Visible Light Curable Restorative Composites for Dental Applications Based on Epoxy Monomer

A cationic photo-curable cycloaliphatic epoxy resin has been investigated as reactive monomer in blue light crosslinking process. We have demonstrated that camphorquinone is able to abstract labile hydrogen from the epoxy monomer, giving rise to the formation of carbon-centered radicals that are oxi...

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Bibliographic Details
Published in:Materials 2014-01, Vol.7 (1), p.554-562
Main Authors: Vitale, Alessandra, Sangermano, Marco, Bongiovanni, Roberta, Burtscher, Peter, Moszner, Norbert
Format: Article
Language:English
Subjects:
Cationic
Conversion
Crosslinking
Curing
Dental materials
Formations
Free radicals
Hydrogen
Investigations
Light
Monomers
Polymerization
Radicals
Resins
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Summary:A cationic photo-curable cycloaliphatic epoxy resin has been investigated as reactive monomer in blue light crosslinking process. We have demonstrated that camphorquinone is able to abstract labile hydrogen from the epoxy monomer, giving rise to the formation of carbon-centered radicals that are oxidized by the onium salt; a complete epoxy group conversion was reached after 50 s of irradiation. The presence of water up to 1 wt% was tolerated without any important detrimental effect on the kinetics of light-curing. The presence of the inorganic filler up to 65 wt% did not significantly influence the curing process.
ISSN:1996-1944
1996-1944
DOI:10.3390/ma7010554