The diffusion coefficient for water in shape memory polyurethane membranes depend on the polymer fractional free volume, diffusion energy ED and the interaction of water-polymer. 而体系的扩散是由自由体积,扩散活化能,水汽分子与形状记忆聚氨酯膜极性基团的相互作用力共同的结果。
The free volume properties of CG-PVA membrane were analyzed by positron annihilation lifetime spectroscopy, and apparent fractional free volume was calculated, which showed the same tendency of charge as permeation flux. 采用正电子湮没寿命谱仪表征了石墨聚乙烯醇膜的自由体积特性,计算得到石墨聚乙烯醇膜的表观自由体积分数,并且与渗透通量进行关联性对比。
The inhibition performance of inhibitor membranes was analyzed by calculating diffusion coefficient, fractional free volume and the interaction energy. 通过计算扩散系数、自由体积分数、相互作用能等,并对扩散行为的微观机理进行分析。