摘要
采用固体扭转法研究了一种玻璃纤维织物/环氧预浸料和2种碳纤维织物/环氧预浸料的流变特性,为测定凝胶点和研究凝胶化过程提供了一种可行的表征方法。在此基础上考察了试样尺寸和纤维织物结构对预浸料凝胶特性的影响。结果表明:试样宽度对测试结果基本没有影响,而试样厚度增加会引起预浸料动态模量的降低,凝胶点不易判定;纤维织物结构对预浸料凝胶点有很大影响,说明预浸料流变特性反映的是树脂流变特性与纤维网络可变形性综合作用的结果。
A kind of glass fiber textile/epoxy prepreg and two kinds of carbon fiber textile/epoxy prepregs were studied by means of the solid torsional method,which provides a feasible measurement for the gel point and gelation process.The effects of the sample dimension and the type of fabric on the gel properties of the prepreg were investigated.The results show that the influence of the sample width on the gelation is negligible,while the increase of the sample thickness results in the decrease of the dynamic modulus,making the gel point less distinguishable.Textile fabric affects the gel point of prepreg significantly,so it demonstrates that the rheological property of prepreg is an integrated behavior of resin rheological property and the deformability of fiber bed.
出处
《复合材料学报》
EI
CAS
CSCD
北大核心
2009年第5期8-13,共6页
Acta Materiae Compositae Sinica
基金
国家自然科学基金项目(50803002)
