS PER SO. METER

VO 1 64 2729. 16.82 .6 .95 2700. 18.62 -.4 .80 0 1 VO 166 2723. 1 8.78 .4 1.22 2712. 18.71 .0 .92 01

VOl 68 2846. 19.63 *.9 .46 2832. 19.53 4.4 1.08 01 VOl 69 27 12. 18.70 -. 0 1.07 2756. 19.00 1.6 1.78 20 ORIGINAL IN MEOANEWTONS PER SO. METER

VO l 76 2645. 18.24 -2.5 .56 2610. 1 8.00 -3. 8 .58 01

VO 1 84 26 39. 18.20 -2.7 .72 2625. 18. 10 -3.2 .82 01 VO 190 2750. 18.97 1.4 1.41 2763. 19.06 1.9 1.40 0 l VO 199 26 47. 18.26 -2.4 1.33 2700. 1 8.62 -.4 .73 01

VO 2 08 269 0. 18.55 -.8 .91 2669. 1 8.40 - 1.6 1.25 20 ORIGINAL IN MEGANEWTONS PER SO. METER

V0213 2704. 18.65 -.3 .75 2670. 1 9.41 -1.5 1.13 20 ORIGINAL IN meganewtons PER SO. METER

V02 14 27 27. 18.80 .5 1.20 2756. 19.00 1.6 .67 20 ORIGINAL IN MEOANEWTONS PER SO. METER

V02 19 X 3149. 21.72 16. 1 1.53 3036. 20. 94 12. 0 1.81 01

VO 2 23 2660. 18.34 -1.9 .77 2645. 18.24 -2.5 l.CO 0 1 V0224 2795. 19.28 3.0 2.95X 2725. 1 8. 79 .5 1.42 01

VO 2 25 2565. 17.69 -5.4 2 . 0 1 X 2547. 1 7.57 -6. 1 1.30 0 1

VO 2 32 269 2. 18.57 -.7 .85 2700. 1 8.62 -.4 .92 01

VO 2 33 2767. 19.08 2.0 .93 2692. 1 8.57 -.7 2.04X 01 V0235 27 27. 18. 81 .6 1.03 2654. 18.31 -2. 1 1.29 01 V0238 X 31 10. 21.45 14.7 2.27X 3C07. 20.74 10.9 1.61 0 1 V0243 27 27. 16. 81 .6 .75 2717. 18.74 .2 .67 01

VO 2 44 2795. 19.28 3.0 .64 2799. 19.31 3.2 .62 20 ORIGINAL IN .MEGANEWTONS PER SO. METER

V0245A 2567. 17.71 -5.3 1.04 2524. 17.41 -6.9 .44 01 V0245B 2569. 17. 86 -4. 5 .64 2 560. 1 7.66 -5.6 1.57 01

VO 2 49 2635. 18.17 -2.9 .99 2640. 1 8.21 -2.7 1. 14 70 DATA RECEIVED LATE

V0250 2737. 18.68 . 9 1.18 2687. 18.53 -.9 .52 0 1

27 12. 16.71 - GR. MEAN - 2712. 18.70 5 TEST DETERMINATIONS

95. .66 • SD MEANS • 96. .66 54 LABORATORIES IN GRAND MEANS

60. • 42 • AVER SDR • 58. .40 60 laboratories reporting

PSI MEGAPA - UNIT PSI MEGAPA

6
114

112

110

108

106

104

1 02

100

98

96

94

92

go88

86 -

TENSILE STRENGTH

MATERIAL A91-A92 2712. PSI MATERIAL A93-A94 2712. PSI

MATERIAL A91-A92

7
REPORT 39 1 INTERLA30RAT6RY PROGRAM ON EVALUATION OF RUBBBR ULTIMATE ELONGATION - PERCBNT FEBRUARY 1979 MATERIAL A91-A92 MATERIAL A93-A94 COMMERCIAL TIRE TREAD COMMERCIAL TIRE TREAD

LAB MEAN % REL MEAN % REL VAR CODE F ft DEV SDR ft DEV SDR CODE

VO 062 603. -3,3 .47 596. -3.3 .59 01 V0067 605* -3,1 2.34X 610. -1.4 .64 01 V0069 e 630. ,9 1.40 655. 5.9 2.47X 01 V0070 615* -1.5 .57 617. -.2 .64 01

VO 07

1

604 « -3, 1 3.13X 597. -3.4 1.46 01 V0072 605. -3.1 .93 595. -3.8 .95 70 VO 073 645# 3.3 1.22 640. 3.4 1.59 01

VO 076 605* -3. 1 1.14 590. -4.6 1.51 01 V0078 620* -.7 1.17 615. -.6 1. 14 01 V00 83 635* 1.7 .75 622. .6 .54 01

VO 0 84 600* -3.9 1 • 38 600. -3.0 1. 16 01

VO 0 85 662* 6. 1 .57 650. 5.1 1.40 0 1 VO 0 87 607* -2.7 1.51 609. -1.6 .99 01 V0088 * 596* -.5 2.73X 567. -8.3 1.02 01

VO 0 92 630. .9 1.09 635. 2.6 .89 01

VO 095 630* .9 1.36 615. -.6 1.32 01

VO 100 640* 2.5 1.32 640. 3.4 .92 01

VO 1 02 625* . 1 .79 625. 1.0 .61 01

VO 1 11 632. 1.3 1.08 631. 2. 1 .73 70

VO 1 17 625. .1 1.05 62 0. .2 1.66 01

VO 123 640. 2.5 .75 625. 1.0 • 84 01

V01 26 662. 6. 1 1. 16 646. 4.5 1. 17 01

VO 128 625. . 1 .88 630. i.e .71 01

VO 141 625. .1 .62 61 0. -1.4 .42 0 1 VO 1 44 650. 4. 1 .66 635. 2.6 1.05 01

VO 144B 640. 2.5 .81 630. 1.8 .73 01

VO 1 46 612. -1.9 1.01 597. -3.4 1.34 01 V01 49 6 17. -1.1 1.38 612. -1.0 .67 0 1 VO 150 620. -.7 .48 630. 1.8 .60 01 VO 1 52 615. -1.5 1.10 610. -1.4 1.30 01

VO 153 610. -2.3 .95 625. 1.0 .47 01

VO 154 605. -3. 1 .46 590. -4.6 .67 01

VO 156 605. -3. 1 1.24 600. -3.0 1.55 01

VO 158 675. 8.2 1.38 665. 7.5 .58 C 1 VO 160 605. -3. 1 1.24 620. .2 .91 01

VO 164 602. -3.5 .97 592. -4.2 .20 01

VO 166 605. -3. 1 .83 610. -1.4 .56 01

VO 168 645. 3.3 .55 630. 1.8 .87 01

VO 169 635. 1.7 1.28 640. 3.4 1.49 01

VO 176 625. . 1 .83 615. -.6 .84 01

VO 1 84 620. -.7 .66 620. .2 . 88 0 1 VO 190 640. 2.5 1.00 640. 3.4 1.49 01

VO 1 99 625. . 1 1.32 61 0. -1.4 1. 08 01

VO 2 08 600. -3.9 .84 565. -5.4 .77 0 1 VO 213 633. 1.4 .90 632. 2.2 l. 17 01 V02 14 640. 2.5 1.64 650. 5. 1 .70 01 V02 19 615. -1.5 1.49 61 0. -1.4 1. 00 0 1 V0223 615. - 1 . S 1.12 62 0. .2 1. 10 0 1 V0224 652. 4.5 1.72 630. 1.8 1.27 01

