Thermal and radio-oxidation of epoxy coatings

C Galant (1, 2) , Bruno Fayolle (2, 3) , Matthias Kuntz (4, 1) , Jacques Verdu (3, 2)

1 EDF R&D - EDF R&D
2 PIMM - Laboratoire Procédés et Ingénierie en Mécanique et Matériaux
3 LIM - Laboratoire d'Ingénierie des Matériaux
4 PDC - Plastes et différenciation cellulaire

Degradation induced by thermal (50-110 °C) and radio-oxidation of low T g epoxy-amine networks has been studied. It has been found that oxidation leads mainly to amide groups formation at the vicinity of tertiary amines whatever ageing conditions (thermal or radio-oxidation at 200 Gy h -1 ). In addition, some species as acids, peracids or formates have been revealed indicating a chain scission process. Physical modifications as T g decrease and soluble fraction increase due to chain scission process, have been correlated with chemical modifications.

Mots clés: Chain scission; Epoxy coatings; Glass transition; Oxidation

Domaines: Matériaux

C Galant, Bruno Fayolle, Matthias Kuntz, Jacques Verdu. Thermal and radio-oxidation of epoxy coatings. Progress in Organic Coatings, 2010, 69 (4), pp.322-329. ⟨10.1016/j.porgcoat.2010.07.005⟩. ⟨hal-02458293⟩