Kinetic model for extrapolation of combined radiation-thermal accelerated aging experiments
A general theoretical model has been derived for the case of oxidative degradation dominated by the slow breakdown of hydroperoxide species. The model has been used to predict the general form of dose-rate effects for this mechanism. The model also suggests a method for creating isothermal dose-rate curves through a time-temperature dose rate superposition procedure which utilizes no adjustable parameters. The superposition procedure and the kinetic model are quantitatively verified using accelerated aging laboratory data and real-time nuclear power plant aging data on a PVC and a PE material. Although oxidative degradation is discussed in this paper, the general form of the theoretical model should allow it to be applied to oxidative crosslinking as well. 1 reference, 1 figure.
- Research Organization:
- Sandia National Labs., Albuquerque, NM (USA)
- DOE Contract Number:
- AC04-76DP00789
- OSTI ID:
- 5041700
- Report Number(s):
- SAND-84-0094C; CONF-840614-12; ON: DE84005804
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
360406* -- Materials-- Polymers & Plastics-- Radiation Effects-- (-1987)
AGING
CHEMICAL RADIATION EFFECTS
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
CHEMISTRY
CHLORINATED ALIPHATIC HYDROCARBONS
DOSE RATES
HALOGENATED ALIPHATIC HYDROCARBONS
KINETICS
MATERIALS TESTING
ORGANIC CHLORINE COMPOUNDS
ORGANIC COMPOUNDS
ORGANIC HALOGEN COMPOUNDS
ORGANIC POLYMERS
OXIDATION
POLYETHYLENES
POLYMERS
POLYOLEFINS
POLYVINYLS
PVC
RADIATION CHEMISTRY
RADIATION EFFECTS
REACTION KINETICS
TESTING