VO 2 25 * 565. -9.5 1.32 555. -10.3 1.22 01 V0232 650. 4. 1 .99 660. 6.7 1.16 01 V0233 620. -.7 .94 605. -2.2 2. 24X 01 V0235 666. 6. e .95 651. 5.2 1. 57 01 V0238 • 635. 1.7 1.37 60 0. -3.0 1. 09 01 V0243 645. 3.3 .45 645. 4.3 .67 01 V0244 640. 2.5 .39 640. 3.4 . 00 01 V0245A 570. -8.7 .68 570. -7.9 . 87 01 V0245B 610. -2.3 .93 60 0. -3.0 1. 74 01 V02 49 650. 4.1 .88 655. 5.9 .50 •70 V0250 635. 1.7 .91 62 0. .2 .39 01 624. - OR. MBAN • 619.

22. * SD MEANS * 23. 5 15. • AVER SDR • 14. 6

ft • UNIT ft

INSTRUMENT, UNIT, OR OTHER VARIATION

DATA RECBIVED LATE

DATA RECEIVED LATE

DATA RECEIVED LATE

TEST DETERMINATIONS LABORATORIES IN O RAND MEANS LABORATORIES REPORTING

8
700

680

660

640

620

600

580

560

540

520

5

ULTIMATE ELONGATION

/

0 560 580 600 620 640 660

MATERIAL A91-A92

680 700 720

8
INTERLABORATORY PROGRAM ON EVALUATION OF RUBBER

REPORT 39-1 STRESS AT 300* ELONGATION - POUNDS PER SQUARE INCH FEBRUARY 1979 MATERIAL A91-A92 MATERIAL A93-A94

COMMERCIAL TIRE TREAD COMMERCIAL TIRE TREAD

LAB MEAN MEAN a REL MEAN MEAN « REL VAR CODE F PSI MBGAPA DEV SDR PSI MEGAPA DEV SDR CODE INSTRUMENT, UNIT, OR OTHER VARIATION

V0062 1120. 7.724 -3.7 1.03 1 1 15. 7.690 -4. 1 .74 01 V0C67 1187. 8. 190 2. 1 .52 1185. 8. 172 1.9 .58 01 VO 069 1129. 7.786 -2.9 2. 16X 1 113. 7.676 -4.2 .84 01 V0070 1190. 8.207 2.4 .69 1190. 8.207 2.4 1.03 0 1 V0071 1195. 8.241 2. 8 1.78 1 2 55 0 8.659 S. 0 1.42 01 V0072 1140. 7. 862 -1.9 1.08 1150. 7.93 1 -1. 1 1.09 70 DATA RECEIVED LATE

VO 073 1162. 8.017 -.0 2.65X 1150. 7.931 -1.1 1.83 01 VO 076 1300. 8.966 1 1.8 1.11 1295. 8.931 11.4 .80 0 1 V0078 1078. 7.434 -7.3 1 .09 1072. 7.397 -7.7 .83 01

VO 0 83 1 132. 7. 81 0 -2.6 .7 1 1 145. 7. 897 -1.5 .60 01

VO 0 84 1185. 8. 172 1.9 1. 52 1175. 8. 103 1. 1 .79 01

VO 0 85 1076. 7.422 -7.4 l.OS 1095. 7.552 -5. 8 .62 20 ORIGINAL IN MEG ANEWTONS PER SO. METER

VO 0 87 1255. 8.655 7.9 1.11 1225. 8.448 5.4 .75 01 VO 0 88 * 939. 6.479 -19. 2 2. 0 1

X

978. 6. 748 -15,8 1.32 01 V0092 1025. 7. C69 -11.8 .63 1 035. 7. 138 -11.0 .92 01 V0095 1212. 8.362 4.3 1.24 1212. 8.362 4.3 1.02 01

VOl 00 1120. 7.724 -3.7 1.27 1 160. 8. 000 -.2 .84 01 V0 1 02 1040. 7. 172 -10.5 .74 1030. 7. 103 -11.4 .71 0 1 VO l 11 1165. 8. 034 .2 .84 1170. 8. 069 .7 .51 70 DATA RECEIVED LATE

VOl 17 1155. 7.966 -.7 .83 1 1 50. 7.931 -1. 1 .60 0 1

VO 123 1215. 8.379 4.5 .66 1195. 8. 24 1 2.8 .58 01 VO 126 1146. 7.902 -1.4 .4 1 1 1 36. 7. 837 -2.2 1. 10 20 ORIGINAL IN MEGANEWTONS PER SO. METER

VOl 28 1220. 8. 41 4 4.9 1.17 1225. 8.448 5.4 .67 01 VOl 41 1248. 8.61 0 7.4 .88 1239. 8.545 6.6 .43 01

VOl 44 11 10. 7.655 -4.5 1.03 1 165. 8. 034 . 2 1.26 01 V0144B 1 155. 7. 966 -.7 .92 1220. 8.414 5.0 1.84 0 1 VO 146 1216. 8.390 4.6 1.47 1177. 8. 1 17 1.3 1.06 01

VOl 49 * 1056. 7.2e6 -9. I 1.21 1 138. 7. 848 -2. 1 .94 0 1 VO 150 1187. 8. 190 2. 1 .96 1 200. 8. 276 3.2 1.07 01 VO 152 1225. 6.448 5.4 .41 1235. 8.517 6.2 .53 01

VOl 53 1145. 7.900 -1.5 l. 17 1164. 8. 031 .2 1.31 01 VOl 54 1250. 8.621 7.5 .7 1 1230. 8. 483 5.8 .58 01 VOl 56 1245. 8. 586 7. 1 1.45 1255. 8.655 8. 0 1.21 0 1 VOl 58 1066. 7.352 -8.3 .97 1 073. 7. 402 -7.7 .72 20 ORIGINAL IN MEGANEWTONS PER SO. METER

VO 160 1189. 8.202 2.3 1.18 1 1 82. 6. 152 1.7 .95 20 ORIGINAL IN MEGANEWTONS PER SO. METER

VO 164 1 132. 7.810 -2.6 2.36X 1 132. 7. 807 -2.6 1.39 01 VO 166 1131. 7. 803 -2.7 1.03 1113. 7.679 -4.2 1.25 01

VO 168 1164. 6.028 . 1 .62 1 175. 8. 107 1. 1 .46 01 VO 169 1153. 7.952 -. 8 1 .56 1 146. 7.902 -1.4 1.12 20 ORIGINAL IN MEGANEWTONS PER SO. METER

