Synthesis and characterization of hyperbranched-poly(siloxysilane)-based polymeric photoinitiators

Three UV‐sensitive, hyperbranched‐poly(siloxysilane)‐based polymeric photoinitiators, bearing an alkyl phenone moiety linked to the surface of the hyperbranched polymer, were synthesized via the hydrosilylation of hyperbranched poly(siloxysilane) and modified UV‐sensitive compounds. Hyperbranched po...

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Published in:Journal of polymer science. Part A, Polymer chemistry Polymer chemistry, 2006-05, Vol.44 (10), p.3261-3270
Main Authors: Si, Qing-Fa, Fan, Xiao-Dong, Liu, Yu-Yang, Kong, Jie, Wang, Sheng-Jie, Qiao, Wen-Qiang
Format: Article
Language:English
Subjects:
Applied sciences
Exact sciences and technology
hyperbranched
Physicochemistry of polymers
poly(siloxysilane)
polymeric photoinitiators
Polymerization
Polymers and radiations
polysiloxane
UV-sensitive
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Summary:Three UV‐sensitive, hyperbranched‐poly(siloxysilane)‐based polymeric photoinitiators, bearing an alkyl phenone moiety linked to the surface of the hyperbranched polymer, were synthesized via the hydrosilylation of hyperbranched poly(siloxysilane) and modified UV‐sensitive compounds. Hyperbranched poly(siloxysilane) was prepared via the polyhydrosilylation of the AB2‐type monomer methylvinyldichlorosilane. The chemical structures of the polymeric photoinitiators were characterized with 1H, 13C, and 29Si NMR, elemental analysis, Fourier transform infrared, differential scanning calorimetry, UV spectrophotometry, and thermogravimetric analysis. The UV‐curing behaviors of the blends of the hyperbranched polymeric photoinitiators with UV‐curable epoxy acrylate (EA) resin were determined by Fourier transform infrared, and the results showed that the initiation efficiency of the polymeric photoinitiators was excellent and that the thermostability of the EA/polymeric photoinitiator curing systems was higher than that of the EA/photoinitiators. © 2006 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 44: 3261–3270, 2006 Hyperbranched‐poly(siloxysilane)‐based macrophotoinitiators were obtained via the hydrosilylation of the hyperbranched polymer with SiH end groups and modified photoinitiators. The UV efficiency was investigated for blends of the macrophotoinitiators with UV‐curable epoxy acrylate resin.
ISSN:0887-624X
1099-0518
DOI:10.1002/pola.21439