含硅芳炔（PSA）树脂是一类具有优异耐热性的树脂基体，其纤维复合材料可应用于航空航天领域，但是PSA树脂与纤维的复合材料存在界面结合较弱的问题。文中针对这个问题，以T300 碳纤维/PSA树脂复合材料为对象开展研究。首先，对T300 碳纤维布进行高温处理，并进行了热重分析、红外光谱、X射线光电子能谱及扫描电镜表征；其次，制备了T300/PSA 树脂复合材料，探究了其性能变化；最后，用端炔基苯并噁嗪（BA）偶联剂涂敷高温处理后的碳纤维布，再与PSA树脂复合，研究了复合材料性能变化。结果表明，高温处理的T300 碳纤维/PSA 树脂复合材料力学性能提高，高温处理的T300 碳纤维布再经BA偶联剂涂敷，其PSA树脂复合材料的力学性能可进一步提高，常温弯曲强度提高到了413.1 MPa，提升幅度为53.9%；450 ℃弯曲强度提高到了295.5 MPa，提升幅度为44.3%。
Poly(silylene arylacetylene) (PSA) resin is a new kind of polymer materials with excellent heat resistance, usually used as resin matrices for composite materials in aerospace fields. However, the interfacial adhesion between fibers and PSA resin is weak. In this work, the interface properties of T300 carbon fiber reinforced PSA resin composite were studied. Firstly, T300 carbon fiber cloth was treated at various temperatures, characterized by TG, FT- IR, XPS and SEM, and then the T300/PSA composites were prepared. Secondly, a benzoxazine with terminal acetylene (BA) was used as a coupling agent and coated on the surface of T300 cloth which was treated at high temperature, and then the T300/PSA composite with BA was prepared. The results show that high temperature treatment can improve the mechanical properties of the T300/PSA composites. What’ s more, the coating of BA coupling agent can further improve the mechanical properties of the T300/PSA composites. The flexural strength of T300/PSA composite at room temperature is increased up to 413.1 MPa, with an increase rate of 53.9% ; and the flexural strength at 450 ℃ is increased up to 295.5 MPa, with an increase rate of 44.3%.