期刊论文详细信息
Química Nova | |
Monomer conversion of composite dental resins photoactivated by a halogen lamp and a LED: a FT-Raman spectroscopy study | |
Universidade do Vale do Paraíba, São José dos Campos1  Soares, Luís Eduardo Silva1  Pinheiro, Antonio L. B.1  Zampieri, Marcelo1  Martin, Airton Abrahão1  Rocha, Rick1  Universidade Federal de São Carlos, São Carlos1  Universidade Federal da Bahia, Salvador1  | |
关键词: composites; degree of conversion; FT-Raman spectroscopy.; | |
DOI : 10.1590/S0100-40422005000200012 | |
学科分类:化学(综合) | |
来源: Sociedade Brasileira de Quimica | |
【 摘 要 】
Eighteen circular blocks of resins cured either by a LED or a halogen lamp (20, 40 and 60 s), had their top (T) and bottom (B) surfaces studied using a FT-Raman spectrometer. Systematic changes in the intensity of the methacrylate C=C stretching mode at 1638 cm-1 as a function of exposure duration were observed. The calculated degree of conversion (DC) ranged from 45.0% (B) to 52.0% (T) and from 49.0% (B) to 55.0% (T) for the LED and halogen lamp, respectively. LED and halogen light produced similar DC values with 40 and 60 s of irradiation.
【 授权许可】
Unknown
【 预 览 】
Files | Size | Format | View |
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RO201912050593265ZK.pdf | 302KB | download |