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通过多步接枝工艺制备了系列二氧化钛粒子(M系列粒子)/氰酸酯树脂(CE)基复合材料,总结了制备最佳工艺条件,讨论了复合材料的固化动力学、耐热性能,分析了复合材料微观形貌变化与性能提升之间的联系。结果表明,M系列粒子的引入,在降低复合材料活化能,有利于固化成型的同时,未改变固化机理。少量M-2粒子的引入,使CE的耐热性能大为改善。当M-2粒子含量为4%(质量分数)时,实验数据表明,储能模量增幅为60%,玻璃化温度增幅为12%。
A series of titanium dioxide particles (M series particles) / cyanate resin (CE) matrix composites were prepared by multi-step grafting process. The optimum preparation conditions were summarized. The curing kinetics and heat resistance of the composites were discussed. The relationship between the changes of composite microstructure and performance improvement. The results show that the introduction of M series of particles, in reducing the activation energy of the composite material, is conducive to curing molding, without changing the curing mechanism. The introduction of a small amount of M-2 particles, so that the heat resistance of CE greatly improved. When M-2 particle content is 4% (mass fraction), the experimental data show that the storage modulus increases by 60% and the glass transition temperature increases by 12%.