Photostabilisation of the "wood-clearcoatings" systems with UV absorbers: correlation with their effect on the glass transition temperature

Foued Aloui (1) , Abdelaziz Ahajji (1) , Youcef Irmouli (1) , Béatrice George (1) , Bertrand Charrier (2) , André A. Merlin (1)

1 LERMAB - Laboratoire d’Etude et de Recherche sur le Matériau Bois
2 Département de Science et Génie des Matériaux

In an application-oriented study, the effective transition temperature Tg of organic wood-clearcoatings between a hard, glassy state and a viscoelastic and rubbery state is measured. The value of Tg is important in the eventual development of cracks and a thermomechanical analysis is used to study the photostabilisation performance of some UV absorbers. A weathering exposure test suggests that certain organic UV absorbers have quite a low Tg and may inhibit the crack formation, in contrast with inorganic UV absorbers.

Mots clés: ABSORBEUR UV

Domaines: Ingénierie des aliments; Génie des procédés; Sciences du Vivant [q-bio]

Foued Aloui, Abdelaziz Ahajji, Youcef Irmouli, Béatrice George, Bertrand Charrier, et al.. Photostabilisation of the "wood-clearcoatings" systems with UV absorbers: correlation with their effect on the glass transition temperature. Journal of Physics: Conference Series, 2006, 40, pp.118-123. ⟨10.1088/1742-6596/40/1/015⟩. ⟨hal-02660946⟩