Cardo poly (ether sulfone) toughened E51/DETDA epoxy resin and its carbon fiber composites

被引:6
|
作者
Wu, Rong-peng [1 ,2 ,3 ]
Zhang, Xing-hua [1 ,3 ]
Wei, Xing-hai [1 ,3 ]
Jing, De-qi [1 ,3 ]
Su, Wei-guo [4 ]
Zhang, Shou-chun [1 ,2 ,3 ]
机构
[1] Chinese Acad Sci, Inst Coal Chem, Res Ctr Adv Thermoplast Composites Engn, Taiyuan 030001, Peoples R China
[2] Univ Chinese Acad Sci, Ctr Mat Sci & Optoelect Engn, Beijing 100049, Peoples R China
[3] Chinese Acad Sci, Key Lab Carbon Mat, Inst Coal Chem, Taiyuan 030001, Peoples R China
[4] Naval Univ Engn, Natl Key Lab Sci & Technol Vessel Integrated Power, Wuhan 430033, Peoples R China
基金
中国国家自然科学基金;
关键词
Epoxy resin; CFRP; PES-C; Toughness; INTERLAMINAR FRACTURE-TOUGHNESS; PHASE-SEPARATION BEHAVIOR; THERMAL-PROPERTIES; GRAPHENE OXIDE; PERFORMANCE; MORPHOLOGY;
D O I
10.1016/S1872-5805(23)60741-3
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
A toughener that can effectively improve the interlaminar toughness in carbon fiber composites is crucial for various applications. We investigated, the toughening effects of phenolphthalein-based cardo poly (ether sulfone) (PES-C) on E51/ DETDA epoxy and its carbon fiber composites (CFCs). Scanning electron microscopy showed that the phase structures of PES-C/epoxy blends change from island (of dispersed phase) structures to bi-continuous structures (of the matrix) as the PES-C content increased, which is associated with reaction-induced phase separation. After adding 15 phr PES-C, the glass transition temperature (Tg) of the blends increased by 51.5 degrees C, and the flexural strength, impact strength and fracture toughness of the blends were improved by 41.1%, 186.2% and 42.7%, respectively. These improvements could be attributed to the phase separation structure of the PES-C/epoxy system. A PES-C film was used to improve the mode-II fracture toughness (GIIC) of CFCs. The GIIC value of the 7 mu m PES-C film toughened laminate was improved by 80.3% compared to that of the control laminate. The increase in GIIC was attributed to cohesive failure and plastic deformation in the interleaving region.
引用
收藏
页码:681 / 691
页数:9
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