Degree of conversion of polymer-matrix composite assessed by FTIR analysis
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Jaypee Brothers Medical Publishing
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Aims and objectives: The behavior of polymer-matrix composite is dependent on the degree of conversion. The aim of this study was to evaluate the degree of conversion of two resin cements following storage at 37°C immediately, 24 and 48 hours, and 7 days after light-curing by FTIR analysis. Materials and methods: The specimens were made in a metallic mold and cured with blue LED with power density of 500 mW/cm2 for 30 seconds. The specimens were pulverized, pressed with KBr and analyzed with FTIR following storage times. Statistical analysis used: ANOVA (two-way) and Tukey's post hoc. Results: To the polymer-matrix composites between 24 and 48 hours does not show a significant increase (p > 0.05), however, the highest values were found after 7 days. Conclusion: The polymer-matrix composites used in this study showed similarity on the degree of conversion and increased of according to the time of storage.
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Degree of conversion , FTIR analysis , Polymers , 2 hydroxyethyl methacrylate , 4 methacryloxyethyltrimellitic acid , 4-methacryloxyethyltrimellitic acid , bisphenol A bis(2 hydroxypropyl) ether dimethacrylate , carbon , macrogol derivative , methacrylic acid derivative , polymer , polymethacrylic acid derivative , polyurethan , resin , resin cement , tricarboxylic acid , triethylene glycol dimethacrylate , urethane dimethacrylate luting resin , chemistry , classification , dental bonding , dental curing light , human , infrared spectroscopy , materials testing , polymerization , radiation dose , radiation exposure , temperature , tight junction , time , Bisphenol A-Glycidyl Methacrylate , Carbon , Composite Resins , Curing Lights, Dental , Humans , Light-Curing of Dental Adhesives , Materials Testing , Methacrylates , Polyethylene Glycols , Polymerization , Polymethacrylic Acids , Polyurethanes , Radiation Dosage , Resin Cements , Self-Curing of Dental Resins , Spectroscopy, Fourier Transform Infrared , Temperature , Time Factors , Tricarboxylic Acids
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Journal of Contemporary Dental Practice, v. 14, n. 1, p. 76-79, 2013.
