2′-甲基丙烯酰氧基-3α-甲基丙烯酰基胆酸乙酯固化动力学研究  

STUDY ON THE CURING KINETICS OF 2’-METHACRYLOXYLOXYETHYL-3α-METHACRYLOYLOXY -5β-CHOLAN-24-ATE BY DSC

作　　者：李涛[1] 胡祥正[2] 周宏健[3] 

机构地区：[1]功能高分子材料教育部重点实验室,南开大学高分子化学研究所,天津300071 [2]天津科技大学理学院,天津300457 [3]天津科技大学食品工程与生物技术学院,天津300457

出　　处：《离子交换与吸附》2013年第2期165-173,共9页Ion Exchange and Adsorption

摘　　要：根据文献合成了含有两个双键的胆酸衍生物—2′-甲基丙烯酰氧基-3α-甲基丙烯酰基胆酸乙酯(CAGE2MA),采用非等温DSC法和等温DSC法研究其固化反应。采用Kissinger法处理非等温DSC数据得到动力学数据:Ea=90.16kJ/mol、lnA=21.97和n=0.936。通过积分等转化率法及自催化动力学模型分别处理等温固化DSC数据,前者表明随着反应的进行,Ea和lnA值逐渐减小;后者表明固化温度越高,自催化曲线与实验数据拟合得越好,在高转化率阶段,实验数据与拟合曲线出现偏差。Curing kinetics of 2＇-Methacryloxyloxyethyl-3α-methacryloyloxy-5β-cholan-24-ate （CAGE2MA） was studied by DSC. Based on the experimental results of non-isothermal DSC, Ea=90.16kJ/mol, lnA=21.97 and n=0.936 were obtained by Kissinger method. From isothermal DSC experiments, E, and lnA decreased with the increase of a by integral isoconversional method. The experimental data were fitted autocatalytic model better when the reaction temperature was higher. When the conversion was higher than 0.8, the fitting curves deviated slightly from the experimental data.

关 键 词：DSC 固化动力学 胆酸衍生物 

分 类 号：O63[理学—高分子化学]