TTT Diagram Used to Control Phase Structure of 2/4 Functional Epoxy Blends for Advanced Composites |
| |
Authors: | Zhang An Xuefeng Tang Bangming Yi Xiaosu |
| |
Institution: | aNational Key Laboratory of Advanced Composites Materials, Beijing Institute of Aeronautical Materials, Beijing, 100095, China |
| |
Abstract: | This article uses a 2/4 functional epoxy blend system (E-54/AG-80) cured with diaminodiphenyl sulphone(DDS) as a raw material and develops a methodological procedure to establish a cure kinetic model with isothermal and dynamic differential scanning calorimeter(DSC) method and a gelation model with round-disk compression mode dynamic mechanical analyzer(DMA), thus acquiring a series of experimental data. Characteristic temperatures such as initial glass transition temperature Tg0, gelation glass transition temperature gelTg, and infinite glass transition temperature Tg∞ are determined. The cure degree at gelation is turned out to be 0.45, while gelTg is found to be 70.2 °C. The data are then used to form time-temperature-transition(TTT) diagram of the system, which serves to be a tool for process optimization of epoxy-matrix composites. A new cure processing is therefore derived from the TTT diagram. The final phase structure obtained from a controllable method is identified through scanning electron microscope(SEM) photographs to be of ‘ex-situ’ phase morphology. |
| |
Keywords: | composites epoxy resins TTT diagram phase structure |
本文献已被 万方数据 ScienceDirect 等数据库收录! |
|