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Epoxidized linseed oils based networks. case of thermal degradation.

Article dans une revue avec comité de lecture
Author
GUINAULT, Alain
BAIZ, Sarah
NIZEYIMANA, Fidèle
531688 Orano
ccRICHAUD, Emmanuel
86289 Laboratoire Procédés et Ingénierie en Mécanique et Matériaux [PIMM]

URI
http://hdl.handle.net/10985/15877
DOI
10.1016/j.polymdegradstab.2019.05.018
Date
2019
Journal
Polymer Degradation and Stability

Abstract

The thermal oxidation of networks based on epoxidized linseed oil cured with an anhydride hardener was studied in the 120–200 °C range by means of FTIR spectroscopy and gravimetry. Systems with 1-1 and 1–0.6 epoxy/anhydride stoichiometry were compared. The ageing tests monitored on thin films revealed that non-stoichiometric systems would be intrinsically more oxidizable than stoichiometric ones because of a higher concentration in reactive sites but stoichiometric system displays paradoxically higher levels of mass loss because those later originate from methyl cyclohexane hardener group. In the case of thick samples, the differences in oxygen diffusivity for both systems induce that oxidized layer would be slightly thicker in non-stoichiometric system than in stoichiometric ones would lead to lower in non-stoichiometric systems compared to stoichiometric ones.

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