VO 176 1220. 6.414 4.9 1 .07 12 10. 8. 345 4. 1 1.37 01

VO 1 84 1140. 7. 862 -1.9 .96 1 1 36. 7.838 -2.2 1.09 0 1 VO 190 1182. 6. 152 1.7 1.71 1 1 57. 7.979 -.5 .89 0 l VO 199 1172. e. 086 .9 .96 1 172. 6. 066 .9 .94 0 1 V0208 1226. 8. 452 5.4 2. 17X 1276. 8. 802 9. 8 1.52 20 ORIGINAL IN MEGANEWTONS PER SO. METER

V02 13 1 1 74. 8. 097 1.0 1.39 1 1 23. 7.747 -3.4 . 80 20 ORIGINAL IN MEGANEWTONS PER SO. METER

V0214 1117. 7.702 -3. 9 .38 1 124. 7.752 -3.3 .41 20 ORIGINAL IN MEGANEWTONS PER SO. METER

V0219 * 1348. 9.297 15.9 1.66 1333. 9. 193 14.7 1.53 0 1 V02 23 1115. 7.690 -4. 1 1. 14 1 1 30. 7.793 -2.8 1.40 01

VO 2 24 1212. 8.362 4.3 1.44 12 15. 8.379 4.5 1.73 0 1 V0225 1291. e.903 11.0 .98 1265. 8.724 8. 8 1.34 0 1

VO 2 32 * 1140. 7. 862 -1.9 .26 1072. 7.397 -7.7 . 16 0 1 VO 233 1205. 8. 314 3.7 .96 1 1 82. 8. 155 1.7 1.02 01 V0235 1068. 7.503 -6. 4 .75 1066. 7.355 -8.3 .77 0 1 V0238 X 1042. 7. 190 -10.3 .88 1232. 8. 500 6. 0 1. 30 01 VO 2 43 1046. 7.214 -1 0. 0 .69 1 039. 7. 169 -10.6 1. 04 0 1

VO 244 1227. 8. 462 5.5 .75 1210. 8.342 4. 1 1. 1 1 20 ORIGINAL IN MEGANEWTONS PER SO. METER

V0245A 1167. 8. 052 .4 2.05X 1 1 59. 7.997 -.2 1.31 0 1 V0245B 11 23. 7. 748 -3.4 1.01 1 1 37. 7. 845 -2. 1 .96 01 VO 2 49 1040. 7. 172 -1 0.5 .65 1010. 6. 966 -13. 1 .72 70 DATA RECEIVED LATB

V0250 1150. 7.93 1 -1.1 .76 1 100. 7. 586 -5.4 1.06 0 1

1163. 8.018 “ GR. MEAN " 1 162. 8.017 5 TEST DETERMINATIONS

73. .503 - SD MEANS - 70. . 483 56 LABORATORIES IN GRAND MEANS

25. • 175 • AVER SDR - 28. . 196 60 LABORATORIES REPORTING

PSI MEGAPA - UNIT PSI MEGAPA

10
1450

1400

1350

1300

1250

1200

1150

1100

1050

1000

950

900

STRESS RT 3007. ELONGATION

IflL A91-A92 1163. PSI MATERIAL A93-A94 1162. PSI

MATERIAL A91-A92

l

REPORT 39 2 INTERL ABORAT ORY PROGRAM ON EVALUATION OF RUBBER FEBRUARY 1979

HARDNESS

NOTES

Materials A91 and A92 were sheets of the same vulcanized rubber. Similarly, materials A93 and A94 were alike.

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

were obtained at NBS using ASTM D1415.

Four of the 31 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 OMIT GR. MEAN LABS SHEETS REPL UNITS

HARDNESS A91-A92 29 2 58, 16 1.42 .20 .54 IRHD A93-A94 29 2 58, 16 1.74 .28 .47 I PHD

REPORT 39-2

INTERLABORATORY PROGRAM ON EVALUATION OF RUBBER PRECISION OF METHODS FEBRUARY 1979

RE PL PEPL ABSOLUTE PERCENT

PROPERTY MATERIAL CRP ASTM GR, MEAN REPEAT REPR6D UNITS REPEAT REPROD HARDNESS A91-A92 5 5 58, 16 1,50 3.94 IRHD 2.6 6,8

A93-A94 5 5 58, 16 1.32 4. ei IRHD 2.3 8.3

13
INTERLABORATORY PROGRAM ON EVALUATION OF RUBBER

REPORT 39 - 2 HARDNESS - IRHD FEBRUARY 197-5 MATERIAL A91 -A92 MATERIAL A93 -A94 COMMERCIAL TIRE TREAD COMMERCIAL TIRE TREAD

LAB MEAN « REL MEAN « REL VAP CODE F IRHD DEV SDR IRHD DEV SDR CODE INSTRUMENT. UNIT, OR OTHER VARIATION

V0062 60.00 3.2 .00 61.50 5.7 .58 0 1 VO 069 58.00 -.3 1.43 58. 00 -.3 l. 15 01 V0070 56.50 -2.8 3.72X 57.50 -1.1 2. 35X 01

VO 071 57.00 -2.0 1.07 57.5 0 -1.1 1. 46 01

VO 072 56.50 -2.8 1.28 57.00 -2.0 .00 70 DATA RECEIVED LATE

V0078 57.50 -1.1 1. 28 58. 00 -.3 1.41 01

VO 0 84 59.00 1.4 .41 58. 00 -.3 1. 05 01 V0085 59.35 2.1 1. 19 58.55 .7 .72 0 1 VO 0 87 61.00 4.9 .00 61.50 5.7 .00 01 V0088 58.00 -.3 1.28 58. 00 -.3 1.46 01 V0092 58.50 .6 1.24 60.00 3.2 2. 23X 01 V0095 57.50 -1.1 • 51 57. 50 -1.1 .47 0 1 V01 00 55.25 -S.0 .58 54.25 -6.7 .61 01

V01 02 59.50 2.3 1.33 59.50 2.3 2.03X 0 1 V01 11 59.00 1.4 • 92 59. 00 1.4 .58 70 DATA RECEIVED LATE

VO 128 57.00 -2.0 1.01 56.50 -2.8 .58 0 1 VO 141 57.00 -2.0 .83 56.50 -2.8 1.05 01 VO 144 58.50 .6 1.34 58.00 -.3 1. 20 01 VO 1 44B 58.50 .6 1.62 5 8.50 .6 1.05 01 VO 1 68 59.75 2.7 • 41 60.25 3.6 .61 0 1

VO 169 57. OC -2.0 • 41 57.00 -2.0 1.05 01

VO 176 57.75 -.7 1.26 57.50 -1.1 .81 0 1 V01 90 60.00 3.2 • 41 60.50 4.0 1. 15 01 V0200 55.65 -4.3 • 62 54.50 -6.3 .50 0 1 V0208 57.30 -l.S 1. 28 56.90 -2.2 1.73 01

VO 214 60.00 3.2 1.73 59.35 2. 1 2. 5 IX 01 V0224 60.00 3.2 1.07 60. 00 3.2 1.69 01

VO 2 33 58.50 .6 1.33 59.00 1.4 1. 35 01 V0235 56.50 -2.8 .33 56.75 -2.4 .91 01 VO 2 43 57.50 -1.1 .00 57.5 0 -1.1 .47 0 1

VO 244 58.50 .6 1.01 58.00 -.3 .94 0 1

58. 16 - GR . MEAN - 58. 16 5 TEST DETERMINATIONS

1.42 - SD MEANS • 1*74 29 LABORATORIES IN GRAND MEANS

.54 - AVER SDR -

• 47 31 LABORATORIES REPORTING

IRHD - UNIT IRHD

14
65

64

63

62

61

60

59

58

57

56

55

54

53

52

HRRDNESS

15

REPORT 39 INTERLABORATORY PROGRAM ON EVALUATION OF RUBBER

MARCH 1979

MOONEY VISCOSITY

NOTES

Materials R91 and R92 were the same rubber. Similarly, materials

R93 and R94 were the same rubber. No sample preparation was required

for materials R91 and R92 whereas, mill massing was required for materials R93 and R94.

