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Keywords Group transfer polymerization;Initiator;Benzylthio trimethyl silane;Polyacrylonitrile;Poly（meth）acrylate; 基團(tuán)轉(zhuǎn)移聚郃;新引發(fā)劑;芐硫基三甲基矽烷;聚丙烯腈;聚（甲基）丙烯酸酯;