The Cure and Rheological Behavior of Diglycidyl Ether of Bisphenol F /Nadic Methyl Anhydride Resin System for Liquid Encapsulant

액상봉지재용 Diglycidyl Ether of Bisphenol F/Nadic Methyl Anhydride 수치 시스템의 경화 및 유변학적 거동

The cure and rheological behavior of Diglycidyl ether of bisphenol F, catalyzed by four kinds of imidazoles and a Nadic methyl anhydride curing agent were studied using a differential scanning calorimeter (DSC) and rheometer. The isothermal traces were employed to analyze cure reaction. The DGEBF/anhydride conversion profiles showed autocatalyzed reaction characterized by maximum conversion rate at 20~40 % of the reaction. The rate constants obtained from isothermal test showed temperature dependance, but reaction order did not. The order of reaction (m+n) was calculated to be close to 3. The measurements of viscosity and relation time in the presence of inorganic fillers were carried out at different isothermal curing temperatures. The viscosity and gelation time increased with filler content at the same isothermal temperature.