| SYNTHESIS AND CHARACTERIZATION OF COPOLYMER OF 2,5-BIS[（4-METHOXYPHENYL）OXYCARBONYL]STYRENE AND STYRENE WITH HIGH MOLECULAR WEIGHT |
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| 作者姓名： | Jiao-liLi Xing-heFan Yong-fengZhao[ Xiao-fangChen Qi-fengZhou |
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| 作者单位： | DepartmentofPolymerScienceandEngineering,CollegeofChemistryandMolecularEngineering,PekingUniversity,Beijing100871,China |
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| 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℃ 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.
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| 关 键 词： | 合成 2 5-二[（4-甲氧苯基）氧羰基]苯乙烯 苯乙烯 共聚物 液晶 抗拉强度 分子重 |
| 收稿时间： | 2003-02-27 |
| 修稿时间： | 2003-04-23 |
SYNTHESIS AND CHARACTERIZATION OF COPOLYMER OF2,5-BIS[(4-METHOXYPHENYL)OXYCARBONYL]STYRENE AND STYRENE WITH HIGH MOLECULAR WEIGHT* |
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| Jiao-liLi Xing-heFan Yong-fengZhao Xiao-fangChen Qi-fengZhou.SYNTHESIS AND CHARACTERIZATION OF COPOLYMER OF2,5-BIS[(4-METHOXYPHENYL)OXYCARBONYL]STYRENE AND STYRENE WITH HIGH MOLECULAR WEIGHT*[J].Chinese Journal of Polymer Science,2004,0(3):289-293. |
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| Authors: | Jiao-li Li Xing-he Fan Yong-feng Zhao Xiao-fang Chen Qi-feng Zhou |
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| Institution: | Department of Polymer Science and Engineering, College of Chemistry and Molecular Engineering,Peking University, Beijing 100871, China |
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| Abstract: | 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℃ 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. |
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| Keywords: | Copolymer of MPCS and St Liquid crystal Tensile strength CHARACTERIZATION OF COPOLYMER SYNTHESIS MOLECULAR WEIGHT HIGH tensile strength decreases tensile modulus increased mechanical properties Experimental results show turn crystalline phase dependent content optical microscopy liquid crystalline behavior |
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