玻璃纤维/环氧复合材料的松弛行为

THE RELAXATION BEHAVIOURS OF FIBERGLASS/EPOXY COMPOSITES

摘要

摘要: 在-150℃至200℃范围内,研究了在拉-拉形变下环氧树脂及其玻纤复合材料的动态力学温度谱。分析了填料对环氧基体松弛行为的影响。在复合材料的内耗温度谱上a转变峰高温侧观察到一个新的附加峰(a'峰),这个新的a'峰具有明显的各向异性性,还受纤维含量、纤维表面处理的影响;我们把这一附加转变归结为界面效应。计算得到了a及a'转变的活化能,并用两个峰的相对高度来表征界面的贡献。

Abstract: The dynamic mechanical temperature spectrums of epoxy resin and the fiber-glass/epoxy composites have been studied under tensile-tensile stress in the range from 150℃ to 200℃.The effect of filler on the relaxation behaviour of epoxy matrix has been analyzed.It was oberserved that there is an additional peak (a'-peak) at the higher temperature side of the glass transtition peak (a-peak) on the damping-temperature curves of composites The new a'-peak was of obvious asymmetrical characters,and affected by the. contents and the surface treatments of fiber,whieh was considered as the effect of interface.The activation energy of a and a' transtitions have been measured by experiments.The relatpve height index ψ, was introduced for evaluating the contributions of interface.