Damage tolerant composites comprising high strength filaments in the form of bundles or tows of continuous fiber and a tough phase separated, crosslinked epoxy resin matrix are disclosed. The crosslinked epoxy resin matrix comprises infusible particles that reside primarily between plies of the composite and critically have a median particle size between 10 - 75 microns. Prepregs for making the damage tolerant composites and methods of making such prepregs and the epoxy resin compositions thereof are also disclosed. The epoxy resin compositions comprise the infusible particles which become segregated as to size on a surface layer of the prepreg during the process of combining the high strength filaments of the prepreg and the resin containing the epoxy resin composition. Alternatively, the infusible particles may be disposed directly on the epoxy resin surface of the prepreg.
本发明公开了由连续纤维束或纤维束形式的高强度长丝和坚韧的相分离交联环氧
树脂基体组成的耐损伤复合材料。交联环氧
树脂基体包括可注入颗粒,这些颗粒主要位于复合材料的层间,中值粒径介于 10 - 75 微米之间。此外,还公开了用于制造耐损伤复合材料的预浸料、制造此类预浸料的方法及其环氧
树脂组合物。环氧
树脂组合物包括可渗透颗粒,在将预浸料的高强度长丝与含有环氧
树脂组合物的
树脂结合的过程中,这些颗粒会在预浸料的表层上按尺寸分离。或者,可注入颗粒可以直接放置在预浸料的环氧
树脂表面。