Preparation of a hybrid photopolymer for stereolithography

摘要

New free radical-cationic hybrid photopolymer, consisting of acrylate-based and epoxy-based photosensitive resin for stereolithography was prepared. The influence of the initiator sort and amount on the curing degree of the photopolymer was investigated. Photopolymerization process, degradation temperature, dynamic mechanical thermal properties of the Interpenetrating polymer networks (IPNs) formed are characterized by using FTIR spectroscopy, TG and DMA. The results indicate curing reaction is reacting sufficiently and all performance is better when the ratio of acrylate/epoxy resin is 1:0.75. And post-curing could also improve properties of hybrid resin after UV curing.