Properties of Glass-Fiber Reinforced Thermoplastics with GF Joined Structure

摘要

In most cases, the glass-fibers (GF) in GF reinforced thermoplastics are generally dispersed in a discontinuous form in the matrix polymer. However, if the GF can be made to adhere to each other in the matrix polymer, new properties can be expected. It is well acknowledged that polymers with high affinity to GF would migrate to the interface of GF. By utilizing this phenomenon, we have succeeded in making a structure whereby the GF are apparently joined (bonded) with each other and surrounded by the matrix polymer. This material was found to have a significantly higher heat distortion temperature (HDT) than that of conventional GF reinforced thermoplastics. In the case of high content of GF, the GF joined structure can form easily by using only a small quantity of bonding resin. HDT of the material with GF joined structure is controlled inherently by the structure which is maintained by the adhesive resin. Therefore, HDT was determined by the heat resistance that small quantity of adhesive resin. Using PA66 as the adhesive resin, the HDT of GFPP and GFPS with GF joined structure are beyond 200°C that far exceeds the melting point of the matrix PP or the glass transition temperature of the matrix PS respectively.