文献类型：期刊文献

中文题名：聚氨酯丙烯酸酯增韧改性乙烯基酯树脂

英文题名：TOUGHTENING MODIFICATION OF VINYL ESTER RESIN BY POLYURETHANE ACRYLATE

作者：白国栋[1];刘烨[1];管涌[1];江先龙[2]

机构：[1]华东理工大学材料科学与工程学院上海市先进聚合物材料重点实验室,上海200237;[2]上海欧阳化工有限公司,上海201111

年份：2020

期号：11

起止页码：87

中文期刊名：复合材料科学与工程

外文期刊名：Composites Science and Engineering

收录：北大核心:【北大核心2017】；

语种：中文

中文关键词：聚氨酯丙烯酸酯;改性;乙烯基酯树脂;韧性;复合材料

外文关键词：urethane acrylate;modification;vinyl ester resin;toughness;composite

摘要：为提高乙烯基酯树脂韧性,本文以二苯基甲烷二异氰酸酯(MDI)、聚丙二醇(PPG)和甲基丙烯酸羟乙酯为原料,合成聚氨酯丙烯酸酯(PUA),再与乙烯基酯树脂共混,在引发剂的作用下通过自由基共聚合反应制得含有聚氨酯丙烯酸酯嵌段的改性乙烯基酯树脂。通过力学性能测试研究了不同聚氨酯丙烯酸酯的添加量对改性树脂力学性能的影响,结果表明,聚氨酯丙烯酸酯能有效改善乙烯基酯树脂脆性。当MDI∶PPG=3∶2,制备的聚氨酯丙烯酸酯添加量为15%时,其拉伸强度达到56.3 MPa,断裂伸长率为22.5%,缺口冲击强度为2.56 kJ/m^2,断裂伸长率与冲击强度分别为未改性树脂的2.45倍和2.29倍,综合力学性能最好。以改性树脂为基体树脂,通过拉挤成型工艺制备的玻纤增强光缆加强芯,其断裂伸长率提升了21.5%,高温弯曲性能得到改善。
In order to improve the toughness and expand the application of vinyl ester resin,polyurethane acrylates(PUA)were synthesized by polycondensation of diphenylmethane diisocyanate(MDI),polypropylene glycol(PPG)and hydroxyethyl methacrylate,and then blended with vinyl ester resin.Modified vinyl ester resin containing polyurethane acrylate blocks was synthesized by radical copolymerization under the action of initiator.The effects of addition of different urethane acrylates on the mechanical properties of the modified resins were investigated.The results show that the urethane acrylate can effectively improve the tougheness of the vinyl ester resin.When MDI∶PPG=3∶2 and the polyurethane acrylate is added at 15%,the tensile strength is 56.3 MPa,the elongation at break is 22.5%,the notched impact strength is 2.56 kJ/m^2.Elongation at break and impact strength are 2.45 times and 2.29 times of the unmodified resin,respectively.The comprehensive mechanical properties are the best.The elongation at break of optical fiber reinforced core prepared by pultrusion process using modified resin as matrix resin increases by 21.5%,and the high temperature bending performance is improved.