Date of Award

Summer 8-1988

Document Type


Degree Name

Master of Science (MS)



Committee Director

Wynford L. Harries

Committee Member

G. S. Khandelwal

Committee Member

Gilbert R. Hoy

Committee Member

James L. Cox, Jr.

Call Number for Print

Special Collections LD4331.P48B72


Commercial films of polyetherimide (PEI), polyetheretherimide (PEEI), polyethylene terephthalate (PET), and polycarbonate (PC) were exposed in vacuum to l 00-keV electron radiation to total absorbed doses of l, l 0, l 00, 300, and 500 kilograys. The concentration of radiation-generated radicals, as measured by electron paramagnetic resonance (EPR), increased by over an order of magnitude in all four polymers. Correspondingly, the intensity of the infrared absorption peaks increased uniformly for all doses. Solubility tests resulted in decreased solubility in all polymers. IR, EPR, and solubility suggest dehydrogenation of the aliphatic C-H and phenyl C-H sites. The data indicated that cross linking is occurring in all polymers tested.


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