Science Arts & Métiers (SAM) Epoxidized linseed oils based networks. Case of thermal degradation

Epoxidized linseed oils based networks. case of thermal degradation.

Emmanuel Richaud (1) , Alain Guinault (1) , Sarah Baiz (1) , Fidèle Nizeyimana (2)

1 PIMM - Laboratoire Procédés et Ingénierie en Mécanique et Matériaux
2 Orano

This is an author-deposited version published in: https://sam.ensam.eu The thermal oxidation of networks based on epoxidized linseed oil cured with an anhydride hardener was studied in the 120e200 C range by means of FTIR spectroscopy and gravimetry. Systems with 1-1 and 1e0.6 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.

Mots clés: Thermal ageing; Stoichiometry; Anhydride; Epoxidized linseed oils

Domaines: Polymères

Emmanuel Richaud, Alain Guinault, Sarah Baiz, Fidèle Nizeyimana. Science Arts & Métiers (SAM) Epoxidized linseed oils based networks. Case of thermal degradation. Polymer Degradation and Stability, 2019, 166, pp.121-134. ⟨10.1016/j.polymdegradstab.2019.05.018⟩. ⟨hal-02189559⟩