马来酸酐封端聚碳酸亚丙酯的大分子偶联反应  

COUPLING REACTION OF POLY(PROPYLENE CARBONATE) END-CAPPED WITH MALEIC ANHYDRIDE

作　　者：赖明芳[1] 李静[1] 杨钧[1] 王晋峰[1] 刘景江[1] 

机构地区：[1]中国科学院长春应用化学研究所高分子物理与化学国家重点实验室,长春130022

出　　处：《高分子学报》2003年第6期895-898,共4页Acta Polymerica Sinica

基　　金：国家 973课题 (项目号G19990 64 80 6)

摘　　要：The effect of temperature on the characteristic of Fourier Transform Infrared(FTIR),the dependence of the average molecular weight and the polydispersity on the annealing temperature and the relationship between linear expansion coefficients and temperature of poly(propylene carbonate) end-capped with maleic anhydride(MA-PPC) were investigated.The vibration peak of hydroxyl group at 1714?cm -1 in the FTIR spectra,which belongs to the carboxyl end-group in MA-PPC,decreases with increasing the temperature of the sample and it disappeared totally when the sample was heated over 70℃.The average molecular weight of MA-PPC almost doubled when the sample was annealed at 110～150℃ for 30 min,however the polydispersity was maintained roughly.A new relaxation transition at about 80℃ was detected on the curve of the linear expansion coefficient versus temperature that is the characteristic of macromolecular coupling or crosslinking reaction.These results confirmed that the macromolecular coupling reaction was carried out between the end carboxyl groups of MA-PPC when the sample was heated over 70℃.The effect of temperature on the characteristic of Fourier Transform Infrared( FTIR), the dependence of the average molecular weight and the polydispersity on the annealing temperature and the relationship between linear expansion coefficients and temperature of poly(propylene carbonate) end-capped with maleic anhydride( MA-PPC) were investigated. The vibration peak of hydroxyl group at 1714 cm(-1) in the FTIR spectra, which belongs to the carboxyl end-group in MA-PPC, decreases with increasing the temperature of the sample and it disappeared totally when the sample was heated over 70degreesC The average molecular weight of MA-PPC almost doubled when the sample was annealed at 110 similar to 150degreesC for 30 min, however the polydispersity was maintained roughly. A new relaxation transition at about 80degreesC was detected on the curve of the linear expansion coefficient versus temperature that is the characteristic of macromolecular coupling or crosslinking reaction. These results confirmed that the macromolecular coupling reaction was carried out between the end carboxyl groups of MA-PPC when the sample was heated over 70degreesC.

关 键 词：聚碳酸亚丙酯 马来酸酐 大分子偶联反应 二氧化碳 环氧丙烷 共聚物 温室效应 塑料 

分 类 号：O631.5[理学—高分子化学]