通过傅里叶变换红外光谱（FTIR）分析评估聚合物基复合材料的转化率。
Degree of conversion of polymer-matrix composite assessed by FTIR analysis.
作者信息
Tonetto Mateus Rodrigues, Pinto Shelon Cristina Souza, Rastelli Alessandra de Nara Souza, Borges Alvaro Henrique, Saad José Roberto Cury, Pedro Fábio Luis Miranda, de Andrade Marcelo Ferrarezi, Bandéca Matheus Coelho
机构信息
Department of Restorative Dentistry, University of Sao Paulo State, Araraquara School of Dentistry, Sao Paulo, Brazil.
出版信息
J Contemp Dent Pract. 2013 Jan 1;14(1):76-9. doi: 10.5005/jp-journals-10024-1274.
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/ cm(2) 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.
目的与目标
聚合物基复合材料的性能取决于固化程度。本研究的目的是通过傅里叶变换红外光谱（FTIR）分析，评估两种树脂水门汀在光固化后立即于37°C储存、24小时、48小时以及7天后的固化程度。
材料与方法
在金属模具中制作标本，并用功率密度为500 mW/cm²的蓝色发光二极管固化30秒。将标本粉碎，与溴化钾混合压制，并在不同储存时间后用FTIR进行分析。
所用统计分析方法
双向方差分析（ANOVA）和Tukey事后检验。
结果
聚合物基复合材料在24至48小时之间未显示出显著增加（p > 0.05），然而，在7天后发现了最高值。
结论
本研究中使用的聚合物基复合材料在固化程度上表现出相似性，并随储存时间增加。
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