The photoinitiating system composed of 1-ethyl-3'-methylthiacyanine bro-mide (C-I), 2-chlorohexaarylbiimidazole (o-Cl-HABI) and 3-mercapto-4-methyl-4H-1, 2, 4-triazole (MTA), which act as sensitizer, initiator and...The photoinitiating system composed of 1-ethyl-3'-methylthiacyanine bro-mide (C-I), 2-chlorohexaarylbiimidazole (o-Cl-HABI) and 3-mercapto-4-methyl-4H-1, 2, 4-triazole (MTA), which act as sensitizer, initiator and hydrogen-donor respectively, can beused to initiate the polymerization of methyl methacrylate (MMA). The kinetic study wascarried out in trichloromathane solution at 30℃ by using dilatometry. The relation be-tween the polymerization rate and the concentrations of C-I, o-Cl-HABI, MTA and MMAwas studied.展开更多
The present paper is reporting for the first time that poly(pentene-2 sulfone) films containing a photosensitive agent is a good electron beam recording material for real time acoustics.
Kinetic studies on the near-UV photo-initiating polymerization of methylmethacrylate (MMA) sensitized by dye/hexaarylbiimidazole systems were carried out. When exposed to high-pressure mercury lamp (filtered by Pyrex ...Kinetic studies on the near-UV photo-initiating polymerization of methylmethacrylate (MMA) sensitized by dye/hexaarylbiimidazole systems were carried out. When exposed to high-pressure mercury lamp (filtered by Pyrex glass), dye/hexaarylbiimidazole system undergoes quick electron transfer and free radicals are produced. RSH, as hydrogen donor, can improve the polymerization efficiency of MMA. Comparisons of influence of different dyes and different RSH on the conversion of MMA photopolymerization were carried out. Excellent results have been obtained in photoimaging studies, e.g. a minimum exposure energy of the photosensitive systems of 8 mJ/cm2 can be reached and the resolution of presensitized printing plate was ca. 10 μm.展开更多
基金Project 59573009 is supported by the National Natural Science Foundation of China.
文摘The photoinitiating system composed of 1-ethyl-3'-methylthiacyanine bro-mide (C-I), 2-chlorohexaarylbiimidazole (o-Cl-HABI) and 3-mercapto-4-methyl-4H-1, 2, 4-triazole (MTA), which act as sensitizer, initiator and hydrogen-donor respectively, can beused to initiate the polymerization of methyl methacrylate (MMA). The kinetic study wascarried out in trichloromathane solution at 30℃ by using dilatometry. The relation be-tween the polymerization rate and the concentrations of C-I, o-Cl-HABI, MTA and MMAwas studied.
文摘The present paper is reporting for the first time that poly(pentene-2 sulfone) films containing a photosensitive agent is a good electron beam recording material for real time acoustics.
基金Project supported by the National Natural Science Foundation of China (NO. 59973023).
文摘Kinetic studies on the near-UV photo-initiating polymerization of methylmethacrylate (MMA) sensitized by dye/hexaarylbiimidazole systems were carried out. When exposed to high-pressure mercury lamp (filtered by Pyrex glass), dye/hexaarylbiimidazole system undergoes quick electron transfer and free radicals are produced. RSH, as hydrogen donor, can improve the polymerization efficiency of MMA. Comparisons of influence of different dyes and different RSH on the conversion of MMA photopolymerization were carried out. Excellent results have been obtained in photoimaging studies, e.g. a minimum exposure energy of the photosensitive systems of 8 mJ/cm2 can be reached and the resolution of presensitized printing plate was ca. 10 μm.
