Abstract
In this study, we report a novel method for selective synthesis of naphthylene ether trimers by condensation of 2,7-dihydroxynaphthalenes in the presence of neutral alkaline metal salt under acidic condition. We prepared an epoxy resin from the trimers and examined properties of the cured epoxy resin. As a result, the cured resin showed not only good physical thermostability, such as high glass transition temperature and low thermal expansion coefficient, but also good chemical thermostability like high thermal decomposition temperature. Additionally, low moisture absorption of the cured resin was also confirmed. From these results, the novel epoxy resin with naphthylene ether skeletons is considered to be suitable for advanced applications such as high-tech electronics parts.
