Photocuring Kinetic Studies of TMPTMA Monomer by Type II Photoinitiators of Different Weight Ratios of 2-Chlorohexaaryl Biimidazole (o-Cl-HABI) and N-Phenylglycine (NPG)

摘要

The curing behavior of the type II photoinitiator package based on different weight ratios of o-Cl-HABI (hydrogen acceptor)/NPG (hydrogen donor) systems (where o-Cl-HABI is a 2-chlorohexaaryl biimidazole, NPG is an N-phenylglycine) was investigated through FT-IR, gel-fraction, electron spin resonance (ESR) and photoluminescence (PL) methodologies. As the amount of NPG increasing, the faster curing speed occurred. However, the curvature photo-reactivity phenomenon was observed as the amount of o-Cl-HABI at 0.5, 1 and 2 wt%, respectively. In addition, the radical transfer mechanism in the presence of air and nitrogen atmospheres was also discussed in this study.