没食子酸环氧树脂/蓖麻油酸多胺体系固化动力学及性能  

Curing kinetics and properties of gallic acid epoxy resin/ricinoleic acid-based polyamine thermosetting system

作　　者：刘振 余云 张孟航 尹浏烨 段雨霏 侯桂香 LIU Zhen;YU Yun;ZHANG Menghang;YIN Liuye;DUAN Yufei;HOU Guixiang(Tangshan Key Laboratory of Functional Polymer Materials,College of Materials Science and Engineering,North China University of Science and Technology,Tangshan 063210,China)

机构地区：[1]华北理工大学材料科学与工程学院,河北省无机非金属材料重点实验室,河北唐山063210

出　　处：《中国塑料》2022年第2期75-81,共7页China Plastics

基　　金：河北省大学生创新项目(R2020039);华北理工大学培育基金项目(SP201515);河北省教育厅项目(QN2021114);唐山市功能高分子材料基础创新团队(21130201D)。

摘　　要：以蓖麻油和三乙烯四胺为原料合成蓖麻油酸多胺固化剂(COAPA),再将其与没食子酸环氧树脂(GAER)混合组成全生物基GAER/COAPA固化体系,采用非等温差示扫描量热法(DSC)对其固化反应过程进行了研究,确定了固化体系最佳质量配比为7∶3(GAER∶COAPA),获得了最佳固化工艺温度参数;利用Kissinger方程和Šesták-Berggren自催化模型拟合得到固化反应活化能和动力学参数,并将固化后的GAER体系与双酚A型环氧树脂体系的性能进行了对比。结果表明,GAER/COAPA体系的平均表观活化能为62.28 kJ/mol,当固化反应转化率(α)小于60%时符合Šesták-Berggren自催化模型;与双酚A型环氧树脂体系相比,GAER/COAPA的热分解温度参数偏低,800℃时残炭率较高,拉伸强度和弯曲模量较低、弯曲强度和玻璃化转变温度稍高。Ricinoleic acid-based polyamine(COAPA)was synthesized as a curing agent using castor oil and three ethylene four amine as raw materials and then was mixed with gallic acid epoxy resin(GAER)to form a whole biological curing system.The curing process of GAER/COAPA composite system was investigated using a nonisothermal DSC method.The optimum mass ratio of GAER to COAPA was determined to be 7:3 for the curing system,and the optimum curing temperatures were obtained.The activation energy and kinetic parameters of curing reaction were obtained by fitting and calculation using the Kissinger equation together with theŠesták-Berggren autocatalytic model.The properties of the cured GAER system were compared with that of the bisphenol-A epoxy cured system.The results indicated that the average activation energy of the GAER/COAPA system was 62.28 kJ/mol.When the conversion rate of curing reaction was less than 60%,the curing kinetics conformed to theŠesták-Berggren autocatalytic model.Compared to the bisphenol-A epoxy thermoset,the gallic acid epoxy thermoset exhibited a lower thermal decomposition temperature and a higher carbon residue rate at 800℃,and its tensile strength and flexural modulus were lower,the flexural strength and glass transition temperature were also slightly higher.

关 键 词：没食子酸环氧树脂 蓖麻油酸多胺 固化动力学 非等温差示扫描量热法 性能 

分 类 号：TQ323.5[化学工程—合成树脂塑料工业]