首页> 外文期刊>Journal of Applied Polymer Science >PREDICTING ABILITY OF FREE-VOLUME THEORY FOR SOLVENT SELF-DIFFUSION COEFFICIENTS IN RUBBERS
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PREDICTING ABILITY OF FREE-VOLUME THEORY FOR SOLVENT SELF-DIFFUSION COEFFICIENTS IN RUBBERS

机译:胶料中溶剂自扩散系数的自由体积理论的预测能力

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The effect of solvent size on the diffusion process is studied for various solvents with natural rubber and polybutadiene in terms of the free-volume theory. The importance of energy effects on the diffusion of penetrants in rubbers is examined. The critical molar volume of the polymer jumping unit is correlated with its glass transition temperature over the range 172 K to 305 K. The correlation shows a linear relationship between these two properties and can be used to predict one of the most sensitive free-volume parameters. Using this parameter in conjunction with the Vrentas-Duda free-volume theory, solvent self-diffusion coefficients in rubbers are then predicted over wide ranges of concentration and temperature. For all the systems, the predictions are comparable with experimental data. (C) 1996 John Wiley & Sons, Inc. [References: 28]
机译:根据自由体积理论,研究了各种溶剂对天然橡胶和聚丁二烯的扩散过程的影响。研究了能量对渗透剂在橡胶中扩散的重要性。聚合物跳跃单元的临界摩尔体积与其在172 K至305 K范围内的玻璃化转变温度相关。该相关关系显示这两个属性之间的线性关系,可用于预测最敏感的自由体积参数之一。结合Vrentas-Duda自由体积理论使用此参数,可以在宽范围的浓度和温度范围内预测橡胶中的溶剂自扩散系数。对于所有系统,预测结果均与实验数据相当。 (C)1996 John Wiley&Sons,Inc. [参考:28]

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