The anionic polymerization of unsaturated monomers with functionalized initiators having the structure R.sup.1 R.sup.2 R.sup.3 Si--O--A'--Li is improved when each R is methyl and A' is --CH.sub.2 --C.sub.6 H.sub.10 --CH.sub.2 -- or --CH.sub.2 --CR'R"--CH.sub.2 -- wherein R' is a linear alkyl having from 1 to 10 carbon atoms and R" is hydrogen or a linear alkyl having from 1 to 10 carbon atoms. This initiator provides process and product advantages over all other known initiators of the same type.
当使用具有结构R.sup.1 R.sup.2 R.sup.3 Si--O--A'--Li的官能化
引发剂进行不饱和单体的阴离子聚合时,如果每个R都是甲基,A'是--CH.sub.2 --C.sub.6 H.sub.10 --CH.sub.2 --或--CH.sub.2 --CR'R"--CH.sub.2 --,其中R'是具有1至10个碳原子的线性烷基,R"是氢或具有1至10个碳原子的线性烷基,则可以改善此聚合反应。与所有其他已知的相同类型的
引发剂相比,此
引发剂提供了更好的工艺和产品优势。