含苯炔及苯基硅亚甲基结构的新型聚合物的合成及固化反应的研究

Research on synthesis and curing reaction of a new polymer with structure of benzyne and phenylsinylene.

以14-二乙炔基苯和苯基硅烷(PhSiH3)为原料、四氢铝锂为催化剂,在120℃下,通过14-二乙炔基苯中的炔氢和苯基硅烷中的硅氢间的脱氢反应,合成了主链带苯炔基和苯基硅亚甲基的新型聚合物;采用IR和1HNMR表征了其结构,并对其性能及固化反应机理进行了研究。结果表明,该聚合物熔点低、可溶解于常见的有机溶剂,具有良好的加工性能;固化后,通过—Si—H与—C—C—的硅氢加成反应及—C—C与Ph—C—C间的Diels-Alder反应,生成刚性的苯并结构,具有良好的耐热性能。

A new polymer with structure of 1,4-diethynylbenzene and phenylsinylene in the main chain was synthesized by taking 1,4-diacetylenebenzene and phenyl silane(PhSiH_3) as material,tetrahydralli as catalyst,by dehydrogenation between C C H in 1,4-diacetylenebenzene and Si H in phenyl silane under 120 ℃.The structure of resulting polymer was characterized by IR spectrum and 1H-NMR spectra,and made a study on its performance and curing reaction mechanism.The result showed that the synthesized polymer had a low melting point,was soluble in common organic solvents,and had good processability.The hydrosilylation reaction between Si H and C C ,as well as the Diels-Alder reaction between C C and ph C C could produce rigid benzo structure in polymer and make the polymer having high heat-resistance when being cured.