Abstract
Naphthol based epoxy resin containing naphthylene linkage (NANAE) was synthesized by the reaction of epichlorohydrin and naphthol oligomer which was obtained by polycondensation reaction of 1-naphthol and bischloromethyl naphthalene. In order to evaluate the effect of naphthalene structure introduced as the linkage moiety of epoxy resin on the thermal properties, naphthol based epoxy resin containing phenylene linkage (NAE) and phenol based one containing phenylene linkage (PAE) were used as references. Although the storage moduli of the cured polymers decreased in order of PAE>NAE>NANAE in the rubbery states, the cured polymer of NANAE gave the highest glass transition temperature of 183.1℃ in the DMA measurement. Coefficients of linear thermal expansion decreased in order of PAE>NAE>NANAE in the glassy states. These results may be attributed to higher content of rigid naphthalene moiety in NANAE.
