紫外荧光双马树脂基复合材料的制备及性能

紫外荧光树脂基复合材料可用于航空航天大型复合材料制件牺牲层的制备,减少装配中垫片的使用,并通过牺牲层的荧光显色避免切削时伤及本体铺层.采用热熔法制备了紫外荧光双马树脂及国产T700碳纤维机织物/紫外荧光双马树脂预浸料,采用热压罐法制备了国产T700/紫外荧光双马树脂复合材料.系统研究了未添加紫外荧光粉、添加1.8％含量...

Preparation and properties of ultraviolet fluorescence bismaleimide resin composite

Ultraviolet fluorescence resin composites can be used to manufacture sacrificial layers of large components in aeronautics and astronautics, for the purpose of reducing the use of shims in assembly and avoiding cutting the structural layers by the fluorescent of sacrificial layers. Ultraviolet fluorescence bismaleimide resin and T700/ultraviolet fluorescence bismaleimide resin were prepared using hot melt method. T700/ultraviolet fluorescence bismaleimide resin composite laminate was prepared using autoclave. Resins and composite laminates without phosphor, and with 1.8% and 3.0% contents phosphor are systematically studied in the aspect of microstructure, physicochemical properties and thermal expansion coefficient. The results show that the laminates of composites display fluorescence under ultraviolet lamp, and the blue light emitted by laminates can be seen clearly. The crosslinked network of the resin matrix after adding phosphor coincides well with the resin containing no phosphor, however its activity decreased. The glass transition temperature of resin casting body with phosphor was about 3% lower than that of resin casting without phosphor. After adding phosphor, the tensile strength in weft direction and inter-laminar shear strength of composite laminate have no significant change. The thermal expansion coefficient of composite laminate after adding phosphor decreased by 12.14% at most compared with that without phosphors.