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

Authors

  • Arjen Boersma

    Corresponding author
    1. TNO Institute 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
    • TNO Institute of Industrial Technology, Division of Polymer Technology, P.O. Box 6235, 5600 HE Eindhoven, Netherlands
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Abstract

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 antioxidant 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. J Appl Polym Sci 89: 2163–2178, 2003

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