C36二聚脂肪酸基不饱和聚酯树脂固化反应动力学研究  

Curing reaction kinetics of C36 dimerized fatty acid based unsaturated polyester resin

作　　者：严旭明 黄雪[1] 杨锐钊 谭春远 冯光炷[1] YAN Xuming;HUANG Xue;YANG Ruizhao;TAN Chunyuan;FENG Guangzhu(School of Chemistry and Chemical Engineering, Zhongkai University of Agriculture and Engineering, Guangzhou 510631, China)

机构地区：[1]仲恺农业工程学院化学化工学院,广东广州510225

出　　处：《仲恺农业工程学院学报》2020年第3期8-17,共10页Journal of Zhongkai University of Agriculture and Engineering

基　　金：国家自然科学基金(31371880,31401526);广州市科技计划(201904010087);广东省创新团队(2016KCXTD003)资助项目。

摘　　要：为了深入了解C36二聚脂肪酸基不饱和聚酯树脂合成及固化过程中涉及的化学反应,采用FT-IR,1H NMR和差示扫描量热法对其进行研究.FT-IR和1H NMR分析聚酯得出,经过缩聚反应已成功合成出C36-DFA改性聚酯.TGA分析表明DFA-UPR树脂表现出相对较高分解温度,为197.83℃.DFA-UPR树脂在Tm2温度下热失重速率为39.56%/℃,与UPR树脂相比降低了30.13%.对纯聚酯和C36-DFA改性聚酯树脂体系进行等温和非等温DSC测试.根据Kissinger方法和Crane方法得出DFA-UPR和UPR树脂体系的固化反应活化能分别为32.99 kJ/mol和33.68 kJ/mol;反应级数均为0.85;指前因子分别为1.89×104和3.11×104.DFA-UPR树脂固化反应符合Sesta′k-Berggren自催化模型.Increasing environmental pollution and the depletion of resources have led industrial and academic circles to focus on the development of renewable resource materials.Vegetable oils and their derivatives are potential raw materials for polymers.Therefore,the curing kinetics of new grease-based resins It is instructive.To in-depth understand the chemical reactions involved in the synthesis and curing of C36 dimer fatty acid-base unsaturated polyester resin,the curing process was studied by FT-IR,1H NMR and differential scanning calorimetry.The results of FT-IR and 1H NMR analysis of the polyester showed that the C36-DFA modified polyester was successfully synthesized by polycondensation reaction.TGA analysis showed that the DFA-UPR exhibited a relatively high decomposition temperature of 197.83℃.At the same time,the thermal weight loss rate of DFA-UPR at Tm2 temperature is 39.56%/℃,which is 30.13%lower than that of UPR.According to the Kissinger method and the Crane method,the activation energies of the DFA-UPR and UPR resin systems were 32.99 kJ/mol and 33.68 kJ/mol,respectively;the reaction order fluctuated around 0.85,and the pre-exponential factors were 1.89×104 and 3.11×104,respectively.The DFA-UPR resin curing reaction conforms to the Sesta'k-Berggren autocatalytic model.

关 键 词：不饱和聚酯树脂 动力学 C36二聚脂肪酸 差示扫描量热法 

分 类 号：TQ322.41[化学工程—合成树脂塑料工业]