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Infrared spectroscopic analysis of the effects of simulated space radiation on a polyimideInfrared spectroscopic techniques have been used to study the effects of electron radiation on the polyimide PMDA-p,p-prime- ODA. The radiation exposures were made at various dose rates, for a total dose approximately equal to that for 30 years of exposure to electron radiation in geosynchronous earth orbit. At high dose rates the major effect was probably the formation of a polyisoimide or a charged quaternary amine, and at the low dose rates the effect was a reduction in the amount or aromatic ether linkage. In addition, the effects of dose rate for a small total dose were studied. Elevated temperatures occurred at high dose rates and were, in part, probably the cause of the radiation product. The data suggest that dose rates for accelerated simulations of the space environment should not exceed 100,000 rads/sec.
Document ID
Document Type
Reprint (Version printed in journal)
Ferl, J. E. (Joint Institute for Advancement of Flight Sciences Hampton, VA, United States)
Long, E. R., Jr. (NASA Langley Research Center Hampton, VA, United States)
Date Acquired
August 10, 2013
Publication Date
December 1, 1981
Subject Category
Distribution Limits