中文摘要：

溶剂分子在高分子聚合物中的扩散现象广泛存在于日常生活和工业生产中，对其研究具有普遍意义．Vrentas-Duda模型以自由体积理论为基础，所有参数不需扩散实验测量，由溶剂和高分子的分子性质独立确定，可用于预测高分子聚合物中低相对分子质量溶剂扩散系数．研究Vrentas-Duda模型对典型高分子／溶剂体系中溶剂扩散系数的预测准确性，通过将预测值与实验值比较，评价该模型在不同高分子体系中的适用情况．对处于橡胶态的各向同性高分子聚合物体系，Vrentas-Duda模犁能够准确计算除存在氢键以外多数体系的溶剂扩散系数；相对于溶剂互扩散系数而言，溶剂白扩散系数的预测精度更高．

英文摘要：

Solvent diffusion phenomenon in polymeric materials widely exists in both daily life and industrial processes, thus it is of universal significance to study on it. Vrentas and Duda proposed a model based on the free-volume theory to predict diffusion coefficients of low molecular weight solvent in polymeric materials. All parameters in the model were determined by solvent and polymer molecule properties respectively, without any direct diffusivity measurement. Using the Vrentas-Duda model, solvent diffusion coefficients in typical polymer/solvent systems were predicted and compared with experimental data for evaluating availability of the model. For most amorphous rubbery polymeric material systems, the Vrentas-Duda model gave satisfying accuracy for calculating solvent diffusion coefficients, except for the complicated systems with hydrogen bond. This calculation also showed better accuracy for solvent self diffusion coefficients than mutual-diffusion coefficients.