【摘要】 考察了高韧性预浸料用环氧树脂体系黏度对预浸料加工工艺的影响,探讨了涂膜和预浸复合工艺参数对预浸料质量的影响,采用热熔法工艺成功制备了高柔性低面密度预浸料。评价了预浸料的质量参数,单层厚度达到(25±5)μm,具有优良的粘结性和铺覆性。力学性能测试结果表明,相对于常规厚度预浸料,高柔性低面密度预浸料复合材料的层间断裂韧性、层剪强度和弯曲强度分别提高了19%、27.7%和15.3%。微观形貌观察表明高柔性低面密度预浸料制备的复合材料具有较好的界面结合强度。更多还原

【Abstract】 The effects of viscosity of high toughness epoxy resin on prepreg process technique were investigated,and the effects of process parameters during film preparation and impregnation on prepreg quality were discussed. The highly-flexible prepreg with low surface density was successfully fabricated through hot-melt method. The physical properties of high-flexible prepreg with low surface density were evaluated,which has a thickness of( 25 ± 5) μm and has stable quality and good manufacturability. Testing results showed that the mechanical properties of the composites made from the ultra-thin prepreg are enhanced especially for the interlaminar fracture toughness,interlaminar shear strength and flexural properties. Morphology observation indicated excellent interfacial properties of composites prepared from high-flexible prepreg with low surface density.更多还原