Photopolymerization Kinetics of 2,2'-diomethoxyphenyl- 4,4',5,5'-tetraphenyl-1,2'-diphenylimidazole Photoinitiator System

doi:10.7517/j.issn.1674-0475.2012.03.210

Abstract

Abstract: The photopolymerization kinetics of 2,2'-diomethoxyphenyl-4,4',5,5'-tetraphenyl-1,2'-diphenylimidazole (BMOIM) was investigated in this study. The UV absorption spectra of photoinitiator, hydrogendonor and photosensitizer were analysized by UV spectrometer. Real time infrared spectroscopy (RT-IR) was used to investigate the influence of different light intensity, different functionality monomer system and photoinitiator concentration on polymerization kinetics. The results showed that the double bond conversion could reach to 96% in 20 s, when the concentration of photoinitiator was 0.6%. The rate of polymerization increased with increase of the initiator concentration. The final double bond conversion and polymerization rate increased with increase of light intensity. The final double bond conversion of bifunctional monomer was higher than that of trifunctional monomer.

Key words: photoinitiator, photopolymerization, kinetics, RT-IR

CLC Number:

CHEN Jie, WANG Ke-min, LU Jian, JIANG Shan, NIE Jun, MA Gui-ping, QIAN Xiao-chun. Photopolymerization Kinetics of 2,2'-diomethoxyphenyl- 4,4',5,5'-tetraphenyl-1,2'-diphenylimidazole Photoinitiator System[J]. Imaging Science and Photochemistry, 2012, 30(3): 210-215.

References

[1] 魏杰, 金养智. 光固化涂料[M]. 北京: 化学工业出版社, 2005. Wei J, Jin Y Z. UV-Curable Coatings[M]. Beijing: Chemical Industry Press, 2005.
[2] Silva A S, Andre C, Castanheira I, et al.Study of the migration of photoinitiators used in printed food-packaging materials into food simulants[J]. Journal of Agricultural and Food Chemistry, 2009, 57(20): 9516-9523.
[3] Roberto S B. Use of radiation in biomaterials science[J]. Nuclear Instruments and Methods in Physic Research B, 2002, 191(1-4): 752-757.
[4] 聂俊, 何勇, 等. 紫外阳离子光固化研究进展[J]. 涂料技术与文摘, 2007, 28(10): 1-9. Nie J, He Y, et al. Progress in cationic UV-curable[J]. Coatings Technology and Abstract, 2007, 28(10): 1-9.
[5] He H Y, Li L, James L. Photopolymerization and structure formation of methacrylic acid based hydrogels in water/ethanol mixture[J]. Polymer, 2006, 47(5): 1612-1617.
[6] 魏无际, 郑耀臣. 光固化涂料用光引发剂的进展[J]. 涂料工业, 2002, 32(1): 31-35. Wei W J, Zheng Y C. Process in photoinitiators for UV-curable coatings[J]. Paint and Coatings Industry, 2002, 32(1): 31-35.
[7] Xu J, Ma G P, Wang K M, et al. Synthesis and photopolymerization kinetics of oxime ester photoinitiators[J]. Journal of Applied Polymer Science, 2012, 123(2): 725-731.
[8] 朱俊飞,等. 光引发剂的研究现状及进展[J]. 涂料工业, 2010, 40(5): 74-79. Zhu J F, et al. Research status and progress of photoinitiator[J]. Paint and Coatings Industry, 2010, 40(5): 74-79.
[9] 史素青, 吴刚强, 肖浦, 等. 一种可聚合光引发体系及其性能研究[J]. 高分子学报, 2007, 9: 857-861. Shi S Q, Wu G Q, Xiao P, et al. A polymerizable photoinitiating system and its performance[J]. Acta Poly-merica Sinica, 2007, 9: 857-861.
[10] 聂俊, 肖鸣, 等. 光聚合技术与应用[M]. 北京: 化学工业出版社, 2003. Nie J, Xiao M, et al. Photopolymerization Technology and Application[M]. Beijing: Chemical Industry press, 2008.
[11] 姜苹, 王克敏, 聂俊, 等. 2,4-双(三氯甲基)-6-(4-甲氧基-1-苯乙烯基)-S-三嗪光引发剂的合成与聚合动力学研究[J]. 影像科学与光化学, 2011, 29(3): 222-231. Jiang P, Wang K M, Nie J, et al. Synthesis and photopolymerization kinetics of 2,4-bis(trichloromethyl)-6-(4-methoxy-1- styryl)-s-triazine[J]. Imaging Science and Photochemistry, 2011,29(3): 222-231.
[12] 路健, 宋国强, 王克敏, 等. 2-(4-甲氧基苯基)-4, 6-双(三氯甲基)-S -三嗪光引发剂的合成及其聚合动力学性能研究[J].影像科学与光化学, 2011, 29(2): 99-107. Lu J, Song G Q, Wang K M, et al. Synthesis and photopolymerization kinetics of 2-(4-methoxypheny)-4,6-bis (trichloromethyl)-S-triazine photoinitiator[J]. Imaging Science and Photochemistry, 2011,29(2): 99-107.
[13] 王永祯, 王爱玲, 许并社. 光固化成型材料中光引发剂对固化性能的影响研究[J]. 材料热处理学报, 2007, 28(z1): 314-318. Wang Y Z, Wang A L, Xu B S. Study on the influence of photoinitiator on the solidify performance of molding materials by UV[J]. Transactions of Materials and Heat Treatment, 2007, 28(z1): 314-318.
[14] 吕建波. 紫外光固化涂料的氧阻聚效应[J]. 电镀与涂饰, 2010, 29(1): 64-68. Lü J B. Oxygen inhibition of polymerization for ultraviolet-curable coatings[J]. Electroplating and Finishing, 2010, 29(1): 64-68.
[15] 聂俊, 杨冬芝, 张静. 三官能度甲基丙烯酰氧基单体的合成与性能研究[J].影像科学与光科学, 2008, 26(5): 403-409. Nie J, Yang D Z, Zhang J. Synthesis and characterization of trifunctional methacryloyloxy monomers[J]. Imaging Science and Photochemistry, 2008, 26(5): 403-409.