Solution Polymerization of Vinyl Acetate with Redox Initiator at Low Temperatures

I. Investigation of Redox Systems

Abstract

Solution polymerizations of vinyl acetate with various initiators were studied at low temperatures. The rate of polymerization induced by peroxide or azobis initiator which cosidered to be relatively active at low temperature was slow. On the other hand, the polymerization system was colored with redox initiator and it was remarkable as the rate of polymerization became rapid.
Some redox initiators had high initial rate of polymerization but showed the tendency of “dead end”. However, in the polymerzation reaction used t-butyl-perbenzoate-l-ascorbic acid system, the polymer was colorless and the rate of polymerization was relatively rapid, and the tendency of “dead end” was not observed at the suitable redox concentration.
This system would be one of the most effective redox initiators for the solution polymerization of vinyl acetate at low temperatures.