V100 results were obtained at NBS on the manually closed viscometer

used for determining the Mooney viscosities of the standard rubbers.

SUMMARY OF ANALYSES

LABS LABS STD DEVIATIONS

PROPERTY MATERIAL INCL OMIT GR. MEAN LABS SHEETS REPL UNITS

MOONEY R91-F92 40 2 67.58 2.54 . 15 .30 ML ISCOSITY B93-R94 40 2 63.97 3. 89 .53 .48 ML

INTERLABORATORY PROGRAM ON EVALUATION OF RUBBER

REPORT 39-4 MARCH 1979 PRECISION OF METHODS

REPL REPL ABSOLUTE PERCENT

PROPERTY MATERIAL CRP ASTM GR, MEAN REPEAT REPROD UNITS REPEAT PEPROD

MeONEY F91-R92 3 3 67.50 .83 7.02 ML 1.2 10.4 VISCOSITY R93-F94 3 3 63.97 1.34 10.77 ML 2. 1 16.8

17
REPORT

LAB CODE

V0061

VO 068

VO 07

1

V0072

VO 077

VO 0 78

VO 0 83 V0085

V0090

V0092

VO 095

VO 100

VO 1 1

1

VO 1 17 V01 28

VO 1 44

VO 1 46

V01 49

V01 50

V0 1 56

VO 166

VO 1 69

VO 177

V0 1 82

V01 90 V0207

V0208

V02 1 1 V02 13 V02 14

V02 17 V02 18 V0220

V0221 V0223

V0230

VO 2 36 V0238

V0244

V0249

VO 250 V0251

39-4

INTERLAB6RAT0RY PROGRAM ON EVALUATION OF RUBBEP MOONEY VISCOSITY - ML MARCH 1979

F

*

MATERIAL R91 -R92 MATERIAL R93 -R94 BUTYL RUBBER SBR

MEAN % REL MEAN % REL

ML DEV SDR ML DEV SDR

66. 60 -1.5 1.52 65.20 1.9 1.55 72*00 6.5 5.92X 73.00 14.1 2. 78X 66*95 -.9 .62 65.50 2.4 .63

67*00 -.9 4.24X 54.00 -IS.

6

1.63 66*30 -1.9 .48 56.40 •11.8 5. 10X 60*00 -11.

2

2.62X 60.05 -6.1 .60 69.50 2.8 .98 67. 15 5.0 2. 47X 73.75 9. 1 .97 66.50 4.0 1.31 69.75 3.2 .97 63. 50 -.7 .90

67.00 -.9 1.94 61.50 -3.9 1. 20 68*25 1.0 .97 63.50 -.7 .90

69. 10 2.2 .54 63. 7C -.4 .34 60.50 -10.5 1.74 60.65 -5.2 . 85 67.25 -.5 1.81 64. 00 .0 2. 1 8 70*75 4.7 1.32 68.50 7. 1 .60 69.50 2.8 .CO 65.00 1.6 1.04

69. CO 2. 1 .48 66. 25 3.6 .52

68. 10 .8 .62 67. 05 4.8 1.96 68.00 .6 .97 62. 00 -3. 1 5.77X

65.50 -3. 1 .97 6 3.50 -.7 1.20 68.75 1.7 1.68 68.25 6.7 .90 70*75 4.7 .48 69.5 0 8.6 . 82 64*45 -4.6 .54 62.30 -2.6 1. 07 69.00 2. 1 .48 65.50 2.4 .00

68.10 .8 .76 6 1.25 -4.3 .83

71.20 5.3 . 19 6 8.30 6. 8 1.08 67.50 -. 1 .97 66. 00 3.2 1. 20 69.00 2. 1 .00 66. 50 4.0 .60 66.25 -2.0 1.45 66. 00 3.2 .60 65.00 -3.8 1.32 65*00 1.6 .90 66.50 -1.6 .97 63.50 -.7 .30 69.55 2.9 1.0 1 67. 35 5.3 .56 66.95 -.9 1.51 59.60 -6.8 .45 67.55 -. 1 .36 6 4.20 .4 . 83 66.50 - 1.6 .84 65.50 2.4 1.63 69.00 2. 1 . 86 56.30 -12.0 .73 71.00 5. 1 .97 66. 00 3.2 2. 39 64.00 -S.3 .00 56. 00 -12.5 .60 65.00 -3. 8 2.9 1 X 6 1. 50 -3.9 1.20 64.00 -5.3 1.77 67. 50 5. 5 1. 04 68.75 1.7 .76 65.30 2. 1 .73 67.55 -.1 1.91 64. 45 .8 1.53

67. 58 - GR . MEAN • 63.97

2.54 • SD MEANS - 3. 89

.30 • AVER SDR “ *48

ML - UNIT ML

VAR CODE INSTRUMENT, UNIT, OR OTHER VARIATION

0101

0101

01

01

01 70 DATA RECEIVED LATE

01

01

01

0101

0 1 0 1

0 1 01

Cl01

01

0 1 01

01

0 1 01

0 1 01

0 1 01

0 1

010 1 01

01

01

0 1 0 1 0 1 01 **0 DATA RECEIVED LATE

01

0 1

3 TEST DETERMINATIONS

40 LABORATORIES IN GRAND MEANS

42 LABORATORIES REPORTING

18
78

76

74

72

70

68

66

64

62

60 -

58

56 -

54

52 -

50 -

M00NEY VISCOSITY

54 56 58 60 62 64 66 68 70 72 74 76 78 80 82

MATERIAL R91-R92

19

REPORT 39 5 INTEfi LABORATORY PROGRAM ON EVALUATION OF RUBBER

MARCH 1979

VULCANIZATION CHARACTERISTICS USING OSCILLATING DISK CURE METER

NOTES Materials W91 and W92 were the same rubber formulation. Similarly, materials W93 and W94 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 GR # MEAN LABS SHEETS REPL UNITS

