CROSSLINKING AND DEGRADATION IN $gamma$-IRRADIATED POLY-n-ALKYL ACRYLATES
Polymers of methyl, ethyl, n-butyl, n-octyl, and n-cetyl acrylate were gamma -irradiated in vacuo, and the effects of irradiation temperature (-- 196 to 56 deg C) on energy yields for crosslinking and degradation estimated from gel fractions and swelling behavior of the gel. The extent of degradation was independent of polymer structure and reaction temperature, suggesting a molecular chain breaking process. Crosslinking, found to occur predominantly on the alkyl side chain, was independent of temperature above and below the polymer softening point, but was several fold higher for irradiations above the softening point; these data seemed to reflect the importance of segmental mobility of radiation produced polymer radicals in the crosslinking step. (auth)
- Research Organization:
- Ford Motor Co., Dearborn, Mich.
- NSA Number:
- NSA-18-012201
- OSTI ID:
- 4118080
- Journal Information:
- J. Polymer Sci., Pt. A, Journal Name: J. Polymer Sci., Pt. A Vol. Vol: 2
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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Related Subjects
ALKYL RADICALS
BUTYL RADICALS
CHEMICAL REACTIONS
CHEMISTRY
COLLOIDS
CONFIGURATION
DECOMPOSITION
DIAGRAMS
DIFFUSION
EFFICIENCY
ENERGY
ETHYL RADICALS
EXPANSION
FREE RADICALS
GAMMA RADIATION
IRRADIATION
LOW TEMPERATURE
MEASURED VALUES
MELTING POINTS
METHYL RADICALS
MOLECULES
OCTANE
POLYESTERS
POLYMERS
RADIATION CHEMISTRY
RADIOLYSIS
TEMPERATURE
VACUUM
VARIATIONS