Coefficients of diffusion and permeability of oxygen in PVB/PEG10 000 blends with different compositions are determined. We investigate the distribution of free volume in the polymer blends to predict coefficients of diffusion and permeability for gas separation membranes. We determine the temperatures at which conformational transitions of low-weight molecules (probes) introduced into polymeric blends are frozen. We use the FTIR spectroscopic method of conformational probes to determine the effective sizes of mobile free volume elements (FVE) for the blends of poly(vinyl butyral) (PVB) and poly(ethylene glycol) (PEG10 000).

中文翻译：

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用于气体分离膜的聚乙烯醇缩丁醛/聚乙烯醇共混物：氧气的扩散系数和渗透系数

确定了不同组成的PVB / PEG10000共混物中氧气的扩散系数和渗透系数。我们研究了聚合物共混物中自由体积的分布，以预测气体分离膜的扩散系数和渗透系数。我们确定引入聚合物共混物中的低分子量分子（探针）的构象转变被冻结的温度。我们使用构象探针的FTIR光谱法来确定聚乙烯醇缩丁醛（PVB）和聚乙二醇（PEG10 000）的混合物的自由体积元素（FVE）的有效尺寸。