Identification of photoluminescence features of an epoxy resin based on components features and curing effects

Olivier Gallot-Lavallée (1) , G. Teyssedre (2) , C. Laurent (2) , S. Rowe (3)

1 G2ELab - Laboratoire de Génie Electrique de Grenoble
2 LGET - Laboratoire de génie électrique de Toulouse
3 Schneider Electric Industries S.A.S.

Photoluminescence features in a commercial grade cured DGEBA-based epoxy resin have been investigated with as objective to determine which of the material compounds are responsible for cured resin emissions. The origin of the bands has been approached by considering photoluminescence of base resin and hardener taken separately, of their mixture, and in the course of curing. Most of the bands observed in the cured resin could be interpreted based on those found in the components taken separately. Fluorescence of the cured resin appears dominated by two broad bands that are characteristic of the hardener and exhibits a blue shift by up to 30nm in the course of curing which could be used for cure monitoring purpose of the investigated system. Fluorescence of the base resin is clearly detected in the resin cured with tertiary amine as catalyzer. However, it is very weak if the catalyzer is not added. Two phosphorescence processes have been isolated in the cured resin, one of them being related to the base resin. Finally, a chemiluminescence spectrum has been recorded in the course of curing, which has been related to either curing-related reactions or to an oxidation process

Mots clés: Photoluminescence; Curing; Epoxy resin

Domaines: Autre

Olivier Gallot-Lavallée, G. Teyssedre, C. Laurent, S. Rowe. Identification of photoluminescence features of an epoxy resin based on components features and curing effects. Polymer, 2005, 46, pp.2722-2731. ⟨10.1016/j.polymer.2005.02.003⟩. ⟨hal-00019787⟩