以苯并噁嗪为基体树脂,短切高硅氧纤维为增强材料,制备了一种模压用复合材料。研究了该树脂的热性能、固化动力学性能及力学性能。结果表明,苯并噁嗪增强高硅氧纤维混合物随固化温度升高工艺窗口未发生显著变化,利用Kissinger、Crane法得到固化反应活化能为69.619 kJ/mol,反应级数为0.95。复合材料拉伸强度为35.5 MPa,,压缩强度为196 MPa,线烧蚀率为0.14 mm/s. Using benzoxazine as matrix resin and chopped high silica fiber as reinforcing material, a composite material for molding was prepared. The thermal properties, curing kinetics and mechanical properties of the resin were studied. The results show that there is no significant change in the process window of benzoxazine enhanced high silica fiber mixture with increasing curing temperature. The activation energy of curing reaction is 69.619 kJ / mol with Kissinger and Crane method, and the reaction order is 0.95. The tensile strength of composite was 35.5 MPa, the compressive strength was 196 MPa and the ablation rate was 0.14 mm / s.