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Polymer Bulletin

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01-11-2013 | Original Paper

Kinetic effects of silica nanoparticles on thermal and radiation stability of polyolefins

Authors: Traian Zaharescu, Ilona Plesa, Silviu Jipa

Published in: Polymer Bulletin | Issue 11/2013

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Abstract

The effects of γ-irradiation as the accelerated degradation procedure were analyzed for the evaluation of material stability. Low density polyethylene, polypropylene and ethylene–propylene terpolymer were studied in formulations with SiO₂ nanoparticles (2 and 5 wt%) or as neat materials. High energy irradiation (up to 100 kGy) has revealed a faster increase in the absorption of carbonyl band in comparison with the corresponding change in hydroperoxide band. The three studied materials present increased oxidation rates as the received energy transferred from incidental rays is enhancing, because the thermal regime of degradation depends on the structural characteristics, namely initial number of tertiary carbon atoms and unsaturation level. The fate of hydroperoxides as oxidation initiators is discussed.

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Title: Kinetic effects of silica nanoparticles on thermal and radiation stability of polyolefins
Authors: Traian Zaharescu
Ilona Plesa
Silviu Jipa
Publication date: 01-11-2013
Publisher: Springer Berlin Heidelberg
Published in: Polymer Bulletin / Issue 11/2013
Print ISSN: 0170-0839
Electronic ISSN: 1436-2449
DOI: https://doi.org/10.1007/s00289-013-1001-5

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