聚甲基丙烯酸甲酯@聚丁二烯核壳结构纳米粒子增韧双酚A型氰酸酯树脂性能  

Bisphenol A-cyanate resin toughened by polymethyl methacrylate@polybutadiene core-shell structured nanoparticles

作　　者：李洪峰[1,2] 王德志[1] 刘仲良[2] 曲春艳[1] 顾继友[2] 冯浩[1] LI Hongfeng1,2, WANG Dezhi1 , LIU Zhongliang2 , QU Chunyan1 , GU Jiyou2, FENG Hao1(1. Institute of Petrochemistry, Heilongjiang Academy of Sciences, Harbin 150040, China;2. College of Material Science and Engineering, Northeast Forestry University, Harbin 150040, Chin)

机构地区：[1]黑龙江省科学院石油化学研究院,哈尔滨150040 [2]东北林业大学材料科学与工程学院,哈尔滨150040

出　　处：《复合材料学报》2018年第3期514-520,共7页Acta Materiae Compositae Sinica

基　　金：哈尔滨市杰出青年人才项目(2016RAYYJ009);黑龙江省科学院杰青基金(CXJQ2017SH01)

摘　　要：采用聚甲基丙烯酸甲酯(PMMA)@聚丁二烯(PB)核壳结构粒子增韧双酚A型氰酸酯(BADCy)树脂,制备了PMMA@PB/BADCy树脂。研究结果表明,当PMMA@PB质量分数为6wt%时,可以取得较好的增韧效果,PMMA@PB/BADCy树脂冲击强度达到了14.32kJ·m-2,提高了83.6%;DMA和TG-DTA耐热性测试结果表明,PMMA@PB的加入未降低树脂耐热性,固化后PMMA@PB/BADCy树脂的玻璃化转变温度为236.8℃,最大热分解温度为410.0℃。SEM和TEM结果表明,PMMA@PB核壳橡胶在BADCy树脂基体中分散性好,PMMA@PB/BADCy树脂破坏断面呈现典型的韧性破坏。PMMA@PB/BADCy树脂流变特性的测试表明,PMMA@PB核壳橡胶加入后基本没有影响到BADCy树脂的流变特性,PMMA@PB/BADCy树脂的最低点黏度为0.79Pa·s左右,是树脂浸渍纤维的理想黏度。介电性能测试表明,PMMA@PB核壳橡胶增韧BADCy树脂后介电性能影响不大,当PMMA@PB质量分数为6wt%时介电常数为3.0,介电损耗为0.010。该PMMA@PB/BADCy树脂性能优异,可作为预浸料基体树脂,适用于航空航天低介电复合材料的制造。The polymethyl methacrylate（PMMA）@polybutadiene（PB）core-shell structured nanoparticles toughened bisphenol A-cyanate（BADCy）resin was prepared.The mechanical property results show that the PMMA@PB/BADCy resin presents excellent toughness when 6 wt% of PMMA@PB core-shell rubber is used.And the impact strength of the PMMA@PB/BADCy resin with 6 wt% of PMMA@PB core-shell rubber is 14.32 kJ·m-2,increased by 83.6%.The thermal performances of toughened resin were investigated by DMA and TG-DTA as well.The results show that when 6 wt% of PMMA@PB core-shell rubber is used,the glass transition temperature of the cured PMMA@PB/BADCy resin is 236.8℃ and the temperature of maximum degradation rate is 410.0℃.TEM images show that the PMMA@PB core-shell rubber has good dispersion in BADCy resin.SEM images show that the fracture surface of PMMA@PB core-shell rubber toughened BADCy resin exhibits typical toughness fracture.The rheological properties of the PMMA@PB/BADCy resin show that the PMMA@PB core-shell rubber has insignificant influence on the rheological properties of BADCy resin.The lowest viscosity of the PMMA@PB/BADCy resin is 0.79 Pa·s,which is the ideal viscosity to impregnate fiber for preparing prepreg.The dielectric properties atdifferent frequencies show that the PMMA@PB core-shell rubber has little effect on the dielectric properties of toughened BADCy.When 6 wt% PMMA@PB core-shell rubber is used,the dielectric constant is 3.0 and the dielectric loss is about 0.010.The PMMA@PB/BADCy resin system presents excellent performances and can be used as matrix of prepreg.It is suitable for the manufacture of low dielectric composites in aerospace.

关 键 词：双酚A型氰酸酯 核壳橡胶 增韧 力学性能 耐热性 介电性能 

分 类 号：TQ323.9[化学工程—合成树脂塑料工业]