Mobility and solubility of antioxidants and oxygen in glassy polymers. I. Concentration and temperature dependence of antioxidant sorption

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作者：
Boersma, Arjen [1 ,2 ]
机构：
[1] TNO Inst. of Industrial Technology, Division of Polymer Technology, P.O. Box 6235, 5600 HE Eindhoven, Netherlands
[2] Dutch Polymer Institute, P.O. Box 902, 5600 AX Eindhoven, Netherlands
来源：
| 1600年 / John Wiley and Sons Inc.卷 / 89期
关键词：
Antioxidants - Diffusion - Oxygen - Phenols - Solubility - Sorption - Thermodynamic properties;
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摘要：
Sorption experiments have been conducted at temperatures between 65 and 135°C using five phenolic antioxidants in polycarbonate at different antioxidant concentrations. A model based on the free volume was used to predict the mobility of the additives. In this model, the ratio of the specific volume of a jumping unit to the free volume available in the polymer determines the diffusion behavior of the additives. It was found that the mobility of the anti-oxidant was predicted accurately using literature and experimental data on the free volume in polycarbonate. Furthermore, the solubility of the antioxidants was predicted very well, based on thermodynamic considerations. © 2003 Wiley Periodicals, Inc.
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