Synthesis and Liquid Crystalline Behavior of Photoreactive Side Chain Liquid Crystalline Polyoxetanes Containing Cinnamoyl Biphenyl Mesogen
作者:Chih-Hung Lin
DOI:10.14233/ajchem.2015.18540
日期:——
A new series of photo-cross-linkable side chain liquid crystalline polymers based on the oxetane backbone containing 4-cinnamoyl biphenyl groups as the mesogenic and photo reactive group in side chain were prepared by ring-opening polymerization and characterized. The thermal transition and mesomorphic nature of the resulting polymers and monomers were determined by differential scanning caloriametry, polarized optical microscope and X-ray technique. All the synthesized polymers showed enantiotropic liquid crystal behaviour. It was found that the length of the flexible spacer had a great influence on both the thermal transitions and mesomorphic nature for the resulting polymers and monomers.
一种基于氧杂环骨架的新系列光交联侧链液晶聚合物被制备,这些聚合物的侧链含有4-肉桂酰基联苯基团作为介质和光反应团,采用开环聚合方法合成并进行了表征。通过差示扫描量热法、偏振光学显微镜和X射线技术确定了所得到的聚合物和单体的热转变及其介晶性质。所有合成的聚合物均表现出外消旋液晶行为。研究发现,柔性间隔的长度对所得到的聚合物和单体的热转变及介晶性质都有较大影响。