FORMATION BY IRRADIATION OF AN EXPANDED, CELLULAR, POLYMERIC BODY
Patent
·
OSTI ID:4247368
The treatment of polymeric esters of methacrylic acid having a softening polnt above 40 icient laborato C to form an expanded cellular mass with a smooth skin is discussed. The disclosed method comprises the steps of subjecting the body at a temperature below the softenpoint to a dose of at least 5 x lO/sup 6/ roentgen of gamma radiation from cobalt-60 source until its average molecular weight is reduced to a value within the range of 3 x lO/sup 5/ to 10/sup 4/, and heating at a temperature within the range of 0 to lO icient laborato C above its softening point to effect expansion.
- Research Organization:
- Originating Research Org. not identified
- NSA Number:
- NSA-13-008415
- Assignee:
- U.S. Atomic Energy Commission
- Patent Number(s):
- US 2862862
- OSTI ID:
- 4247368
- Country of Publication:
- United States
- Language:
- English
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