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.
作者
李洪峰
王德志
刘仲良
曲春艳
顾继友
冯浩
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)
出处
《复合材料学报》
EI
CAS
CSCD
北大核心
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)
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
bisphenol A-cyanate resin
core-shell rubber
toughness
mechanical property
high-temperature resistant
dielectric property
