UV curing kinetic of high performance epoxy resin for Roll-to-Roll UV embossing

In present work curing kinetics of UV-initiated cationic photo-polymerization of EPICLON series epoxy resin HP-820 and key cure process parameters, such as the extent of cross-linking and conversion, polymerization rate and the order of reactions have been studied by Photo-Differential Scanning Calorimetry (DPC). Different kinetics analysis results, including enthalpy of the reaction, induction time, peak maximum, percentage conversion were obtained for studied epoxy system at different isothermal temperatures (30-70°C), allowing calculating activation energy. Two kinetic parameters - coefficient rate (k) and the order of the initiating reaction (m) were determined, using an autocatalytic kinetics model.