SCORCH *9 1-W92 35 6 4 # 633 .267 .023 .077 MINUTES

TIME W93-W94 35 6 4.642 .286 • 021 .050 MINUTES

CURE TIME W91-W92 35 6 6.73 .32 • 03 .07 MINUTES

( 50% MH ) W93-W94 35 6 6.68 .31 o 02 . 06 MINUTES

CURE TIME W9 1-W92 35 6 10.32 .53 .06 . 1 1 MINUTES

( 90% MH ) W93-W94 35 6 10. 26 .55 .03 .09 MINUTES

MINIMUM W91-W92 37 4 5. 07 .46 .04 .08 POUND-INCHES

TORQUE W93-W94 37 4 5.01 .42 . 03 .07 POUND- INCHES MINIMUM W9 1-W92 34 7 .5726 . C 52

1

.005 8 .00 86 NEWTON- METERS

TORQUE W93-W94 34 7 . 5664 .0472 .0039 .0077 NEWTON-METERS

MAXIMUM W9 1-W92 38 3 23. 52 1. 57 . 06 .13 POUND-INCHES

TORQUE W93-W94 38 3 23. 46 1.51 . 04 . 08 POUND-INCHES

MAXIMUM W9 1-W92 38 3 2.6577 . 1773 .00 87 .0142 NEWTON-METERS

TORQUE W93-W94 38 3 2. 6503 . 1710 .0054 .0092 NEWTON- METERS

PROPERTY MATERIAL

REPL

CRP REPLASTM

PRECISION OF

GR. MEAN

METHODS ABSOLUTE

REPEAT REP ROD UNITS PERCENT REPEAT REPROD

SCORCH W9 1-W92 3 3 4.633 o 213 .739 MINUTE 4.6 16.0 TIME W93-W94 3 3 4.642 . 139 .792 MINUTE 3.0 17. 1

CURE TIME W91-W92 3 3 6.73 o 20 • 89 MINUTE 3.0 13. 2

( 50% MH

)

W93-W94 3 3 6.68 o 17 • 85 MINUTE 2.6 12. 8

CURE TIME W91-W92 3 3 10.32 o 30 1.48 MINUTE 2.9 14.3 (90% MH

)

W93-W94 3 3 l 0.26 o 24 lo 53 MINUTE 2.3 14.9

MINIMUM W91-W92 3 3 5.07 e 2

1

1.28 LB-IN. 4.2 25.2 TORQUE W93-W94 3 3 5.0 1 • 19 lo 16 Lb-IN© 3. 8 23. 1 MINIMUM W91-W92 3 3 . 5726 . 0238 • 1443 N-M 4.2 2 5.2 TORQUE W93-W94 3 3 . 5664 . 0213 . 1308 N-M 3. 8 23. 1

MAXIMUM W9 1-W92 3 3 23.52 .35 4. 35 LB-IN. 1.5 16.5 TORQUE W93-W94 3 3 23.46 • 23 4. 19 LB-IN. 1.0 17.9 MAXIMUM W9 1-W92 3 3 2.6577 . 0393 .4911 N-M 1.5 18* 5 TORQUE W93-W94 3 3 2.6503 o 02 54 . 4736 N-M 1.0 17.9

21
INTEBLAB6BAT6RY PROGRAM ON EVALUATION OF RUBBER

REPORT 39-5 SCORCH TIME - MINUTES MARCH 1979 MATERIAL W91-W92 MATERIAL W93-W94 COMMERCIAL TIRE TREAD COMMERCIAL TIRE TREAD

LAB MEAN % REL MEAN • REL VAR C6DE F MINUTE DEV SDR MINUTE DEV SDR CODE INSTRUMENT. UNIT, OR OTHER VARIATION

VO 061 4, 000 -13.7 1.93 4*000 -13.8 1.75 01

VO 064 4# 725 2.0 .76 4.77C 2.8 .67 *70 DATA RECEIVED LATE

VO 07

1

4.615 -.4 1.83 4*625 -.4 .90 Cl V0074 X 3.750 -19.1 1.94 3.975 -14.4 1.60 01

VO 077 4. 500 -2.9 8.28X 4*400 -5.2 2. 52X Cl

VO 078 4.250 -e.3 .00 4*225 -9.0 .00 01 V0079 4. 512 -2.6 .75 4*500 -3.1 .00 01

VO 0 83 4.750 2.5 1. 13 4*800 3.4 1. 15 01 VO 085 4.650 .4 .00 4.550 -2.0 , 00 01

VO 0 86 4. 800 3.6 .38 4*800 3.4 .00 01 V0090 4.750 2.5 1.84 4*925 6.1 .58 0 1 V0092 4.300 -7.2 .76 4*300 -7.4 1. 05 01 VO 095 4. 550 -1.8 1.02 4.650 .2 . 58 0 1 V01 00 X 4.600 3.6 1.64 4*400 -5.2 3. 23X 01 V01 17 4.800 3.6 1.37 4.850 4.5 1. 15 01

VO 120 4.750 2.5 1.50 4.870 4.9 .93 01 V01 28 4. 800 3.6 .00 4* 600 3.4 .00 01

V01 44 4.710 1.7 .19 4*565 -1.7 .40 01 V01 46 * 5.250 13.3 i.ee 5.200 12.0 3. 15X 01

VO 149 4.750 2.5 .38 4*775 2.9 .58 01

VO 150 X 5. 850 26.3 1.77 5.800 24.9 2. 5 1 X 0 1 V01 52 4.800 3.6 .38 4*850 4.5 1. 15 01

V01 54 X 7.660 65.3 .46 7. 49 0 61.3 .81 01

V01 56 4. 850 4.7 .84 4. 875 5.0 1. 00 01 V01 58 4. 625 -.2 .94 4*500 -3.1 .29 01

VO 161 4.500 -2.9 .75 4*500 -3. 1 .58 01 VO 166 4. 850 4.7 .75 4*850 4.5 2. 57X 0 1 VOl 69 4.300 -7.2 1.13 4.350 -6.3 .58 01 VO 1 7 1 X 1.950 -57.9 .38 1.950 -58.0 .79 0 1 VOl 82 4.200 -9.4 1.62 4*150 -10.6 .79 Cl

VO 190 4. 125 -11.0 1.00 4.075 -12.2 .50 01 V0207 4.600 -.7 1.37 4*550 -2.0 1. 57 01 V0208 4. 450 -4.0 1.00 4* 505 -3.0 1.61 01

VO 211 4.600 -.7 .38 4.700 1.2 1. IS 01 V0213 4.750 2.5 .00 4*750 2.3 .00 01

V02 14 5.200 12.2 .CO 5*250 13. 1 2. 10 01

VO 2 1

7

4.700 1.4 .00 4,750 2.3 .00 01 V0218 4.700 1.4 .75 4.700 1.2 1. IS Cl V0221 4.500 -2.9 .38 4*500 -3.1 2. 30X 01 V0238 4.935 6.5 1.43 4.935 6.3 1.90 01

VO 243 4.750 2.5 .38 4*650 4.5 .58 01 4.633 • GR. MEAN - 4*64 2 3 TEST DETERMINATIONS

. 267 • SD MEANS • *266 35 LABORATORIES IN GRAND MEANS

.077 • AVER SDR * *050 41 LABORATORIES REPORTING

MI MOTE - UNIT MINUTE

22
8

6

4

2

0

8

6

4

-

2

-

0

-

8

-

6

- 3

SC0RCH TIME

MATERIAL W91-N92 4.633 MINUTE MATERIAL W93-W94 4.642 MINUTE

MATERIAL H91-W92

23
I NT ERL ABO RATO RY PROGRAM ON EVALUATION OF RUBBER REPORT 39-5 CURE TIME (50* MH ) - MINUTES MARCH 1979 MATERIAL B91-W92 MATERIAL R93-W94 COMMERCIAL TIRE TREAD COMMERCIAL TIRE TREAD

