The Study Of Physical And Heat-Aging Properties Of Short Fiber-Cr Composite

In this thesis, the physical and heat-aging properties of short fiber-CR composite were mainly studied, and the swelling properties of the composite were also studied.Firstly, take polyester short fiber, nylon short fiber and cotton powder short fiber for examples, a study was made on the influence of content and kind of short fibers on physical and heat aging properties of short fiber-CR composites. The experiment results showed that the rigidity of the composite increased as the content of the fiber increased, and the tear strength, the modulus at 20% in L direction also increased; thereinto, the reinforcement effect of nylon short fiber was the best, and the cotton powder short fiber was the worst. As the content of the fiber increased, the heat aging properties of the composites were increased differently; thereinto, the composite of Nylon-CR was the best. As the content of the fiber increased, the swelling properties of the composites also increased evidently; the properties of short fiber -CR composites showed anisotropism.Secondly, take pretreated and none-pretreated nylon short fiber for examples, a study was made on the influence of the effects of interfacial adhesion between short fiber and rubber on physical, heat aging and swelling properties of short fiber-CR composites. The results showed that, the better the interfacial adhesion of the composites, the better the physical, heat-aging, and swelling properties.Thirdly, take pretreated nylon short fiber with the length of 1mm and 3mm for...