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Highly efficient sulfur-containing polymeric photoinitiators bearing side-chain benzophenone and coinitiator amine for photopolymerization

Paper ID Volume ID Publish Year Pages File Format Full-Text
28523 44079 2007 9 PDF Available
Title
Highly efficient sulfur-containing polymeric photoinitiators bearing side-chain benzophenone and coinitiator amine for photopolymerization
Abstract

Novel polymeric sulfur-containing photoinitiators bearing side-chain benzophenone and coinitiator amine, copolymers of 4-[(4-methacrylamido)thiophenyl]benzophenone (MAATPBP) and of 4-chloro-4′-[(4-methacrylamido)thiophenyl]benzophenone (CMAATPBP) with N,N-dimethylaminoethyl methacrylate (DMAEMA), as well as their hompolymers of poly(MAATPBP), poly(CMAATPBP) and poly(DMAEMA) were prepared and structurally characterized. The most commercially used photoinitiator BP and their corresponding low molecular weight combinations (MAATPBP/DMAEMA and CMAATPBP/DMAEMA) were selected as the reference to evaluate their photoefficiency. Polymeric photoinitiators display similar UV–vis maximal absorption spectra to the low molecular counterparts, which are greatly red-shifted in comparison with BP. Photopolymerization of difunctional 1,6-hexanediol diacrylate (HDDA) and trifunctional trimethylolpropane triacrylate (TMPTA) were studied by photo-DSC to investigate the photoefficiency of the copolymers, homopolymers and the combination of their homopolymers. The results show surprising high efficiency of the two copolymeric photoinitiators and their homopolymeric combinations. Poly(MAATPBP) and poly(CMAATPBP) can also efficiently initiate the photopolymerization without the coinitiator because of the photolysis at C–S bond. Their activity data obtained are discussed and related to the structural requirements of the above systems.

Keywords
Polymeric photoinitiator; Photopolymerization; Sulfur-containing initiator; Benzophenone
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Highly efficient sulfur-containing polymeric photoinitiators bearing side-chain benzophenone and coinitiator amine for photopolymerization
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Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Photochemistry and Photobiology A: Chemistry - Volume 186, Issue 1, 5 February 2007, Pages 106–114
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
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Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
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Any Questions? feel free to contact us