Thermal and structural properties of commercial dental resins light-cured with blue emitting diodes (LEDs)

被引：0
作者：
S. S. Rojas
G. J. M. Frigo
M. I. B. Bernardi
A. N. de S. Rastelli
A. C. Hernandes
V. S. Bagnato
机构：
[1] Universidade de São Paulo,Grupo Crescimento de Cristais e Materiais Cerâmicos, Instituto de Física de São Carlos
[2] Universidade de São Paulo,Grupo de Óptica, Instituto de Física de São Carlos
来源：
Journal of Thermal Analysis and Calorimetry | 2010年 / 99卷
关键词：
Degradation; Dental resins; DSC; FT-IR; Thermal analysis;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
We have investigated the thermal and structural properties of different commercial dental resins: FiltekTM Z-350, Grandio®, Tetric Ceram®, and TPH Spectrum®. The purpose of the present study was to evaluate quantitatively the photo-polymerization behavior and the effect of filler contents on the kinetic cures of the dental resins by using Differential Scanning Calorimetry (DSC) and Fourier Transform Infrared Spectroscopy (FT-IR) techniques. We have successfully obtained the low and high glass transition Tg values of the dental composite resins from DSC curves. It was also observed a good agreement between the both Tg values, activation energies from thermal degradation, and the degree of conversion obtained for all samples. The results have shown that Tetric Ceram® dental resin presented the higher Tg values, activation energy of 215 ± 6 KJ mol−1, and the higher degree of conversion (63%) when compared to the other resins studied herein.
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页码：263 / 268
页数：5
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