Abstract
The long-wavelength sensitive photoinitiating system composed of 3-n-propylsulfonic acid -2-[5-(3-n-propylsulfonic acid triethylamine-2-benzothiazolinylidene)-1, 3-pentadienyl]-benzoxazolium inner salt (SP-36), 2-chlorohexaarylbiimidazole (o-cl-HABI) and 3-mercapto-4-methyl-4H-1, 2, 4, -triazole(MTA), which acted as sensitizer, initiator and hydrogen-donor respectively, can be used to initiate the polymerization of methyl methacrylate (MMA). The kinetic study was carried out in trichloromathane solution at 30°C by using dilatometer. The relation between the polymerization rate and the concentrations of SP-36, o-cl-HABI, MTA and MMA was studied. The kinetic formula was deduced:Rp=K[SP-36]0.45[HABI]0.40[MTA]0.24[MMA]1.0. The photopolymer system can record stable hologram under Helium neon laser.
