اثر مقدار موم بر خواص فيزيكي پلي اتيلن سنگين

Effect of Wax Content on Physical Properties of HDPE

In this study, physical properties of high density polyethylene such as degree of crystallinity, softening point and its blends with paraffin wax were investigated. DSC Studies show two endothermic and exothermic peaks. The endothermic peak of polyethylene is narrow and that of the wax is broad. Rheological studies show a pseudo-plastic behavior for all the blends and as the wax content increases, the viscosity of blend at high shear rate decreases and the impact strength and softening point of blends decrease due to low strength of paraffin wax. The effect of wax content on shrinkage of the blends was also investigated. It was observed that an increase in wax content results in a decrease in shrinkage of the blend.