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将二胺型苯并噁嗪(BOZ-M)与F-51环氧树脂和线性酚醛树脂共混,得到改性BOZ-M玻璃纤维增强层压复合材料基体树脂(BEP),并制备了相应的浇注体和E玻璃布层压板,采用DSC,DMA,TMA等手段考察其固化行为、尺寸稳定性及力学性能等,并采用SEM研究其浇注体断面形貌结构。结果表明,与BOZ-M相比,改性树脂BEP的固化反应向低温移动,凝胶化时间缩短;浇注体玻璃化转变温度提高至220℃,断裂伸长率提高至2.7%,力学性能优异;BEP/E玻璃布层压复合材料常温下具有较高的强度与模量,在180℃热态条件下有很高的力学性能保留率。
The diamine type benzoxazine (BOZ-M) was blended with F-51 epoxy resin and phenolic resin to obtain modified BOZ-M glass fiber reinforced composite material matrix resin (BEP) The castings and E glass cloth laminates were characterized by means of DSC, DMA and TMA, and their curing behavior, dimensional stability and mechanical properties were investigated. SEM was used to study the cross-sectional morphology of the castings. The results showed that compared with BOZ-M, the curing reaction of modified BEP decreased to low temperature and the gelation time shortened. The glass transition temperature of castable increased to 220 ℃, the elongation at break increased to 2.7%, and the mechanical properties were excellent ; BEP / E glass cloth laminated composite material has higher strength and modulus at room temperature, and has a high retention rate of mechanical properties under 180 ℃ hot condition.