Functionalized green tea tannins as phenolic prepolymers forbio-based epoxy resins

Sofia Benyahya (1) , Chahinaz Aouf (2) , Sylvain Caillol (1) , Bernard Boutevin (1) , Jean-Pierre Pascault (3) , Hélène Fulcrand (2)

1 ICGM ICMMM - Institut Charles Gerhardt Montpellier - Institut de Chimie Moléculaire et des Matériaux de Montpellier
2 SPO - Sciences Pour l'Oenologie
3 IMP - Ingénierie des Matériaux Polymères

Phenolic extract from the green tea leaves was used for the production of thermoset epoxy resins. The commercial green tea extract (GTE) was functionalized by the reaction with epichlorohydrin in the presence of phase transfer catalyst. The glycidyl ether derivative of the green tea extract (GEGTE) obtained with a good yield was cured in epoxy polymer with isophorone diamine (IPD) and the resulting network was compared to catechin-IPD and diglycidyl ether of bisphenol A (DGEBA-IPD) systems. The thermal and mechanical analyses of this bio-based epoxy polymer showed its high reactivity associated with a high crosslinking density (T-g: 140-190 degrees C), a high thermal resistance and interesting mechanical properties.

Mots clés: Green tea tannins; Phenolic compounds; Bio-based epoxy resin; Differential scanning calorimetry (DSC); Thermogravimetric analysis; Dynamic mechanical analysis (DMA)

Mots clés: (TGA)

Domaines: Polymères

Sofia Benyahya, Chahinaz Aouf, Sylvain Caillol, Bernard Boutevin, Jean-Pierre Pascault, et al.. Functionalized green tea tannins as phenolic prepolymers forbio-based epoxy resins. Industrial Crops and Products, 2014, 53, pp.296-307. ⟨10.1016/j.indcrop.2013.12.045⟩. ⟨hal-00934260⟩