摘要
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 ge1Tg is found to be 70.2 ℃. 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.
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 ge1Tg is found to be 70.2 ℃. 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.
基金
National Basic Research Program of China (2003CB615604)
