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采用ＬｉＯＨ作催化剂，ＤＭＦ为促进剂，利用八甲基环四硅氧烷（Ｄ４）、八苯基环四硅氧烷（Ｐ４）为单体，制备聚二甲基－二苯基硅氧烷二醇．在一定条件下，其分子量可由加水或ＬｉＯＨ的量控制．未反应的Ｐ４可由石油醚－甲醇处理除去．
Using LiOH as a catalyst and DMF as a promoter, polydimethyl-diphenylsiloxane was prepared using octamethylcyclotetrasiloxane (D4) and octaphenylcyclotetrasiloxane (P4) as monomers Diol. Under certain conditions, its molecular weight can be controlled by adding water or LiOH. Unreacted P4 can be removed by petroleum ether-methanol treatment.