Importance of Temperature and Humidity Control in Rubber Testing: I—Stress-Strain and Tensile Properties

doi:10.1021/ie50227a041

Importance of Temperature and Humidity Control in Rubber Testing: I—Stress-Strain and Tensile Properties

Industrial & Engineering Chemistry ◽

10.1021/ie50227a041 ◽

1928 ◽

Vol 20 (11) ◽

pp. 1245-1273

Keyword(s):

Tensile Properties ◽

Stress Strain ◽

Humidity Control ◽

Temperature And Humidity

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Importance of Temperature and Humidity Control in Rubber Testing. II—Resistance to Abrasion

Rubber Chemistry and Technology ◽

10.5254/1.3535412 ◽

1929 ◽

Vol 2 (4) ◽

pp. 680-697

Author(s):

W. A. Gibbons ◽

J. M. Bierer ◽

E. R. Bridgewater ◽

D. F. Cranor ◽

C. R. Park ◽

...

Keyword(s):

Relative Humidity ◽

Experimental Error ◽

Negligible Effect ◽

Stress Strain ◽

Humidity Control ◽

Temperature Changes ◽

Constant Relative Humidity ◽

Temperature And Humidity ◽

Cent Relative Humidity ◽

Great Error

Abstract This study shows that in determining resistance to abrasion the temperature of the room or cabinet should be controlled within ± 1 ° C. in order to avoid significant errors in the results from this source. Below are shown the percentage differences per degree Centigrade obtained with each of the stocks. It must be remembered that this probably holds only over the range of temperatures studied and might change rapidly outside of this range. As the temperature changes from 15 ° C. to 35 ° C., the resistance to abrasion changes per degree Centigrade in the following manner: In the light of the present investigation there will be no great error in results caused by differences in relative humidity either with the raw or vulcanized stock. Where laboratories are equipped to condition raw and vulcanized stock for stress-strain tests, it appears that it would be advisable also to condition samples for determining resistance to abrasion. It would at least tend to produce more nearly uniform results by eliminating possible sources of small errors. As the relative humidity during exposure of raw stock increases from 10 per cent to 100 per cent, the resistance to abrasion per 1 per cent relative humidity changes roughly in the following manner: As these variations are small compared with the experimental error, it is evident that if the relative humidity does not vary over too wide a range its effect may be neglected. The temperature of storing the cured samples while maintaining a constant relative humidity has a negligible effect as in the case of relative humidity. As the temperature increases the resistance to abrasion per degree changes in the following manner:

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