LAB MEAN * REL MEAN « REL VAR CODE F MINUTE DEV SDR MINUTE DEV SDR CODE INSTRUMENT. UNIT, OR OTHER VARIATION

VO 06 1 6«00 -10.9 2.27 5* 93 -1 1.2 1.45 01 V0064 7.18 6.7 .52 7.18 7.5 1.06 70 DATA RECEIVED LATE

VO 071 6.75 .2 1.00 6.72 .6 .65 01

VO 074 X 5.44 -19.2 1.80 5.71 -14.5 3.73X 01

VO 077 6.40 -4.9 5.97X 6.35 -5.0 .92 01 V0078 6.12 -9.0 .40 6. 17 -7.6 .00 01 V0C79 6.62 -1.6 .50 6.62 -.9 .00 0 1 VO 083 7.05 4.7 1.39 7.00 4.7 2.02 01 V0085 6.87 2.1 .00 6.6 0 *1.3 2. 77X 0 1 V0086 7.15 e.2 .80 7.10 6.2 0 o o 01 V0C90 6.91 2.7 1.77 7.01 4.9 .63 01 V0092 6.22 -7.5 .62 6.25 -6.5 .40 01 V0095 7.10 5.4 1.20 7.00 4.7 1.67 01 V01 00 6.70 -.5 1.09 6.75 1.0 1.60 01 VOl 17 6. 80 1.0 .00 6.75 1.0 1. 26 01

VO 120 X 6.76 .7 2.21 7.07 5. 8 .68 01 VOl 28 6. 85 1.7 .00 6. 80 1.7 .46 0 1 VO 144 6.81 1.2 .32 6.65 -.5 . 38 01 VO 146 7.35 9.2 1.46 7. 1 0 6.2 2.99X 0 1 VO 149 6.82 1.4 .75 6.77 1.4 • e4 01

VO 1 50 X 8.05 19.6 .80 8.00 19.7 1.26 01 VO 152 7.00 4.0 .40 7.00 4.7 .92 01

VO 154 X 1 1. 43 69. e .49 11.10 66. 1 .82 0 1 VOl 56 6.95 3.2 1.04 6.97 4.3 .69 01

VO 1 58 6.52 -3.1 1.12 6. 35 -5.0 .69 0 1

VO 161 6.30 -6.4 .80 6.30 -5.8 1.26 01 VO 166 7.00 4.0 .80 7.05 5.5 .92 0 1 VO 169 6.40 -4.9 .80 6.40 -4.3 . 00 01

VO 1 7

1

X 2.67 -60.3 .55 2.70 -59.6 .84 01

VO 182 6.20 -7.9 2.31 6.10 -8.7 .63 01

VO 190 6.55 -2.7 .93 6.51 -2.5 .40 0 1 V0207 6.60 -2.0 .40 6.45 -3.5 2. IS 01 V0208 6.66 -1.0 .78 6.76 1.2 .51 0 1 VO 2 1 1 6. 85 1.7 .80 6. 80 1.7 .46 01 V02 13 7.10 5.4 1.72 7.00 4.7 .92 0 1 V02 14 7. 10 5.4 2.77X 6.90 3.2 3. 24X 01 VO 2 17 6.75 .2 .oo 6. 7 0 .2 . 00 01 V02 18 6.75 .2 1.09 6.75 1.0 .00 01 V0221 6.50 -3.5 .80 6.5 0 -2.8 1.39 01 V0238 7.12 5.7 .87 7.00 4.7 1. 85 01 V0243 6.75 .2 .80 6. 60 1.7 .92 01 6.73 - OR. MEAN • 6.66 3 TEST DETERMINATIONS

• 32 - SD MEANS •

• 31 35 LABORATORIES IN GRAND MEANS

• 07 - AVER SDR -

. 06 41 LABORATORIES REPORTING

MINUTE • UNIT MINUTE

24
MATERIAL

W93-W94

CURE TIME (507. MH ) MATERIAL W91-W92 6.73 MINUTE MATERIAL W93-W94 6-68 MINUTE

25
REPORT 39-5

INTERLABORATORY PROGRAM ON EVALUATION OF RUBBER CURE TIME (90* MB) - MINUTES MARCH 1979 MATERIAL W91-R92 MATERIAL COMMERCIAL TIRE TREAD COMMERCIAL TI LAB MEAN * REL MEAN * CODE F MINUTE DEV SDR MINUTE DEV

V0061 9.31 -9. 8 2.56X 9« 06 -11,7

V0064 9.50 -7.9 .32 9« 50 -7,4

V0071 10.44 1.2 .40 10.43 1.7

VO 074 X 8.43 -18.2 1.86 8.94 -12.9

VO 077 10.20 -1.1 6. 13X 9.90 -3.5 V0078 9. SO -7.9 .94 9.60 -6.5 V0079 10.31 -.0 .00 10.31 .5

VO 0 83 11.00 6.6 1.44 10.85 5.7

VO 085 10.12 -1.9 .00 10.00 -2.6

VO 0 86 o •

CD o 4.7 .27 10. 60 5.2

VO 0 90 10« 66 5.3 .90 10.96 6.8

V0092 9.50 -7.9 .73 9.4 5 -7.9

V0095 « 10.25 -.7 .81 1 0.85 5.7

V01 00 9.80 -5.0 1.18 9. 8 0 -4.5

V01 17 10.60 2.7 1.00 10.30 .4

VO 120 X 10.65 3.2 2.49X 1 2. 18 18.7

V01 28 10.40 .8 .00 l 0.40 1.3

VO 144 10.12 -1.9 .89 9.79 -4.6

VOl 46 10.85 5.2 1.74 1 0.70 4.2

V01 49 10.35 .3 1.69 1 0.37 1.1

VO 150 X 13.30 28.9 1.34 12.90 25.7

VOl 52 10.70 3.7 .00 10.70 4.2

VO 154 X 18.06 75.0 .25 17.49 70.4

VOl 56 10.62 3.0 2.07 10.67 4.0

VOl 58 9.90 -4.0 .32 9.67 -5.7

VO 161 9.95 -3.6 .73 9.65 -4.0

VO 166 10.50 i.a 1.00 10.45 1.8

VO 169 9.80 -5.0 1.47 9.9 0 -3.5

VO 1 7

1

X 3.97 -61.5 .50 3.95 -61.5

VO 1 82 9.47 -8.2 .94 9.32 -9. 1

VO 190 10.52 2.0 .94 10.52 2.5

V02 07 1 0.05 -2.6 .73 1 0. 15 -1.1

V02 08 10.02 -2.8 3.69X 1 0.4 0 1.3

V021 1 1 0.60 2.7 .73 1 0.65 3.8 V0213 * 11.00 6.6 2. 13 1 0.35 .8 V0214 « 1 1.95 15. 8 .54 1 1.90 15.9 V0217 9.95 -3.6 .00 10.00 -2.6

