摘要
Side chain liquid crystalline golysiloxanes conta ing biphenyl and benzyl ether mesogen were synthesized by the hydrosilation of poly(methylhydrcsiloxane) with 4-(4-allyloxybenzytoxy)-4'- methoxybiphenyl(M_1),4-(4-allyloxybenzyloxy)-4'-ethoxybiphenyl(M_2),4-(4-allyloxybenzyloxy)-4'- propoxybiphenyl(M_3),4-(4-allyloxybenzyloxy)-4'-butoxybiphenyl(M_4),4-(4-allyloxybenzyloxy)-4'- pentyloxybiphenyl(M_5).The phase behavior of monomeric and polymeric liquid crystals was chararcterized by differential scanning calorimetry and optical polarization microscopy.Both the monomeric and polymeric liquid crystals exhibit liquid crystal behaviors.
研究了含有联苯和苯甲醚基团的液晶聚硅氧烷的合成及表征,合成了4-(4-烯丙氧基苯甲氧基)-4′-甲氧基联苯(M_1),4-(4-烯丙氧基苯甲氧基)-4′-乙氧基联苯(M_2),4-(4-烯丙氧基苯甲氧基)-4′-丙氧基联苯(M_3),4-(4-烯丙氧基苯甲氧基)-4′-丁氧基联苯(M_4),4-(4-烯丙氧基苯甲氧基)-4′-戊氧基联苯(M_5)等五种单体液晶,用硅氢加成法合成了它们的聚硅氧烷接枝聚合物,用示差扫描量热法和偏光显微技术测定了它们的相变化,所有合成的液晶表现出良好的液晶性.
基金
The project supported by the National Natural Science Foundation
the Doctoral Programme Foundation of Institution of Higher Education of China
