Micro-structure and Heat-resistance of MWCNTs /PES-MBAE Composite

• Published in: Journal of Harbin University of Science and Technology
• Main Authors: CHEN Yu-fei, GENG Cheng-bao, HAN Yang, LI Zhi-chao
• Format: Article
• Language: Chinese
• Published: Harbin University of Science and Technology Publications 2018-02-01
• Subjects: carbon nano-tubes; polyether sulfone; bismaleimide; micro-structure; heat-resistance
• Online Access: https://hlgxb.hrbust.edu.cn/#/digest?ArticleID=1478

Polymer matrix ( MBAE) was prepared by reactive diluent which contained diallyl bisphenol A ( BBA) and bisphenol-A diallyl ether ( BBE) with 4，4’-diamino diphenyl methane bismaleimide ( MBMI) . Polyether sulfone ( PES) and acid-MWCNTs as modifiers were used to prepare MWCNTs /PES-MBAE composite was through in-situ polymerization method. Acid-MWCNTs were analyzed by Transmission Electron Microscope ( TEM) and Fourier transform-infrared spectroscopy( FT-IＲ) . Microstructure and phase structure of the composite were observed by Scanning Electron Microscope( SEM) . The results showed that polar groups could be generated on the surface of MWCNTs with a large ratio of length to diameter in the system of mixed acid for 2 hours，and evenly dispersed in the composites. FT-IＲ showed that the characteristic peaks were at 3 448 cm － 1 and 1 635 cm － 1，to infer the existence of － COOH. PES presented as two-phase structure in MBAE matrix，PES resins evenly dispersed in polymer matrix with“honeycomb”shape. Ｒesults of heat resistance of composites showed that the thermal decomposition temperature would decline when MBAE matrix mixed with PES，but acid-MWCNTs can enhance the thermal stability of composite materials. When the content of PES was 2wt% and acid-MWCNTs was 0. 02wt%，the thermal decomposition temperature of MWCNTs /PES-MBAE was 453. 73℃，which is 15. 40℃ higher than that of matrix resin.