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首页> 外文期刊>Journal of Applied Polymer Science >Sorption and desorption parameters of water or ethanol in light-cured dental dimethacrylate resins
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Sorption and desorption parameters of water or ethanol in light-cured dental dimethacrylate resins

机译：水或乙醇在光固化牙科二甲基丙烯酸酯树脂中的吸附和解吸参数

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摘要

Two cycles of sorption/desorption of water or ethanol by light-cured dental resins of bisphenol A glycol dimethacrylate (Bis-GMA), bisphenol A ethoxylated dimethacrylate (Bis-EMA) urethane dimethacrylate (UDMA) triethylene glycol dimethacrylate and decanediol dimethacrylate (D(3)MA) were studied. The experimental curves m(t) = f(t) taken for the first water sorption by poly-Bis-GMA, poly-Bis-EMA and poly-UDMA showed a maximum. A maximum was also observed in the curve obtained for first sorption of ethanol by poly-Bis-GMA. In all other cases, the curves for sorption or desorption of water or ethanol showed Fickian behavior. The experimental data obtained for first sorption of water or ethanol were perfectly fitted to a new proposed equation, which predicts water or ethanol sorption with simultaneous extraction of unreacted the monomer. This equation gave us the possibility for the determination of the diffusion coefficient of the extraction of the unreacted Bis-GMA during the water and ethanol sorption, as well as the diffusion coefficient of the extraction of the unreacted Bis-EMA and UDMA during the water sorption. The maximum water or ethanol absorbed at equilibrium and the diffusion coefficient are determined from the second sorption/desorption cycle during which the extraction of the monomer is negligible. (C) 2007 Wiley Periodicals, Inc.
机译：双酚A二醇二甲基丙烯酸酯（Bis-GMA），双酚A乙氧基化二甲基丙烯酸酯（Bis-EMA）尿烷二甲基丙烯酸酯（UDMA）三乙二醇二甲基丙烯酸酯和癸二醇二甲基丙烯酸酯（D（ 3）MA）进行了研究。 poly-Bis-GMA，poly-Bis-EMA和poly-UDMA首次吸水的实验曲线m（t）= f（t）显示最大值。在通过poly-Bis-GMA第一次吸附乙醇获得的曲线中也观察到最大值。在所有其他情况下，水或乙醇的吸附或解吸曲线均显示出Fickian行为。首次吸附水或乙醇获得的实验数据完全符合新提出的方程式，该方程式预测了水或乙醇的吸附以及同时萃取未反应的单体。该方程为我们提供了确定水和乙醇吸附过程中未反应的Bis-GMA提取物的扩散系数，以及水吸附过程中未反应的Bis-EMA和UDMA提取物的扩散系数的可能性。 。由第二次吸附/解吸循环确定在平衡时吸收的最大水或乙醇和扩散系数，在第二次吸附/解吸循环期间，单体的提取可忽略不计。 （C）2007 Wiley期刊公司

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