VO 2 1 0 10.50 1.8 .27 10.40 1.3 V0221 1 0.00 -3. 1 1.61 9.70 -5.5 V0238 10.87 5.4 4. 1 6X 10.75 4.7 V0243 10.25 -.7 .54 10. 25 -. 1

10.32 - GR . MEAN • 10.26

.53 - SD MEANS - .55

• 11 - AVER SDR -

• 09 MINUTE - UNIT MINUTE

R93-W94

RE TREAD

REL VAR SDR CODE INSTRUMENT, UNIT, OR OTHER VARIATION

1.94 01 1.12 *70 DATA RECEIVED LATE

.96 01 1.61 01 1.00 01

1.60 01 .00 01 1.53 01 2.00 01 .00 01 1.30 01 .83 0 1 1.00 01

1 . 76 01 l.SS 01 3.15X 01 .33 01 .30 01 2.40X 01 .45 01 1.15 01 .33 01 .37 01 .95 01 1.00 01 .67 01 1.00 01 1.45 01 .57 0 1 .33 01

.17 0 1 1.33 01 3.69X 01 .67 01 .67 0 1 .67 0

1

.00 0 1 .33 01 1.21 01 1.44 01

1.15 01

3 TEST DETERMINATIONS

35 LABORATORIES IN GRAND MEANS

41 LABORATORIES REPORTING

26
5

0

5

0

5

0

5

0

5

0

8

CURE TIME ( 90X MH )

MATER I AL W91-W92 10.32 MINUTE MATERIAL W93-W94

J l l L 10.26 MINUTE

I I

8.5 9.0 9.5 10.0 10.5 11.0 11.5 12.0 12-5

MATERIAL N91-N92

27
REPORT 39-5

INTERLABORATeRY PROGRAM ON EVALUATION OF RUBBER MINIMUM TORQUE - POUND-INCHES MARCH 1979 MATERIAL W91-W92 COMMERCIAL TIRE TREAD MATERIAL W93-W94 COMMERCIAL TIRE TREAD

LAB MEAN MEAN * REL MEAN MEAN « REL VAR CODE F LB-IN. N-M DEV SDR LB- IN. N-M DEV SDR C0DE

VO 06

1

5.45 .6158 7.6 .38 5.40 .6101 7.7 .42 0 1 V0064 5. 52 . 6243 9. 0 • 52 5.50 .6214 S.7 .42 70

V0071 * 5.90 . 6666 16.4 3.34X 5.35 .6045 6.7 1. 16 0 1 V0074 4.62 . 5226 -a. 7 1.82 4.77 . 5395 -4.8 1.82 01 VO 077 X 7.25 .8192 43. 1 3. 0 4X 6.95 .7853 38. 6 1. 16 0 1 V0078 5. 10 .5762 .6 .00 5. 15 .5819 2.7 .00 01 VO 079 5.00 .5649 -1.3 • 00 5.00 .5647 -.3 .00 0 1 VO 0 83 5.20 . 5875 2.6 1.38 5. 10 . 5762 1.7 .73 0 1 VO 0 85 4.69 . 530 0 -7.4 .00 4.74 .5350 -5.5 .00 40

VO 086 4.70 • 531 1 -7. 2 • 00 4.65 . 5254 -7.2 .42 01

VOC 90 4 o 80 .5424 -5.3 1.57 4.85 . 5480 -3.3 1.48 01 V0092 5.40 .6101 6.6 1.14 5.35 . 6045 6.7 .00 01 V0095 5.20 . 5875 2.6 .76 5.15 . 5819 2.7 .00 0 1 V01 00 » 4. 50 .5085 -1 1.2 .00 4.90 • 5537 -2.3 .00 01 V01 17 4.90 .5537 -3.3 1. 14 4.95 .5593 -1.3 .73 0 1

VO 120 4.65 .5254 -8.2 1.14 4.60 .5198 -8.2 . 85 01 VOi 28 5. 20 .5875 2.6 .00 5.0C .5649 -.3 .00 0 1 VO 144 6.85 .7740 35. 2 1.14 6.70 .7570 33.6 1. 16 01

VO 146 5.50 .6214 8.5 1.76 5.60 .6327 11.7 1.58 0 1 VO 149 5. 00 .5649 - 1.3 1.40 4.92 • 5565 -1.8 2. 38X 01

VO 15C 5.35 .6045 5.6 3.55X 5. 10 .5762 1.7 1. 85 01

VOI 52 4.80 . 5424 -5.3 .38 4. 80 .5424 -4.3 .42 01 VOi 54 X 8.35 .9435 6 4. 8 .76 8.30 .9378 65. 6 .42 0 1 VOI 56 5.00 .5649 -1.3 .76 4. 85 . 5480 -3.3 .42 0 1 VOI 58 4.99 .563 8 -1.5 .46 4.99 . 5644 -. 4 .00 C 1

VO 161 4.35 .4915 -14.2 .38 4.40 .4972 -12.2 1. 16 01

VO 166 4.70 .5311 -7.2 • 76 4.65 . 5254 -7.2 .42 01

VO 1 69 4.87 . 55C 0 -3. 9 1.80 4.65 .5250 -7.3 1.73 40

VO 1 7 1 « 4. 50 .5085 -11.2 1. 14 4.20 .4746 -16.2 .85 01

VO 1 82 5.50 .6214 8.5 1.04 5.45 .6158 8.7 2. 20X 01

VO 190 X 12.00 1.3559 99. 9 2.28X 1 1.75 1.3276 99.9 1.53 0 1 V02 07 5.25 . 593 2 3.6 .76 5. 1 0 .5762 1.7 . 85 Cl

VO 208 4.56 .5158 -9.9 1.44 4. 47 .5051 -10.8 .81 0 1 VO 2 11 5.40 .6101 6.6 .76 5.30 . 5988 S. 7 1.97X 01 V02 13 5.45 .615e 7.6 .38 5.40 • 61 01 7.7 .00 0 1 V02 14 5.25 • 593 2 3.6 1.00 5. 15 .5819 2.7 . 85 01 V02 17 4.60 • 519e -9.2 .00 4. 80 .5424 -4.3 .00 0 1 V02 18 5.00 . 5649 -1.3 .00 4.90 • 5537 -2.3 .42 0 1 V0221 5.00 .5650 - 1.3 • 34 5. 04 • 5700 .6 1.72 40 V0238 5.00 .564 9 - 1.3 • 95 5.00 .5649 -.3 .55 01 V0243 5. 25 • 593 2 3.6 1.04 5. 05 . 5706 .7 1.58 01 5.07 • 5726 - GR. MEAN - 5.0 1 • 5664

. 46 .0521 - SD MEANS -

• 42 • 0472 3’

o 08 .0086 • AVER SDR -

• 07 . 0077 4 LB-IN. N-M - UNIT LB- IN. N-M

INSTRUMENT. UNIT, OR OTHER VARIATION

DATA RECEIVED LATE

ORIGINAL IN NEWTON-METER

ORIGINAL IN NEWTON-METER

ORIGINAL IN NEWTON-METER

3 TEST DETERMINATIONS

28
0

5

0

5

0

5

0

5

0

3

MINIMUM TORQUE

MATERIAL W91-W92

1 L 5.07 LB-IN. MATERIAL W93-W94

1 L_ I

5.01 LB-IN.

J I

0

MATERIAL W91-H92

29
INTERLABORATORY PROGRAM ON EVALUATION OF RUBBER

REPORT 39 — 5 MAXIMUM TORQUE - POUND-INCHES MARCH 1979 MATERIAL W91-W92 MATERIAL W93-W94 COMMERCIAL TIRE TREAD COMMERCIAL TIRE TREAD

IAB MEAN MEAN * REL MEAN MEAN * REL VAR C6DE F LB-IN. N-M DEV SDR LB- IN. N-M DEV SDR CODE INSTRUMENT, UNIT, OR OTHER VARIATION

VO 061 25.10 2.8360 6.7 1.51 25. 10 2. 8360 7.0 .00 01 V0064 23. 55 2.6609 .1 .53 23.50 2.6553 .2 .53 70 DATA RECEIVED LATE

V007 i * 24.05 2.7174 a .

