低粘度环氧树脂VIMP工艺性能研究  

A Study of Processing Properties of an Epoxy Resin System Used in VIMP

作　　者：刘卓峰[1] 肖加余[1] 曾竟成[1] 江大志[1] 刘钧[1] 

机构地区：[1]国防科技大学航天与材料工程学院,湖南长沙410073

出　　处：《国防科技大学学报》2008年第5期20-24,共5页Journal of National University of Defense Technology

基　　金：国家"863"基金资助项目(2007AA03Z563)

摘　　要：VIMP(真空注射模塑)工艺以其低成本、环保和适于大型制件一次整体成型等优点得到了广泛应用。本文对VIMP工艺用低粘度环氧树脂体系进行了固化反应动力学和粘度分析,确定了最佳固化温度,建立了树脂体系的流变模型,模型分析结果与实验结果吻合较好,根据此流变模型预报了工艺窗口。并进行了VIMP模塑板材工艺实验,测试了板材的纤维体积含量和力学性能。VIMP （Vacuum Infusion Molding process） is widely used because it has many advantages, such as low cost, environmental protection and suitable for holistic mould of large composite structures. Curing reaction and rheological behavior of a low viscosity epoxy resin system were studied by DSC and viscosity experiments and an optimum curing temperature was found for the resin system. Based on Dual-Arrhenius equation, a theological model of the resin system was estab/ished, and predicted viscosity values of the resins were in good agreement with the results of the experimental results. The low viscosity processing window for the VIMP was determined by the rheological model. A GFRP laminate was fabricated by the VIMP, and the fiber volume content and mechanical strength of the laminate composites were investigated.

关 键 词：VIMP 环氧树脂 固化动力学 流变特性 力学性能 

分 类 号：TB332[一般工业技术—材料科学与工程]