Journal
POLYMER INTERNATIONAL
Volume 58, Issue 8, Pages 851-857Publisher
WILEY
DOI: 10.1002/pi.2590
Keywords
redox initiators; frontal polymerization (FP); hydroxyethyl acrylate (HEA); propagating fronts; infrared thermal image
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Funding
- National Natural Science Foundation of China [20606016, 20576053]
- NSAF [10676013]
- '863' Important National Science & Technology Specific Project [2007AA06A402]
- Natural Science Foundation for Jiangsu Higher Education Institutions of China [07KJA53009]
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BACKGROUND: The reaction temperature for frontal polymerization (FP) initiated by redox initiators can be greatly decreased compared with FP initiated by peroxide initiator and disulfide initiator. We report the synthesis of poly(hydroxyethyl acrylate)s via free radical FP using benzoyl peroxide (BPO)/N,N-dimethylaniline (DMA) and ammonium persulfate (APS)/N,N,N',N'-tetramethylethylenediamine (TMEDA) couples as redox initiators at ambient pressure. RESULTS: The results show that unlike the phenomenon of bubbles and 'fingers' when using BPO alone, a self-sustaining and stable front can be obtained when the [DMA]/[BPO] ratio is higher than 1 (mol/mol). A slight increase of the DMA (or TMEDA) reductant concentration causes a marked decrease of front temperature to 53 degrees C (or 61 degrees C). CONCLUSION: We investigated the effects of the ratio of the oxidant to the reductant and the initiator and monomer concentrations on certain parameters of FP: formation of bubbles, front velocity and front temperature. This opens the way to the potential development of FP using more appropriate monomers with low boiling points. (C) 2009 Society of Chemical Industry
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