Korea Polymer Journal, Vol.2, No.1, 61-65, April, 1994
Photo-induced Cationic Ring-Opening Polymerization of 2-Alkenyl-4-methylene-1,3-dioxolanes by Benzylsulfonium Salt
Preparation of 4-methylene-1,3-dioxolane derivative (Ia, Ib) with benzyl-4-hydroxy-phenyl methylsulfonium hexafluoro-antimonate (BSS_ is described. Unsaturated cyclic acetals Ia, Ib were synthesized by dehydrochlorinatio of 4-chloromethyl-1,3-dioxolane derivatives, which were easily prepared from acrolein derivative and 3-chloro-1,2-propane diol with sodium methoxide at ambient temperature. The photo-induced cationic polymerization with BSS yielded soluble poly-(keto-ether)s containing carbon-carbon double bond, wheres the cationic polymerization of Ia, Ib with CH3SO3H at ambient temperature produced crosslinked polymers.
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