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The Effect of γ-Irradiation on the Structure and Properties of Poly(propylene)/Clay Nanocomposites

✍ Scribed by Naima Touati; Mustapha Kaci; Hania Ahouari; Stéphane Bruzaud; Yves Grohens

Publisher
John Wiley and Sons
Year
2007
Tongue
English
Weight
258 KB
Volume
292
Category
Article
ISSN
1438-7492

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✦ Synopsis

Abstract

The oxidative degradation of PP/OMMT nanocomposites under γ‐irradiation was studied. Changes in structure and properties resulting from γ‐exposure in the range 0–100 kGy were investigated. The results were analyzed by comparing the influence of PP__‐g‐MA and pristine OMMT on the oxidation kinetics of neat PP. γ‐Irradiation in the presence of air strongly degraded the properties of PP materials, particularly for radiation doses above 20 kGy. The rate of oxidative degradation of PP/OMMT/PP‐g‐MA nanocomposites was much faster than that of neat PP. This suggests that PP‐g‐__MA and pristine OMMT components behave as oxidation catalysts, leading to the formation of free radicals in the polymer matrix.

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