Synthesis, Characterization, and Functions of Novel Silicon-Containing Polyacetylenes

目前的项目已经处理了新型的，高分子量聚合物的合成从含硅乙炔，聚合物的独特性质的阐明，并开发其功能。研究结果总结如下：1。3-（三甲基硅基）-1-炔聚合物的合成与表征四种3-（三甲基硅基）-1-炔的聚合[HC<同位>CCH(SiMe_3)R]R = CH_3、n-C_3H_7 n-C_5H_ < 11 >,和n-C_7H_ 15 > <)。在Mo、W和Nb催化剂的作用下，这些单体以高收率得到了新的聚合物。每种聚合物均为黄色固体，其结构可用[CH=CCH(SiMe_3)R_n]表示。R = n-C_5H_<11>的聚合物具有高达45x10^4的高分子量，可溶于甲苯和氯仿等常见有机溶剂，并通过溶液铸造形成膜。该聚合物的电导率为10^<-18> S.cm^<-1>，其未配对电子密度<1x10^<15>自旋/g。进一步研究了聚合物的透气性。研究了五种三甲基硅基乙炔同质物（HC<全等>CSiMe_2R; R = n-C_6H_<13>, CH_2CH_2Ph, CH_2Ph， Ph和t-Bu）的聚合反应。在合适的W催化剂存在下，每个单体都能生成聚合物。聚合物是黄色固体或橡胶。具有柔性基团的聚合物（R = n-C_6H_<13>, CH_2CH_2Ph, CH_2Ph）在有机溶剂中完全可溶，分子量约为1 × 10^4.3。两种新型含硅单取代乙炔[HC<全同>CCH(SiMe_<>R)-n-C_3H_7]的聚合及聚合物性能R = n-C_6H^3和Ph)在Mo、W和Nb催化剂的作用下，以良好的产率生成了分子量为1x10^5 - 4x10^5的聚合物。这两种聚合物都是黄色固体，可溶于许多溶剂。这些聚合物的热、机械、电学和磁性能已经被阐明。

The present project has dealt with the synthesis of novel, high-molecular-weight polymers form Si-containing acetylenes, elucidation of unique properties of the polymers, and exploitation of their functions. The results are summarized as follows:1. Synthesis and Characterization of Polymers from 3-(Trimethylsilyl)-1-alkyne Polymerization of four kinds of 3-(trimethylsilyl)-1-alkynes [HC<congruent>CCH(SiMe_3)R; R= CH_3, n-C_3H_7,n-C_5H_<11>, and n-C_7H_<15>) was examined. New polymers were obtained in high yields from these monomers in the pressence of Mo, W, and Nb catalysts. Every polymer was a yellow solid, whose structure could be expressed by [CH=CCH(SiMe_3)R_n]. Thepolymer with R = n-C_5H_<11> had high molecular weights up to 45x10^4, dissolved in many common organic solvents such as toluene and chloroform, and afforded a membrane by solution casting. The electrical conductivity of this polymer was 10^<-18> S.cm^<-1>, and its unpaired-electron density was <1x10^<15> spin/g. Further, the gas permeability ofthe polymer was investigated.2. Polymerization of Silylacetylenes and Polymer Properties Polymerization of five kinds of trimethylsilylacetylene homologues (HC<congruent>CSiMe_2R; R = n-C_6H_<13>, CH_2CH_2Ph, CH_2Ph, Ph, and t-Bu) was examined. Every monomer produced a polymer in the presence of suitable W catalysts. The polymers were yellow solids or rubbers. The polymers with flexible groups (R = n-C_6H_<13>, CH_2CH_2Ph, and CH_2Ph) were totally soluble in organic solvents, and their molecular weights were around 1x10^4.3. Polymerization of 3-Silyl-1-hexyne and Polymer Properties Two kinds of novel Si-containing monosubstituted acetylenes [HC<congruent>CCH(SiMe_<>R)-n-C_3H_7; R = n-C_6H^3 and Ph) produced polymers (MW 1x10^5 - 4x10^5) in good yields in the presence of Mo, W, and Nb catalysts. Both polymers were yellow solids and soluble in many solvents. Thermal, mechanical, electrical, and magnetic properties of these polymers have been elucidated.