Synthesis of an Aprotic Polar Polymer with Tetrahydrofuran Moiety: Copolymer Composition Control in Radical Copolymerization with Styrene Using Suspension System

摘要

A method to control. the copolymer composition in suspension polymeriza- tions of monomers with different polarity was studied: the copolymerization of a styrene-type ~onomer having THF moiety (I) with styrene (feed ratio 1: 1) was carried out at 85degC using benzoyl. peroxide (BPO) in a suspension system consisting of water and inonochlorobenzene. The copolymerization was greatly affected by a mixture ratio of suspension system, and when the H_2O : PhCl. ratio was 7 : 1 (v/v), 1 and St were consumed almost atthe same rate, which suggested the formation of a random copol- ymer with uniform composition. The copolymer was proven to have an identical struc- ture as expected, and a composition ratio of 1: 1 by lH NMR analysis and elemental analysis.