以四烯丙基(二甲基)硅烷为核的超支化聚硅碳烷的合成与表征

Synthesis and Characterization of Hyperbranched Poly(Carbosilanes) Containing a Core Molecule of 1,2-Bis(Diallyl(Methyl)Silyl)Ethan

以四烯丙基(二甲基)硅烷(B4)为核、甲基氢二烯丙基硅烷(AB2)为单体,通过硅氢加成反应,采用无核一步法、核一步法、核多步法合成了超支化聚有机硅碳烷。用FT-IR1、H-NMR、MALLS-GPC对该聚合物的结构进行了表征。研究了核多步法对超支化聚合物分子量及其分布的控制,结果表明,用核多步法合成超支化聚有机硅碳烷可有效地控制产物的分子量及其分布。

The synthesis of hyperbranched poly （carbosilanes） based upon 1,2-bis （ diallyl （methyl） silyl）ethane （134） as a core molecule and diallyl （methyl）silane （AB2） monomer via hydrosilylation addition have been investigatedl And the hyperbranched poly（carbosilanes） were prepared using one- step without core, one-step with core and pseudo-one-step methods. FT-IR, ^1H-NMR, MALLS-GPC were employed to identify the structure of the polymers. Furthermore, the controll of the molecular weight and its polydispersity index via pseudo-one-step was researched. The analysis reveals that the molecular weight and polydispersity index are controlled effectively when using pseudo-one-step prepare the hyperbranched poly（carbosilanes）.