A kinetic study of the acceleration effect of substituted benzyl alcohols on the cationic photopolymerization rate of epoxidized natural oils

A kinetic study of the acceleration effect of substituted benzyl alcohols on the cationic photopolymerization rate of epoxidized natural oils

The rate of the cationic photopolymerization of epoxidized natural oils was enhanced by the addition of several mono, di and trisubstituted benzyl alcohols. The epoxidation of vegetable oils was achieved by using 30% hydrogen peroxide with methyl trioxo rhenium (MTO) as a phase transfer catalyst. Th...

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Bibliographic Details
Published in:Polymer (Guilford) Vol. 46; no. 5; pp. 1535 - 1541
Main Authors: Ortiz, Ricardo Acosta, López, Diana Prieto, Cisneros, María de Lourdes Guillén, Valverde, Julio Cesar Rico, Crivello, James V.
Format: Journal Article
Language:English
Published: Oxford Elsevier Ltd 14-02-2005
Elsevier
Subjects:
Applied sciences
Benzyl alcohols
Exact sciences and technology
Physicochemistry of polymers
Polymerization
Polymers and radiations
Radical induced cationic photopolymerization
Real-time infrared spectroscopy
Radical induced cationic photopolymerization
Real-time infrared spectroscopy
Benzyl alcohols
Reaction accelerator
Substituent effect
Ring opening polymerization
Bulk polymerization
Alcohol
Vegetable oil
Cationic polymerization
Experimental study
Reaction rate
Cyclic ether polymer
Hydroxyether
Photopolymerization
Reaction acceleration
Epoxide
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Summary:The rate of the cationic photopolymerization of epoxidized natural oils was enhanced by the addition of several mono, di and trisubstituted benzyl alcohols. The epoxidation of vegetable oils was achieved by using 30% hydrogen peroxide with methyl trioxo rhenium (MTO) as a phase transfer catalyst. Then, the effect of different methoxy-substituted benzyl alcohols on the curing rate was evaluated, using the real-time FT-IR technique. The overall result was an increase in the curing rate. The acceleration effect was explained on the basis of synergistic effects of two mechanisms, namely, the radical induced cationic photopolymerization and the activated monomer mechanism. Epoxidized oils with 2,5-dimethoxybenzyl alcohol as an accelerator exhibited the highest photopolymerization rate. Higher conversions were obtained using electron-transfer photosensitizers.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ISSN:0032-3861
1873-2291
DOI:10.1016/j.polymer.2004.12.020