Visible-Light-Sensitive Polymerizable and Polymeric Triazine-Based Photoinitiators with Enhanced Migration Stability

Photopolymerization has attracted great interest because of its mild reaction conditions, spatiotemporal controllability, cost efficiency, and fast speed. However, with the raising environmental awareness increasing attention to life health, leachability photoinitiators become a growing concern. In this research, methacrylate functionalized triazine-based polymerizable visible light photoinitiator, 2-(((4-(2-(4,6-bis(trichloromethyl)-1,3,5-triazin-2-yl)vinyl)phenoxy)carbonyl)amino)ethyl (CT) reversible addition–fragmentation chain transfer (RAFT) polymerized CT (pCT) were designed as polymeric photoinitiators, respectively. The photoinitiation abilities investigated triazine derivatives evaluated under violet LEDs. Due steric effect, pCT showed slightly reduced ability both LED at 400 nm 410 irradiation. Nevertheless, photopolymers initiated using excellent migration stability compared those prepared by 2-(4-methoxystyryl)-4,6-bis(trichloromethyl)-1,3,5-triazine (MT) 4-(2-(4,6-bis(trichloromethyl)-1,3,5-triazin-2-yl)vinyl)phenol (PT). Specifically, pCT-based polymers irradiation exhibited only 1/3-fold 1/14-fold leachability, while 1/2-fold 1/6-fold photoinitiator obtained MT-based photocured when nm. reveals potential applications in biomedical food packaging fields.