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Polymeric Photoinitiator (polymeric + photoinitiator)

Distribution by Scientific Domains
Polymers and Materials Science100%

Selected Abstracts

Poly(ethylene glycol)-thioxanthone prepared by Diels,Alder click chemistry as one-component polymeric photoinitiator for aqueous free-radical polymerization

JOURNAL OF POLYMER SCIENCE (IN TWO SECTIONS), Issue 10 2010
Hakan Akat
Abstract Novel water-borne macrophotoinitiator containing thioxanthone (TX) end group was successfully synthesized by using Diels,Alder (DA) [4 + 2] click chemistry strategy. For this purpose, thioxanthone-anthracene (TX-A) and maleimide end-functionalized poly(ethylene glycol) (PEG-MI) were reacted in toluene at reflux temperature for 48 h. The final polymer (PEG-TX) and the intermediates were characterized in detail by spectral analysis. PEG-TX possesses absorption characteristics similar to the parent TX. The one-component photoinitiating nature of the photointiator was demonstrated by photopolymeization of several hydrophilic vinyl monomers, such as acrylic acid, acrylamide, 2-hydroxyethyl acrylate, and 1-vinyl-2-pyrrolidone. © 2010 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 48: 2109,2114, 2010 [source]

Water-Soluble Polymeric Thioxanthone Photoinitiator Containing Glucamine as Coinitiator

MACROMOLECULAR CHEMISTRY AND PHYSICS, Issue 15 2008
Xuesong Jiang
Abstract A novel kind of water-soluble polymeric photoinitiator was synthesized by introducing thioxanthone moieties and glucamine into the polymeric chain, as well as low-molecular weight model compounds. The photochemical and photophysical properties of these photoinitiators were studied. PTX-GA possesses a similar UV-vis absorption, weaker fluorescence emission and a shorter lifetime of the TX triplet state (,) as compared to TX-MGA and TX-PMAC/MDEA. ESR showed that in TX-PMAC/MDEA the smallest number of radicals is generated. Photopolymerization of arylamide and methylene bisacryamide initiated by these photoinitiators shows that PTX-GA is more effective than TX-MGA and TX-PMAC/MDEA. [source]

Polymeric Photoinitiator Containing In-Chain Thioxanthone and Coinitiator Amines

MACROMOLECULAR RAPID COMMUNICATIONS, Issue 6 2004
Xuesong Jiang
Abstract Summary: A polymeric photoinitiator (PTXP) containing in-chain thioxanthone (TX) and coinitiator amines was synthesized by step-growth polymerization, as well as low-molecular-weight model compounds. Photopolymerizations of methyl methacrylate (MMA) initiated by these photoinitiator systems were studied. Compared with corresponding low-molecular-weight model compounds, PTXP has a similar UV-vis spectrum with a red-shifted maximum absorption, and weaker fluorescence emission, and can photoinitiate the polymerization of MMA more effectively. The structure of PTXP, the photoinitiator synthesized here. [source]

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

JOURNAL OF POLYMER SCIENCE (IN TWO SECTIONS), Issue 10 2006
Qing-Fa Si
Abstract 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 [source]