THE KINETIC OF THERMAL DEGRADATION FOR MANUFACTURED HIGH DENSITY POLYETHYLENE (HDPE).

Abstract

The goal of this study is to know how effected the manufactured high density polyethylene ( HDPE) bag during reprocessing with various temperatures and various times. The isothermal weight loss (X%) of manufactured high density polyethylene was investigated at temperature 150, 175, 200, 225 and 250 oC at period of times (10 – 50 min.). The result was the amount of weight loss (X%) of manufactured (HDPE) increases with increasing temperature and time. Calculation of the activation energy of the thermal weight loss process from these experiments was calculated and it was changed between (22-29 kJ/mol) at changing temperatures between ( 150 – 250 oC ) for range 2-6% of weight loss of (HDPE). The rate of reaction constant (K) for temperatures range (150 – 250 oC ) was changed from ( 1E-06 - 6E-06 L.mol-1.S-1 ). The degree of reaction was found 2nd order reaction in all range of temperature (150 – 250 oC).