ABSTRACT:Benzyl phenyl selenidcs were used as photoiniferters for polymerizations of p-bromostyrene, p-chloromethylstyrene, p-methylstyrene, and p-vinylbenzyl acetate. In the limited range of conversion polymer yields and number-average molecular weights increased with polymerization time. Polymers from p-methoxybenzyl p-trimethylsilylphenyl selenide contained the benzyl and arylseleno groups at rx-and w-chain ends, respectively. Photoirradiation of polystyrene containing a phenylseleno group at the w-chain end as polymeric photoiniferter afforded effectively block copolymers of styrene and p-substituted styrenes.
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