Heterochain polycarbosilanes are well-known materials possessed important properties. Some of their applications, such as gas separation membranes, require high molecular weight polymers that provide good filmforming and mechanical properties. In this research, the synthesis of poly (1,1-dimethyl-1-silapentene) via the ring-opening metathesis polymerization (ROMP) of 1,1-dimethyl-1-silacyclopentene and the acyclic dienes metathesis (ADMET) of diallyldimethylsilane mediated by Ru-carbene Grubbs complexes 1st - 3rd generations as well as Hoveyda-Grubbs 2nd generation catalyst were studied for the first time. High molecular weight poly (1,1-dimethyl-1-silapentene) was synthesized by ROMP of 1,1-dimethyl-1-silacyclopentene. Varying the type and loading catalyst, temperature and monomer concentration, we obtained poly (1,1-dimethyl-1- silapentene) with Mw = 100–143 kDa, which is significantly higher (5–7 times) than that reached previously by olefin metathesis polymerization. The ADMET polymerization of diallyldimethylsilane led to oligomers with the average polymerization degree not exceeded 4.4.

杂链聚碳硅烷是众所周知的具有重要性能的材料。它们的某些应用（例如气体分离膜）需要具有良好成膜性和机械性能的高分子量聚合物。本研究通过1,1-二甲基-1-硅环戊烯的开环复分解聚合（ROMP）和二烯丙基二甲基硅烷介导的无环二烯复分解（ADMET）合成聚（1,1-二甲基-1-硅戊烯）首次研究了Ru-carbene Grubbs的第一至第三代配合物以及Hoveyda-Grubbs的第二代催化剂。通过1，1-二甲基-1-硅环戊烯的ROMP合成高分子量的聚（1,1-二甲基-1-硅戊烯）。改变催化剂的类型和负载量，温度和单体浓度，我们获得了聚（1，Mw = 100–143 kDa的1-1-二甲基-1- 1,1硅戊烯），比以前的烯烃复分解聚合反应高得多（5–7倍）。二烯丙基二甲基硅烷的ADMET聚合产生低聚物，其平均聚合度不超过4.4。