Combined environment aging effects: radiation-thermal degradation of polyvinylchloride and polyethylene. [Gamma radiation]
Results are presented for a case of polymer aging in which powerful synergisms are found between radiation and temperature. This effect was observed with formulations of polyvinylchloride and polyethylene and occurred in simultaneous and sequential radiation-thermal experiments. Dose rate dependencies, which appear to be mechanistically related to the synergism, were also found. The evidence indicates that these aging effects are mediated by a thermally induced breakdown of peroxides initially formed by the radiation. Similar effects could be important to material degradation in a variety of other types of combined-stress environment. A new technique, which uses PH/sub 3/ treatment of intact polymer specimens to test for the importance of peroxides in the pathway that leads to changes in macroscopic tensile properties, is described.
- Research Organization:
- Sandia National Labs., Albuquerque, NM
- OSTI ID:
- 6469463
- Journal Information:
- J. Polym. Sci., Polym. Chem. Ed.; (United States), Vol. 19:8
- Country of Publication:
- United States
- Language:
- English
Similar Records
Accelerated aging in combined stress environments. [Synergistic effects of thermal and radiation environments on Bacillus subtilis]
Monitoring Degradation of Nuclear Cable Insulation Subjected To Sequential and Simultaneous Thermal and Radiation Aging
Related Subjects
POLYETHYLENES
AGING
CHEMICAL RADIATION EFFECTS
THERMAL DEGRADATION
PVC
ABSORPTION SPECTROSCOPY
GAMMA RADIATION
INFRARED SPECTRA
MEDIUM TEMPERATURE
PEROXIDES
PHOSPHINES
SYNERGISM
CHEMISTRY
CHLORINATED ALIPHATIC HYDROCARBONS
ELECTROMAGNETIC RADIATION
HALOGENATED ALIPHATIC HYDROCARBONS
IONIZING RADIATIONS
ORGANIC CHLORINE COMPOUNDS
ORGANIC COMPOUNDS
ORGANIC HALOGEN COMPOUNDS
ORGANIC POLYMERS
OXYGEN COMPOUNDS
PHOSPHORUS COMPOUNDS
POLYMERS
POLYOLEFINS
POLYVINYLS
RADIATION CHEMISTRY
RADIATION EFFECTS
RADIATIONS
SPECTRA
SPECTROSCOPY
360406* - Materials- Polymers & Plastics- Radiation Effects- (-1987)
360405 - Materials- Polymers & Plastics- Degradation & Erosion- (-1987)