Accelerating effect of poly(methyl methacrylate) on rubber oxidation, Part 1: A chemiluminescence study

Broska, Rastislav, Billingham, Norman C and Fearon, Peter K (2008) Accelerating effect of poly(methyl methacrylate) on rubber oxidation, Part 1: A chemiluminescence study. Polymer Degradation and Stability, 93 (6). pp. 1100-1108. ISSN 0141-3910

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Abstract

The oxidative stability of blends of poly(methyl methacrylate) (PMMA) with four types of rubber, poly(ethylene-stat-propylene-stat-5-methylene-2-norbornene) (EPDM), poly(ethylene-stat-vinyl acetate) (EVA), dicarboxy terminated poly(acrylonitrile-stat-butadiene) (NBR) and poly(1,3-butadiene-stat-styrene) (SBR), has been investigated as models for rubber-toughened PMMA. Chemiluminescence was used to monitor the oxidation of the rubber in the blends, revealing an unexpected accelerating effect of PMMA on the oxidation of all the rubbers investigated. The effect varies according to the type of rubber and the temperature. The thermo-oxidative stability of PMMA has also been found to decrease in the presence of the rubber as proved by thermogravimetry, confirming mutually antagonistic effects of PMMA and rubber in the blend oxidation. On the basis of results from all techniques, including identification of oxidation products by FTIR spectroscopy, a possible mechanism is suggested, involving the formation of mobile radicals in PMMA induced by rubber oxidation. These radicals are suggested to play a crucial role in enhancing rubber phase oxidation.

Item Type: Article
Schools and Departments: School of Life Sciences > Chemistry
Depositing User: Norman Billingham
Date Deposited: 06 Feb 2012 21:14
Last Modified: 23 Jul 2013 12:29
URI: http://sro.sussex.ac.uk/id/eprint/30370
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