Polymer Engineering and Science, Vol.46, No.4, 474-479, 2006
Synthesis of a novel hexaarylbiimidazole with ether groups and characterization of its photoinitiation properties for acrylate derivatives
A novel photoinitiator 2,2'-bis-(2-chlorophenyl)-4,4',5,5'tetra-[3-(2-hydroxylmethyl-2-triethyl ene glycol monoethylene ether-ethane-l-oxy)-phenyl]-1,2'-biimidazole (BCTE-HABI) was synthesized from 3,3'-dimethoxy benzoin. Ultraviolet spectra, fluorescence spectra, ESR, photodilatometer, and photo-DSC measurements indicate that its photoinitiating activity for acrylate derivatives is better than 2,2'-bis-(2-chlorophenyl)-4,4',5,5' tetraphenyl-1,2'-biimidazole (o-Cl-HABI), which is one of the most widely studied and used derivatives of HABI.