Study On Fiber-reinforced PVC Composites

On the basis of surveying of the relative literature about the modification of PVC, two kinds of fibers were used to improve PVC, the light, low cost /wood fiber/PVC composites were made. Using diabase fiber instead of glass fiber reinforce PVC in order to resolve the difficult process problem.the wood fiber was treated, the configuration and the mechanical properties of the wood fiber/PVC composite were studied. Results show that The silane and macromolecule coupling agent could reform the interface of the wood fiber and PVC. the mechanical properties of the treated wood fiber/PVC composite compared with the untreated wood fiber/PVC composite improved. The wood fiber/PVC composite could not be regarded as structure materials, but it is a sort of light, low cost wood-plastic material.In the paper, the diabase fiber was also selected to reinforce PVC for the first time, which has high intensity, high rigidity and low cost, the diabase fiber was treated firstly, then during mixing, melting, pressing procedure, the diabase/PVC composite were prepared. The structure and properties of process and mechanics were analyzed by torque rheometer, omnipotence mechanics tester, IR, SEM, DMA, DSC. Results show that the properties of process droped along with the filling of the diabase fiber, but the balance torque was less than 50Nm when the content of the diabase fiber was less than 30phr, the diabase fiber/PVC composite could be processed by traditional technics. IR showed the chemic reaction take place between the coupling agents and the fiber. SEM illuminated the interfacial adhesion status and the distributing of the fibers changed better. DMA illuminated the modulus of the diabase fiber/PVC composite improved consumedly compare with PVC. DSC showed the heat resistance improved with the addition of diabase fiber. With the filling of diabase, the mechanical properties of the composite increased first and then decreased with a top tensile strength of 56.5Mpa and a top impact strength of 70.1Mpa. These illuminated that the diabase fiber reinforced PVC composites could be used as structure materials. All of the results have an important significance to the engineering of PVC.