首页|低介损高磷含量环氧树脂的合成及其应用研究

低介损高磷含量环氧树脂的合成及其应用研究

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以2,5-二羟苯基(二苯基)氧化膦(DPOHQ)和环氧氯丙烷(ECH)为反应原料,合成了一种高磷含量环氧树脂(DPOEP),并采用傅里叶变换红外光谱(FTIR)、核磁共振(NMR)对其结构进行了表征.以活性酯树脂(DFE617)为固化剂,探究了DPOEP的固化反应特性以及DPOEP添加量、含磷环氧树脂结构对双环戊二烯(DCPD)环氧树脂固化体系阻燃性能、介电性能、耐热性能的影响.结果表明:DPOEP/DFE617固化过程基本按一级反应进行.DPOEP能促进DCPD环氧树脂/DFE617体系凝聚相成炭,固化物的极限氧指数可达到36.6%~38.0%,达到UL94 V-0级.环氧树脂固化体系的介质损耗因数随着DPOEP添加量的增加而减小,且在较低添加量下实现环氧树脂固化材料的无卤化阻燃,同时保持良好的热性能.
Synthesis and application research of high phosphorus content epoxy resin with low dielectric loss
A high phosphorus content epoxy resin(DPOEP)was synthesized by using 2,5-dihydroxybenzyl(diphenyl)phosphine oxide(DPOHQ)and epichlorohydrin(ECH)as reactants,and then the structure of DPOEP was characterized by Fourier-transform infrared spectroscopy(FTIR)and nuclear magnetic resonance(NMR).The curing reaction characteristics of DPOEP with the curing agent of active ester resin DFE617 was studied,and the effects of DPOEP content and phosphorus-containing epoxy resin structure on the flame-retardant performance,dielectric properties,and thermal stability of dicyclopentadiene(DCPD)epoxy resin curing system were investigated.The results show that the curing process of DPOEP/DFE617 system follows a first-order reaction.DPOEP can promote the carbonization of condensed phase in the DCPD epoxy resin/DFE617 system,and the limiting oxygen index of cured resin reaches 36.6%-38%,achieving V-0 rating in the UL94 test.The dielectric loss factor of the epoxy resin curing system decreases with the increase of DPOEP content.At a lower content of DPOEP,the epoxy resin cured material is halogen-free and flame retardant while maintaining good thermal properties.

high phosphorus epoxy resincuring kineticsdielectric propertiesflame retardancythermal properties

邹静、张琴、武萌、袁恺、周友、唐安斌

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四川东材科技集团股份有限公司 国家绝缘材料工程技术研究中心,四川 绵阳 621000

遂宁市大英生态环境监测站,四川 遂宁 629399

艾蒙特成都新材料有限公司,四川 成都 610000

高磷含量环氧树脂 固化动力学 介电性能 阻燃性能 热性能

四川省科技成果转移转化示范项目绵阳市科技计划

2023ZHCG00482021JSGG002

2024

绝缘材料
桂林电器科学研究院

绝缘材料

CSTPCD北大核心
影响因子:0.809
ISSN:1009-9239
年,卷(期):2024.57(6)
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