Thermal degradation of high density polyethylene in a reactive extruder

Wallis, Michael D. ; Bhatia, Suresh K. (2007) Thermal degradation of high density polyethylene in a reactive extruder Polymer Degradation and Stability, 92 (9). pp. 1721-1729. ISSN 0141-3910

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Official URL: http://linkinghub.elsevier.com/retrieve/pii/S01413...

Related URL: http://dx.doi.org/10.1016/j.polymdegradstab.2007.06.002

Abstract

The thermal degradation of high density polyethylene was conducted in a reactive extruder at various screw speeds with reaction temperatures of 400 °C and 425 °C. The residence time of the extruder was estimated and the molecular weight distribution of the fed plastic and reaction products was analysed using gel permeation chromatography. A continuous kinetic model was used to describe the degradation of the high density polyethylene in the reactive extruder. The breakage kernel and the scission rate model parameters were estimated from the experimental data for a variety of cases. It was found that purely random breakage and a scission rate which had a power law dependence on molecular size of 0.474 best described the experimental data.

Item Type:Article
Source:Copyright of this article belongs to Elsevier Science.
Keywords:HDPE; Thermal Degradation; Reactive Extruder; Continuous Kinetics
ID Code:2908
Deposited On:09 Oct 2010 05:39
Last Modified:17 May 2011 05:42

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