2

4.72X 23. 25 2.6270 -.9 1.98 01 VO 074 23.4 0 2. 6440 -.5 .35 23.55 2. 6609 .4 1.42 01

VO 077 25.75 2.9095 9.5 1.06 25. 25 2. 8530 7.6 1.07 01 V0078 25. 10 2. 8360 6.7 • 92 25. 10 2.8360 7.0 .71 01

VO 079 23.70 2.6779 .8 • 92 23.67 2.6750 .9 .00 0 1 VO 0 83 24.20 2.7344 2.9 1 • 8 4 23.95 2.706 1 2. 1 2.01 01 V0085 20.75 2.3451 -1 lo 8 • 61 20.98 2.3701 -10.6 .00 40 ORIGINAL IN NEWTON-METER

VO 0 86 22. 85 2. 581

8

-2.9 • 69 22.70 2.5649 -3.2 .71 01 V0090 24. 25 2.74C 0 3. 1 1.15 24.02 2.7146 2.4 .49 01 VC092 25.35 2. 8643 7.8 1.3 2 25. 10 2. 8360 7.0 .94 01 V0095 23. 25 2.6270 - 1.2 . 46 23.45 2.6496 -.0 .71 0 1 VOl 00 22.30 2.5197 -5.2 .00 22.50 2.5423 -4. 1 .00 01 VOl 17 22.00 2. 485e -6.5 .63 22.10 2.4971 -5.8 .36 Cl

VO l 20 22. 80 2.5762 -3. I .69 22.90 2.5875 -2.4 .97 01

VO 1 28 23. 75 2.6e3S 1.0 1.44 23.5C 2.6553 .2 .71 01

VO 144 24.95 2.8191 6. 1 .46 24.80 2. 8022 5.7 .71 01

VO 146 23.50 2.6553 -. 1 2.9 OX 23.45 2.6496 -.0 1.64 01

VO 149 22.25 2. 5 140 -5.4 .58 22. 12 2. 4999 -5.7 1.24 01

VO 1 50 23. 50 2.6553 -. 1 .00 23.25 2.6270 -.9 1.78 0 1 VO l 52 23.00 2.5988 -2.2 • CO 23.00 2.5988 -1.9 .36 01

VO 154 * 27.05 3. 1468 18.4 • 69 27.80 3. 141 1 18.5 .97 01

VOl 56 23. 20 2.6214 -1.4 1.91 22.75 2.5705 -3.0 .71 01

VO 1 58 24.00 2.71 1

8

2.0 1.38 23.90 2.7005 1.9 .67 C l

VO 161 21. 10 2.3641 -10. 3 i.Cl 21.30 2.4067 -9.2 1.07 01 VO 166 22. 35 2.5253 -5. 0 1.29 22. 10 2.4971 -5. 8 .00 01

VO 169 22.57 2. 550 1 -4.0 2.47X 22.44 2. 5351 -4.3 .9* 4C ORIGINAL IN newton-mbter

VOl 71 » 19.00 2. 1468 -19.2 • 23 19. 10 2. 1581 -18.6 .71 0 1 VO 1 82 24.65 2.7852 4. 8 1.90 25.00 2.8248 6.6 1.33 0 1

VO 1 90 X 48. 25 5. 451 a 99. 9 .63 48.30 5.4574 99.9 .62 0 1 V0207 23.6 5 2. 6722 .5 1.0 1 23.70 2.6779 1. 0 1.29 01 V0208 24.30 2.7462 3.3 .83 24.67 2.7880 5.2 4. 0 1 X 01 V02 1 1 24. 85 2. 8078 5.6 1.63 24.65 2.7052 5. 1 .62 01 V0213 25.00 2. e248 6.3 • 46 24. 80 2. 0022 5.7 3. 10X 01

V02 14 24.65 2. 7e52 4. 8 1.03 24.50 2.7663 4.5 . 36 0 1 V0217 21.85 2 . 468e -7. 1 .00 22. 10 2.4971 -5. 8 .00 0 1 V02 10 X 10.45 1. 1 807 -55.6 • 23 1 0.35 1. 1694 -55.9 .36 0 1 V0221 23.28 2.6301 -1.0 1 .44 23.37 2. 6401 *• ^ 4.40X 40 ORIGINAL IN NEWTON-METER

V0238 22.00 2. 4858 -6.5 .58 21.75 2.4575 -7.3 3. 55X 01 VC243 23.70 2.6779 .8 1.0 1 23.65 2.6722 .8 1.55 01

23. 52 2.6577 - GR. MEAN - 23.46 2. 6503 3 TEST DETERMINATIONS

1. 57 . 1773 • SD MEANS • 1.51 .1710 38 LABORATORIES IN GRAND MEANS

• 13 . 0142 - AVER SDR -

. 08 . C092 41 LABORATORIES REPORTING

LB-IN. N-M • ON I

T

LB-IN. N-M

30
MATERIAL

W93-W94

MAXIMUM T0RQUE

MATER I AL W91-W92 23.52 LB-IN. MATERIAL W93-W94 23-46 LB-IN.

31
NBS-114A (REV. 9-781

U.S. DEPT. OF COMM. BIBLIOGRAPHIC DATA

SHEET

1. PUBLICATION OR REPORT NO. RUBBER CRP39

1 No. 3. Recipient's Accession No.

4. TITLE AND SUBTITLE

INTERLABORATORY PROGRAMS FOR RUBBER

Analyses No. 39

January - March 1979

5. Publication Date June 27, 1979

7. AUTHOR(S)

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

8. Performing Organ. Report No. NBSIR 79- 1377

9. PERFORMING ORGANIZATION NAME AND ADDRESS

NATIONAL BUREAU OF STANDARDS

DEPARTMENT OF COMMERCE

WASHINGTON, DC 20234

11. Contract/Grant No.

12. SPONSORING ORGANIZATION NAME AND COMPLETE ADDRESS (Street, City, Stste, ZIP)

Collaborative Testing Services, Inc., 9241 Wood Glade Drive,

Great Falls, VA 22066

13. Type of Report & Period Covered FINAL

15. SUPPLEMENTARY NOTES

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

16. ABSTRACT (A 200-word or leas factual summary of moat si ghi ficant 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 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

36

22. Price

U S COMM- D

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