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Chem. J. Chinese Universities ›› 2012, Vol. 33 ›› Issue (03): 640.doi: 10.3969/j.issn.0251-0790.2012.03.039

• Polymer Chemistry • Previous Articles     Next Articles

Photopolymerization Kinetics of Acrylate/Liquid Crystal Mixtures Initiated by Ketocoumarin/Amine/Triazine Ternary Photoinitiator

PENG Hai-Yan1, BI Shu-Guang1, LIAO Yong-Gui1, ZHOU Xing-Ping1, XIE Xiao-Lin1,2   

  1. 1. School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan 430074, China;
    2. National Anti-counterfeit Engineering Research Center, Huazhong University of Science and Technology, Wuhan 430074, China
  • Received:2011-03-28 Online:2012-03-10 Published:2012-03-10

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Abstract:

The photopolymerization kinetics of acrylate/liquid crystal(LC) mixtures photoinitiated by 3,3'-carbonyl bis(7-diethylaminocoumarin)(KCD)/N-methyl-N,N-diethanolamine(MDEA)/2-(4-methoxy-phe-nyl)-4,6-bis(trichloromethyl)-1,3,5-triazine(TA) was studied by photo-differential scanning calorimetry equipped with 441.6 nm filters. The results indicate that adding TA into KCD/MDEA binary photoinitiator greatly increases the maximum rate of photopolymerization Rp(max) and monomer conversion. Rp(max) and the total monomer conversion increase respectively by 100% and 69% as the content of TA is 0.5%(mass fraction). Moreover, both Rp(max) and total monomer conversion increase by 2.5 and 2.8 times separately when the light intensity rises from 1.5 mW/cm+2 to 35.2 mW/cm+2.

Key words: Polymer dispersed liquid crystals, Visible light initiator, Photopolymerization kinetics

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