“离位”增韧T800H/5228ES复合材料的制备与性能研究

Study on preparation and property of T800H/5228ES composites by Ex-situ toughening Method

基于"离位"增韧技术,以PAEK膜为增韧膜,制备了T800H/5228ES预浸料及其复合材料,通过Ⅰ型层间断裂韧性、Ⅱ型层间断裂韧性和低速冲击等试验,对比考核"离位"增韧T800H/5228ES复合材料相对于传统树脂增韧X850复合材料的增韧特性,分析了T800H/5228ES复合材料的增韧机理。结果表明,相比于X850复合材料,T800H/5228ES复合材料有较高的GⅠC值、GⅡC值和CAI值,"离位"增韧在T800H/5228ES复合材料层间形成了热固性树脂/热塑性树脂双连续相结构,这种结构大大提高了复合材料层压板的层间断裂韧性、冲击损伤阻抗和损伤容限等性能。

T800H/5228ES prepreg and composites were prepared by using PAEK toughening film according to Ex- situ toughening technology. Compared with X850 composites,the toughening characteristics of composites was investigated and the toughening mechanism was analyzed through mode I interlaminar fracture toughness,mode Ⅱ interlaminar fracture toughness and low-velocity impact tests. The results showed that compared with X850 composites, the composites had higher GI c value,Gn c value and CAI value. Based on Ex-situ toughening concept, the thermoplastic/thermosetting co-continuous phase was formed,which dramatically improved the interlaminar fracture toughness,impact damage resistance and impact damage tolerance.