C=C修饰的胆酸功能单体的非等温固化动力学研究  

STUDY ON THE CURING KINETICS OF DERIVATIVE OF CHOLIC ACID CONTAINING C=C BY NON-ISOTHERMAL DSC

作　　者：李涛[1,2] 韩琳[3] 朱丽荣[1,2] 

机构地区：[1]功能高分子材料教育部重点实验室,天津300071 [2]南开大学高分子化学研究所,天津300071 [3]南开大学化学学院,天津300071

出　　处：《离子交换与吸附》2013年第3期246-252,共7页Ion Exchange and Adsorption

摘　　要：采用非等温DSC法分别对3,7,12–三甲基丙烯酰基胆酸甲酯(CAME3MA)和2-甲基丙烯酰氧基-3,7,12-三甲基丙烯酰基胆酸乙酯(CAGE4MA)的固化反应进行了研究,并与2-甲基丙烯酰氧基-3-甲基丙烯酰基胆酸乙酯(CAGE2MA)固化体系进行了比较。结果显示,3个体系有相似的非等温固化曲线,但是相同升温速率的峰顶温度不同,C=C数量越多,放热峰温度越高。用Kissinger法处理非等温DSC数据,3个体系的Ea和lnA值有差别,变化趋势均为CAGE2MA>CAGE4MA>CAME3MA。由于CAGE2MA容易形成分子间氢键,因此它反应所需的活化能也比后两者大;CAME3MA的分子间作用力稍小于CAGE4MA,因此前者的固化反应活化能也比后者略低。The derivatives of cholic acid, methyl 3a,7a,12a-trimethacryloyl-5fl-cholancate （CAME3MA） and 2＇-methacryloxyloxyethyl-3a,7a,12a-trimethacryloyloxy-Sfl-cholan-24-ate （CAGE4MA） were prepared. The curing kinetics of CAME3MA and CAGE4MA were studied separately by DSC under non-isothermal conditions and compared with the curing kinetics of CAGE2MA. The DSC curves of the non-isothermal curing of the three curing systems were similar. At the same heating rate, the peak temperature of the DSC curves increased as the number of C=C in the compounds increased. Because of the differences in the molecular structure of CAGE2MA, CAME3MA and CAGE4MA, Ea and lnA of the curing systems calculated by Kissinger method were different and the changing trend was CAGE2MA〉CAGE4MA〉CAME3MA. It was easier for CAGE2MA to form intermolccular hydrogen bonding than the other two systems, so that the Ea of CAGE2MA was the highest among the 3 systems.

关 键 词：DSC 固化动力学 胆酸功能单体 

分 类 号：O631[理学—高分子化学]