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- W2318377440 abstract "A series of copolymers containing covalently attached benzophenone (BP) photo-cross-linkers were synthesized, and their UV-induced gelation was monitored as a function of the extent of BP conversion. For poly(methyl methacrylate) copolymers, the recombination yield between BP- and aliphatic-centered radicals was estimated and compared to that for dimerization of each species, directly confirming that the high gelation efficiencies observed for these copolymers arise due to the additional cross-linking pathways provided by covalently incorporated BP, as compared to doping with a small-molecule cross-linker. The placement of the hydrogen species most susceptible to abstraction by triplet benzophenone is found to greatly influence gelation efficiency, since radical generation on the polymer backbone typically increases the probability of dislinking events, while hydrogen abstraction pendent to the copolymer backbone tends to enhance cross-linking. Finally, the presence of atmospheric oxygen during photo-cross-linking was found to yield only modest changes in the gelation behavior of these copolymers." @default.
- W2318377440 created "2016-06-24" @default.
- W2318377440 creator A5043026175 @default.
- W2318377440 creator A5048668558 @default.
- W2318377440 creator A5061671971 @default.
- W2318377440 date "2012-06-06" @default.
- W2318377440 modified "2023-10-18" @default.
- W2318377440 title "Gelation of Copolymers with Pendent Benzophenone Photo-Cross-Linkers" @default.
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- W2318377440 doi "https://doi.org/10.1021/ma300784d" @default.
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