邻甲硼酚醛树脂固化双酚-A环氧树脂及其复合材料的性能

用邻甲硼酚醛树脂(BoPFR)固化双酚-A环氧树脂(BPAER),制备了含硼酚醛的高性能玻璃钢复合材料.分析了固化过程,研究了固化树脂以及玻璃纤维层压板的力学性能、热性能和电性能.当m(BoPFR)/m(BPAER)为1.0∶0.5时,复合材料的玻璃化转变温度从198.4 ℃下降到134.5℃,材料韧性提高.固化物有良好的耐热性能,当m(BoPFR)/m(BPAER)为1.0∶0.2时,材料在900℃时的残留率为25.83％,热降解动力学符合一级反应动力学；玻璃纤维层压板拉伸强度提高了一倍,而电性能变化不大.

Properties of boron-containing o-cresol-formaldehyde resin cured BPAER and its fiberglass-reinforced composite

High-performance fiberglass-reinforced composites comprising boron-containing o-cresol formaldehyde resin(BoPFR) were prepared via curing bisphenol-A epoxy resin(BPAER) with BoPFR.The curing process was analyzed.The mechanical,thermal and electrical properties of the cured resin and its fiberglass-reinforced laminate were studied.When the mass ratio of BoPFR to BPAER was 1.0 ∶ 0.5,the glass transition temperature of the composites lowered from 198.4 ℃ to 134.5 ℃ and thereby the toughness of the composites increased.The cured resin had good thermal property.The residual rate of the cured sample at 900 ℃ was 25.83% when the mass ratio of BoPFR to BPAER was 1.0 ∶ 0.2.The thermal degradation kinetics accorded with first-order reaction.The fiberglass-reinforced laminate′s tensile strength increased by 100% and whereas its electrical properties changed little.