Effects of Polypropylene and Polystyrene addition on Pyrolysis of High Density Polyethylene

Abstract

This research studied the thermal degradation of High Density Polyethylene (HDPE) mixed with Polypropylene (PP) and Polystyrene (PS) in the ratios of 80:20 60:40 40:60 and 20:80 by weight. The temperature of degradation were in the range of 340 – 500 ºC under nitrogen atmosphere in order to compare with pure HDPE. The products obtained by pyrolysis were liquid, gas and char. The experimental results showed that the degradation of HDPE mixed with PP in the ratio of 80:20 at 460 ºC and HDPE mixed with PP in the ratio of 60:40 at 460 ºC gave a large amount of liquid product. While pure HDPE gave the largest amount of liquid product at 460 ºC. For thermal degradation of HDPE mixed with PS in the ratio of 60: 40 and more will decreased the degradation temperature. When compare with the results analyzed by TGA shows the same results.