In situ evaluation of the polymerization kinetics and corresponding evolution of the mechanical properties of dental composites

In situ evaluation of the polymerization kinetics and corresponding evolution of the mechanical properties of dental composites

Polymer composites have been used in dental applications for more than 25 years. Although their properties and behavior have been systematically improved, they still are not able to produce dental restorations chemically, dimensionally and mechanically stable for long periods of time. Low degrees of...

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Bibliographic Details
Published in:Polymer testing Vol. 22; no. 1; pp. 77 - 81
Main Authors: Oréfice, R.L, Discacciati, J.A.C, Neves, A.D, Mansur, H.S, Jansen, W.C
Format: Journal Article
Language:English
Published: Oxford Elsevier Ltd 01-02-2003
Elsevier
Subjects:
Applied sciences
Composites
Dental composites
Exact sciences and technology
Forms of application and semi-finished materials
Fourier transform infrared spectroscopy
FTIR
Irradiation
Kinetics of polymerization
Microhardness
Monomers
Photopolymerization
Polymer industry, paints, wood
Reaction kinetics
Technology of polymers
Kinetics of polymerization
Dental composites
FTIR
Infrared spectrometry
Fourier transformation
Dental restoration
Conversion rate
Mechanical properties
Dispersion reinforced material
Methacrylate copolymer
Kinetic parameter
Experimental study
Microhardness
Composite material
Photochemical copolymerization
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Summary:Polymer composites have been used in dental applications for more than 25 years. Although their properties and behavior have been systematically improved, they still are not able to produce dental restorations chemically, dimensionally and mechanically stable for long periods of time. Low degrees of monomer conversion and poor processing control are some of the main features responsible for the materials instability. In this work, the monomer conversion of dental composites during visible light irradiation was in situ monitored by infrared spectroscopy. The relationship between degree of conversion and mechanical properties was obtained by evaluating the microhardness of composites with different degrees of conversion. The relationship obtained was then used to identify the evolution of the mechanical properties during photopolymerization.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ISSN:0142-9418
1873-2348
DOI:10.1016/S0142-9418(02)00052-1