Poly(propylene oxide)-thioxanthone as one-component Type II polymeric photoinitiator for free radical polymerization with low migration behavior

[Display omitted] •New photoinitiators with enhanced solubility in common monomers.•Readily polymerizes different classes of industrially important monomers.•Low migration behavior, payable to the polymeric nature. A novel kind of low migration one-component Type II photoinitiators was synthesized b...

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Bibliographic Details
Published in:European polymer journal 2017-10, Vol.95, p.71-81
Main Authors: Kreutzer, Johannes, Kaya, Kerem, Yagci, Yusuf
Format: Article
Language:English
Subjects:
Aldehydes
Chemical synthesis
Free radical polymerization
Imines
Initiators
Leaching
Low migration
Migration
Monomers
One-component photoinitiator
Photoinitiators
Photopolymerization
Pol(propylene oxide)
Polymer films
Polymerization
Polypropylene
Propylene
Propylene oxide
Studies
Thioxanthone
Triethylamine
Type II photoinitiator
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Summary:[Display omitted] •New photoinitiators with enhanced solubility in common monomers.•Readily polymerizes different classes of industrially important monomers.•Low migration behavior, payable to the polymeric nature. A novel kind of low migration one-component Type II photoinitiators was synthesized by Schiff base reaction of thioxanthone aldehyde and amine functional poly(propylene oxide) (PPO) precursors with two different molecular weights. The final initiators (TX-PPO) were characterized in detail by spectral analysis and DFT theoretical calculations. The molecular weight of the PPO directly effects the solubility of the initiator in monomers. The one-component photoinitiating nature of the initiators was demonstrated by photobleaching and photo polymerization of several vinyl monomers in the absence of a hydrogen donor such as triethylamine. Leaching studies on the photocured polymer films show only negligible migration of the photoinitiator.
ISSN:0014-3057
1873-1945
DOI:10.1016/j.eurpolymj.2017.07.030