含□吩苯乙烯側鏈液晶高分子之合成與性質研究

Abstract

本研究之主要目的在於合成含□吩環、雙鍵連結基以及末端極性基之側鏈液晶高分子，經仔細設計高分子主鏈、柔軟間距、液晶基及極性末端基，將合成出兩系列新的側鏈液晶聚合物。所選擇之高分子主鏈聚矽氧烷主鏈，以3至11個亞甲基單位為柔軟間距，而已反式-1-苯乙烯-2-□吩為液晶基，甲氧基或氰基為末端基，所合成之單體最後經矽氧化反應接到聚矽氧烷主鏈上，所合成之液晶聚合物利用紅外光光譜儀、核磁共振儀和質譜儀鑑定其液晶相，所合成之液晶聚合物具應用於高效能氣相層析儀靜相材料之潛力。

The goal of this proposed research is mainly focused on the synthesis of side chain liquid crystalline polymers containing thiophene-based mesogens, vinyl linkage and plor end group. Two series of new side chain liquid crystalline polymer will be prepared according to careful molecular design of polymerbackbond, spacer, mesogen and polar end group. Polysiloxane is used as the polymerbackbond, Three to nine methylene units are used as flexible spacer. Trans-styrtlthiophene group is designed for the mesogen, and a methoxy and a cyano are desinged for the end grooup. The prepared liquid crystal monomers are grafted onto the polysiloxane backbone via hydrosilation reaction. The obtained monomers and polymers are characterized by IR. NMR and Mass analysis. The sythesized liquid crystalline polymers have potential application in the fielc of stationary phase of gas charomatography.