Abstract
The relationship between of the microstructure and the mechanical properties of Polypropylene (PP) under quasi-static and dynamic tensile loading has been examined with reference to the combined effects of rolling and blending with Liquid Crystalline Polyester (LCP). The rolling process has modified the microstructure and thus has improved the quality of material. Tension test showed that by adding LCP the elongation decreases, but the tensile strength is improved. After experiencing a rolling process, the blended material shows high ductility and higher strength than PP. The fatigue failure resistance was enhanced by adding LCP not only at room temperature but at lower temperature (-10°C), and the failure tended to be more brittle. When they were rolled, the ductile properties of both materials were increased, and the samples did not rupture under any stress amplitude. Moreover, the fatigue resistance of the blended sample was enhanced beyond that of neat PP. The above results suggest that the combination of the rolling and the blending processes are an effective procedure to improve the mechanical properties of polymeric materials.
