Relations between Structure and Properties of Surface-treated Glass Fiber Reinforced Polyphenylene Sulfide

摘要

@@1.Introduction Polyphenylene sulfide (PPS) is a semi-crystalline engineering thermoplastic with outstanding properties, such as good chemical resistance, high temperature resistance, good physical and mechanical properties and so on. As a engineering thermoplastic, however, it is brittle and has a low elongation at break, which limits its applications. In recent years, many researchers have studied on improving those properties. Fibers reinforced polymers have been widely used in many areas. Glass fiber is usually used as reinforcement because of its low cost and excellent properties. It is well known that the interfacial adhesion is very important to the mechanical properties of the composites. However, as an inorganic filler, glass fiber has relative poor compatibility with the polymer matrix. Hence the surface treatment of the glass fiber is very important in glass fiber reinforce polymer matrix. In this work, polyphenylene sulfide/glass fiber (PPS/GF) composite was prepared directly via melt mixing, and in order to improve the compatibility of the two components, the glass fiber was surface-treated in several ways. The micro-structure, crystallization, electrical and mechanical properties of PPS/GF composite were studied by scanning electron microscope (SEM), X-ray diffractometer (XRD), differential scanning calorimeter (DSC), broadband dielectric constant detector and so on. The compatibility between those two components was studied by testing the contact angles and surface free energy of the composite. The results show that adding glass fiber into PPS matrix improved the mechanical property of the composite, which is due to the improvement of the compatibility between the treated glass fiber and the matrix PPS. In addition, the presence of glass fiber affected the crystallinity and the electrical property of PPS, and the processibility of the PPS was also greatly improved.