Evaluation of the oxidation beavior of polyethylene geomembranes using oxidative induction time tests

摘要

The oxidation of five different high density polyethylene (HDPE) geomembranes was produced in a forced air oven at a temperature of 115 deg C. The antioxidant packages of three of the geomebranes contained hindered phenols and phosphites types of antioxidants. The antioxidant packages of the other two geomembranes consisted of either thiosynergists or hindered amines together with hindered phenols and phsphites. The consumption of antioxidants after given time poriods of oven incubation was monitored by two oxidative induction time (OIT) tests: standard OIT and high pressure OIT together with tensile tests.