THE EFFECT OF POLYMER COMPOSITION ON RADIATION-INDUCED CROSSLINKING
The gelation induced by Co/sup 60/ gamma radiation in butadiene-styrene copolymers, homopolymers, and mixtures of these homopolymers was studied by use of random crosslinking theory. The number of crosslinks formed per 100 ev of energy absorbed by the polymer, G(X), was found to be 0.045 for polystyrene and 3.6 for polybutadiene. The behavior of styrene units in copolymers and physical mixtures of butadiene and styrene homopolymers was different for the two polymer systems. Gel measurements showed that in the copolymer system there was a transfer of radiation energy from butadiene to styrene units, whereas there was no energy transfer in mill- and latex-prepared physical mixtures. It was further determined that terpolymerization of methyl methacrylate with butadiene and styrene induces some chain scission within the polymer chain when it is irradiated, thereby lowering further the net crosslinking of the resulting polymer. (auth)
- Research Organization:
- B.F. Goodrich Co. Research Center, Brecksville, Ohio
- NSA Number:
- NSA-14-008477
- OSTI ID:
- 4195508
- Journal Information:
- J. Polymer Sci., Journal Name: J. Polymer Sci. Vol. Vol: 41
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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