TRANSITIONS AND MODRPHOLOGY OF MAIN-CHAIN LIQUID CRYSTALLINE POLYMERS WITH X-SHAPED MESOGENS  

作　　者：吴薇 李自法 周其风 叶美玲 徐懋 

机构地区：[1]Polymer Physics Laboratory,Institute of Chemistry,Academia Sinica, Beijing 100080 [2]Department of Chemistry, Zhengzhou University, Zhengzhou [3]Department of Chemistry,Peking University, Beijing.

出　　处：《Chinese Journal of Polymer Science》1994年第4期337-344,共8页高分子科学（英文版）

基　　金：This work was supported by the National Natural Science Foundation of China(Grant No.29,070,196)and the Science Foundation of Polymer Physics Laboratory,Academia Sinica.

摘　　要：The transitions and morphology of a series of main-chain liquid crystalline polymer with X-shaped mesogens were studied by means of DSC,SALS and polarizing microscopy techniques. Aneven-odd effect was observed for samples with different size of the substituents on the mesogenends. The isotropization process was similar to that of main-chain polymers with rod-likemesogens. No crystallization was detected for specimens cooling down from their isotropic meltstate. However two of the samples may crystallize in cooling process directly from the liquidcrystalline state.The transitions and morphology of a series of main-chain liquid crystalline polymer with X-shaped mesogens were studied by means of DSC,SALS and polarizing microscopy techniques. Aneven-odd effect was observed for samples with different size of the substituents on the mesogenends. The isotropization process was similar to that of main-chain polymers with rod-likemesogens. No crystallization was detected for specimens cooling down from their isotropic meltstate. However two of the samples may crystallize in cooling process directly from the liquidcrystalline state.

关 键 词：Liquid crystalline polymer X-shaped mesogen Transition Morphology 

分 类 号：O631[理学—高分子化学]