Title

Predicting the depletion of antioxidants in high density polyethylene (HDPE) under sunlight using the reciprocity law

Document Type

Article

Publication Date

4-1-2020

Subject Area

ARRAY(0x557a93fcc888)

Abstract

Depletion of antioxidants in HDPE subjected to sunlight exposure was studied. Sunlight radiation was simulated using a laboratory xenon light weatherometer at three irradiation levels. Oxidative induction time (OIT) test was performed on different layers along the thickness of the test coupons to establish the antioxidant depletion throughout the exposure duration. The highest drop in OIT was obtained for the surface layer facing the radiation, followed by the backside layer which was exposed to indirect radiation reflected from the wall of the weatherometer. The core section showed a slower decrease under the same exposure conditions. Furthermore, the OIT depletion rate in the surface layer increased with radiation intensity. The study proved that the sunlight degradation of the tested polyethylene can be accelerated by increasing the irradiation intensity based on the reciprocity law.

Publication Title

Geotextiles and Geomembranes

Volume

48

Issue

2

First Page

170

Last Page

175

Digital Object Identifier (DOI)

10.1016/j.geotexmem.2019.11.009

ISSN

02661144

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