A test of the Arrhenius extrapolation assumption for a nitrile rubber
The Arrhenius relation predicts a linear relation between log of time to property change and inverse absolute temperature, with the Arrhenius activation energy E{sub a} given from the slope. For a nitrile rubber, Arrhenius behavior is observed for elongation vs air-oven aging temperature, with a E{sub a} of 22 kcal/mol. Confidence in extrapolation to low temperatures can be increased by measuring oxygen consumption. From 95 to 52 C, the E{sub a} for oxygen consumption is identical to that for elongation; however, below 52 C, the E{sub a} for oxygen consumption drops slightly to 18 kcal/mol, indicating that the extrapolation assumption probably overestimates the tensile property lifetime by a factor of about 2 at 23 C.
- Research Organization:
- Sandia National Labs., Albuquerque, NM (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- AC04-94AL85000
- OSTI ID:
- 10176027
- Report Number(s):
- SAND--94-2035C; CONF-9409181--2; ON: DE94017337; BR: GB0103012
- Country of Publication:
- United States
- Language:
- English
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