2011 Volume 32 Issue 3 Pages 122-129
SynopsisModel reactions were carried out using coniferyl alcohol (CA) which was one of the unit structures for lignin(L). Firstly, an epoxidized CA (ECA) was synthesized by reaction of CA with epichlorohydrin. The 1H-NMR spectrum showed that not only the phenolic hydroxyl groups but also the alcoholic hydroxyl groups were epoxidized. And then, it was confi rmed that epoxy groups of ECA could react with hydroxyl groups of CA according to expectation. From above mentioned model reactions, the possibility of the cured epoxy resin based on about 100% biomass was suggested. After the confi rmation of the reactivity of hydroxyl group of CA with epoxy group of phenyl glycidyl ether (PGE), the curing reaction of epoxy resins using bisphenol A diglycidyl ether (DGEBA), by L was examined. The cured epoxy resins showed the glass transition temperature of around 151℃ which was 20℃ higher than that of the conventional DGEBA cured by petrochemical phenol novolac and the residue after heating at 500℃ by thermo gravimetric analysis was also 10% increased.(Received December 9, 2010 ; Accepted January 25, 2011)
