Degree of conversion of polymer-matrix composite assessed by FTIR analysis
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Data
2013-01-01
Autores
Tonetto, Mateus Rodrigues
Pinto, Shelon Cristina Souza
Rastelli, Alessandra de Nara Souza
Borges, Alvaro Henrique
Saad, José Roberto Cury [UNESP]
Pedro, Fábio Luis Miranda
Andrade, Marcelo Ferrarezi de [UNESP]
Bandéca, Matheus Coelho
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Resumo
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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Palavras-chave
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
Como citar
Journal of Contemporary Dental Practice, v. 14, n. 1, p. 76-79, 2013.