甲基氢硅氧烷/二甲基硅氧烷二元共聚物及其齐聚氧化乙烯接枝物的合成

SYNTHESIS OF DUAL COPOLYMER OF METHYLHYDROSILOXANEDIME-THYLSILOXANE AND ITS GRAFT COPOLYMER WITH OLIGOOXYETHYLENE SIDE CHAIN

本文采用质子酸催化剂合成出含Si-H键的线型聚(甲基氢硅氧烷/二甲基硅氧烷)中间体。讨论了体系中微量水、封端剂用量及产物处理方法对聚合物分子量的影响。将此中间体与α-烯丙基齐聚乙二醇甲醚反应,NMR和IR结果均表明得到了带有氧化乙烯结构侧链的硅氧烷接枝共聚物。

The ring opening copolymerization of D4 (octamethylcyelotetrasiloxane) and D4H (tetramethyleyelotetrasiloxane) was studied. The linear copolymers were obtained using toluene sulfonic acid as catalyst.The micro amounts of H_2O presented in reaction system was found to be a chief factor influencing the average molecular weight of the product. The molecular weight of polysiloxane decreased markedly on addition of hexamethyl disiloxane (HMDS). Polysiloxanes with olgooxyethylene side chain which might be used as polymer electrolyte after eomplexing with alkali metal salts were obtained through hydrosilylation of the above mentioned polysiloxane and α-allyl oligooxyethylene ether.