Journal
POLYMER
Volume 50, Issue 16, Pages 3917-3923Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.polymer.2009.06.065
Keywords
Hyperbranched polymeric photoinitiator; Thioxanthone; Amphipathic
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Funding
- National Natural Science Foundation of China [50803036]
- Science & Technology Commission of Shanghai Municipal Government [08520704700, 06JC14041]
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Amphipathic hyperbranched polymeric thioxanthone (TX) photoinitiators (AHMs) were synthesized by introducing TX, and polyethylene glycol monoethylether glycidyl ether (E-PEO), which contained short poly (ethylene oxide) (PEO) chain, into periphery of hyperbranched poly(ethylene imine) (HPEI), as well as low-molecular weight analogue 2-(2-hydroxy-3-(methyl(2,3,4,5,6-pentahydroxyhexyl)amino)propoxy) thioxanthone (MGA-TX). AHPTXs possess UV-vis absorption spectra similar to TX derivatives, and weaker fluorescence emission in comparison to low-molecular weight analogues. AHPTXs can be not only dispersed easily in many solvents and acrylate monomers, but also are soluble in water. AHPTXs are very efficient in photopolymerization of acrylamide (AM), poly(ethylene glycol) diacrylate (PEGDA) and 2,2bis[4-(acryloxypolyethoxy)phenyl] propane (A-BPE-10). In comparison to low-molecular weight analogues photoinitiator systems 2-(2,3-epoxypropyloxy) thioxanthone/triethylamine (ETX/TEA) and MGA-TX/TEA, AHPTX1 is very efficient for photoinitiation of A-BPE-10 and AM in aqueous solution (C) 2009 Elsevier Ltd. All rights reserved.
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