SYNTHESIS AND CHARACTERIZATION OF COPOLYMER OF 2,5-BIS[(4-METHOXYPHENYL)OXYCARBONYL]STYRENE AND STYRENE WITH HIGH MOLECULAR WEIGHT  

作　　者：范星河 周其凤 

机构地区：[1]Department of Polymer Science and Engineering, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China

出　　处：《Chinese Journal of Polymer Science》2004年第3期289-293,共5页高分子科学（英文版）

基　　金：This work was supported by the National Natural Science Foundation of China (No. 20134010) and the Ministry ofEducation of China for the Science and Research Fund (No. 104005).

摘　　要：The random copolymers of styrene and 2,5-bis[(4-methoxyphenyloxycarbonyl)styrene] (MPCS) with different copolymerization ratio were synthesized by conventional free radical polymerization. The copolymer having high molecular weight was experimentally elucidated using a combination of proton nuclear magnetic resonance spectroscopy and gel permeation chromatography. The liquid crystalline behavior of the copolymer was studied using differential scanning calorimetry, X-ray diffractometry and polarized optical microscopy. It was found that the liquid crystalline behavior was dependent on the content of styrene. Experimental results show that the copolymer could turn into a liquid crystalline phase at about 180°C when the content of styrene was less than 20%. The mechanical properties of the copolymer were also studied. Preliminary results indicate that the tensile strength decreases while the tensile modulus increases as the content of MPCS is increased.The random copolymers of styrene and 2,5-bis[(4-methoxyphenyloxycarbonyl)styrene] (MPCS) with different copolymerization ratio were synthesized by conventional free radical polymerization. The copolymer having high molecular weight was experimentally elucidated using a combination of proton nuclear magnetic resonance spectroscopy and gel permeation chromatography. The liquid crystalline behavior of the copolymer was studied using differential scanning calorimetry, X-ray diffractometry and polarized optical microscopy. It was found that the liquid crystalline behavior was dependent on the content of styrene. Experimental results show that the copolymer could turn into a liquid crystalline phase at about 180°C when the content of styrene was less than 20%. The mechanical properties of the copolymer were also studied. Preliminary results indicate that the tensile strength decreases while the tensile modulus increases as the content of MPCS is increased.

关 键 词：Copolymer of MPCS and St Liquid crystal Tensile strength 

分 类 号：TQ316.322[化学工程—高聚物工业]