Abstract

New copolymers of norbornene and 1,5-bis(hexenyl-5)-1,1,3,3,5,5-hexamethyltrisiloxane containing flexible siloxane and rigid norbornene fragments in the main chain are synthesized. Synthesis is carried out using three types of olefin metathesis reactions: the ring-opening metathesis polymerization of norbornene, the metathesis of nonconjugated diene 1,5-bis(hexenyl-5)-1,1,3,3,5,5-hexamethyltrisiloxane, and the interchain macromolecular cross-metathesis between polynorbornene and siloxane-containing polyene. The latter reaction is studied for the first time. With its help, new statistical multiblock copolymers of norbornene and 1,5-bis(hexenyl-5)-1,1,3,3,5,5-hexamethyltrisiloxane with different average block lengths are obtained and characterized by ¹H and ¹³C NMR and IR spectroscopy. The effect of the copolymer structure on their thermal properties is investigated.

中文翻译：

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烯烃复分解反应合成新的降冰片烯-1,5-双（己烯基）六甲基三硅氧烷共聚物

摘要

合成了降冰片烯与1,5-双（己烯基-5）-1,1,3,3,5,5-六甲基三硅氧烷的新共聚物，该共聚物在主链中包含柔性硅氧烷和刚性降冰片烯片段。使用三种类型的烯烃复分解反应进行合成：降冰片烯的开环复分解聚合，非共轭二烯1,5-双（己烯基-5）-1,1,3,3,5,5-六甲基三硅氧烷的复分解反应，以及聚降冰片烯与含硅氧烷的多烯之间的链间大分子交叉复分解。首次研究了后者的反应。借助于其，获得了具有不同平均嵌段长度的降冰片烯与1,5-双（己烯基-5）-1,1,3,3,5,5-六甲基三硅氧烷的新型统计多嵌段共聚物，其特征在于¹ H和¹³13 C NMR和IR光谱。研究了共聚物结构对其热性能的影响。