摘要
以 4,4′- ( α,ω-癸二酰氧 )二苯甲酰氯 ,2 ,4-二羟基 - 4′-烷氧基偶氮苯为单体 ,通过溶液缩聚反应 ,合成了一类新的含 T-型二维液晶基元的液晶高分子配体 ,它们的液晶行为用 DSC、偏光显微镜和 X射线衍射进行了表征。发现高分子配体均为向列型热致液晶高分子 ,液晶态温度范围较宽。液晶高分子配体的熔点 ( Tm)和液晶态的清亮点( Ti)随分子中末端烷氧基增大呈规律性变化。
A new kind of the ligand of liquid crystal polymers with T shaped two dimensional mesogens were synthesized via solution condensation polymerization using the monomers 4,4′ (α,ω decanedioyloxy) dibenzoyl dichlorides with 2,4 dihydroxy 4′ alkoxyl azobenzene. The crystalline behavior of the ligand was characterized by DSC, polarizing microscopy with a heating stage and X ray diffractometer. It was found that the ligand of polymers are thermotropic nematic liquid crystals with wide mesomorphic temperature range. The T m and T i of ligand change regularly with the increase of the end alkoxy group length.
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
2000年第3期49-52,共4页
Polymer Materials Science & Engineering
基金
:国家自然科学基金
关键词
T-型
二维液晶基元
液晶高分子配体
配合高聚物
T shaped two dimensional mesogens
ligand of liquid crystal polymers
synthesis and characterization
