文献类型：期刊文献

中文题名：桐油酸基环氧树脂的制备及其性能研究

英文题名：Preparation and properties tung oil acid-based epoxy resin

作者：李文斌[1] 常仟永[1] 黄金瑞[1] 王义刚[1] 聂小安[1] 陈洁[1]

第一作者：李文斌

机构：[1]中国林业科学研究院林产化学工业研究所,生物质化学利用国家工程实验室,国家林业局林产化学工程重点开放性实验室,江苏省生物质能源利用与材料重点实验室,江苏南京210042

年份：2023

卷号：38

期号：5

起止页码：1-8

中文期刊名：热固性树脂

外文期刊名：Thermosetting Resin

收录：CSTPCD;;北大核心:【北大核心2020】；CSCD:【CSCD_E2023_2024】；

基金：腰果酚基功能性聚合物材料制备及性能调控研究(CAFYBB2022XB001);江苏省生物质燃料与材料重点实验室(JSBEM-S-202002);油脂基超支化聚酯反应型增塑剂的多级结构构筑及其增塑机制(32101471)。

语种：中文

中文关键词：桐油酸;马来酸酐;固化剂;环氧树脂;交联密度;热稳定性;力学性能

外文关键词：tung oleic acid;maleic anhydride;curing agent;epoxy resin;crosslinking density;thermal stability;mechanical property

分类号：TQ323.5

摘要：以桐油酸和马来酸酐为原料经过Diels-Alder加成反应合成了含有酸-酸酐基团的环氧树脂固化剂(EAMA),将其用于双酚A二缩水甘油醚(DGEBA)的固化,得到不同交联密度的环氧固化物。通过傅里叶红外光谱和核磁共振波谱表征了EAMA的结构,采用示差扫描量热分析、动态热机械分析、热稳定性分析及力学性能测试研究了(DGEBA-EAMA)体系的固化反应动力学、性能及DGEBA-EAMA的交联密度与材料性能的关系。结果表明,通过调节DGEBA-EAMA结构中酸/酸酐与环氧基物质的量比可以达到调控环氧树脂力学性能的目的。DGEBA-EAMA的拉伸强度、弯曲强度、储能模量、玻璃化转变温度和热稳定性随交联密度的增加而增加,断裂伸长率和冲击强度则呈下降趋势。值得注意的是,DGEBA-EAMA的热稳定性由固化体系的分子结构和交联密度共同决定。
The epoxy resin curing agent(EAMA)containing acid-acid anhydride group was synthesized by Diels Alder addition reaction reaction from tung oleic acid and maleic anhydride. It was used to cure bisphenol A diglycidol ether(DGEBA) to obtain epoxy cured products with different crosslinking densities. The structure of EAMA was characterized by Fourier transform infrared spectroscopy and nuclear magnetic resonance spectroscopy. The curing reaction kinetics and properties of the DGEBA-EAMA system,as well as the relationship between the crosslinking density and material properties of DGEBA-EAMA were investigated by differential scanning calorimetry,dynamic thermomechanical analysis,thermal stability analysis and mechanical performance tests. The results showed that adjusting the molar ratio of acid/anhydride to epoxy based substances in the structure of DGEBA-EAMA could achieve the purpose of regulating the mechanical properties of epoxy resin. The tensile strength,flexural strength,storage modulus,glass transition temperature,and thermal stability of DGEBA-EAMA were increased with the increase of crosslinking density. The longation at break and impact strength showed a decreasing trend. It was worth noting that the thermal stability of DGEBA-EAMA was determined by the molecular structure and crosslinking density of the curing system.