Effect of Prepolymer Molecular Weight on Thermo-ozidative Stability of Bismaleimides

摘要：

New bismaleimides with three prepolymer molecular weights were synthesized and fabricated into graphite fiber reinforced composites. Thermo-oxidative stability of the composites under shortterm isothermal exposure was studied. These composites were exposed to isothermal ageing for up to three hours. Dynamic mechanical properties and weight loss measurements indicate that for the composite prepared from bismaleimide prepolymers with lower molecular weight, activation energy for oxidative degradation is decreased, resulting in higher total weight loss in short-term isothermal aging due to nonreacted fragments remain entrapped within the network.

关键词： Bismaleimide Thermo-ozidative Stability Composite Material Dynamic Mechanical Analysis

作者: Geng Dongbing Zeng Liming Fu Qiuzhou Zhang Yi Hu Bing

作者单位: School of Material Science and Technology,Wuhan University of Technology,Wuhan 430070 China Aerospac School of Material Science and Technology,Wuhan University of Technology,Wuhan 430070,China Aerospace Research Institute of Materials and Processing Technology(ARIMT),Beijing 100076,China

会议类型: 国际会议

会议名称: The 11th International Space Conference of Pacific-basin Societies(第11届环太平洋国际航天会议)

会议地点: 北京

会议语种:英文

页码: 481-486

在线出版日期: 2007-05-16（万方平台首次上网日期，不代表论文的发表时间）