Equilibrium Thermodynamics of a Quaternary Membrane-Forming System with Two Polymers. 2. Experiments
Equilibrium Thermodynamics of a Quaternary Membrane-Forming System with Two Polymers. 2. Experiments
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DOI：
10.1021/ma00086a010
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发表时间：
1994-04
期刊：
影响因子：
5.5
通讯作者：
R. Boom;H. Reinders;H. H. Rolevink-H.;A. V. D. Boomgaard;C. A. Smolders
中科院分区：
文献类型：
--
作者：
R. Boom;H. Reinders;H. H. Rolevink-H.;A. V. D. Boomgaard;C. A. Smolders
采用高压渗透法测定了聚醚砜(PES)-聚乙烯吡咯烷酮(PVP)- nmp -水四元体系中随浓度变化的二元Flory-Huggins相互作用参数。PVP与水的相互作用参数符合文献值。PES与NMP、PVP与NMP的相互作用参数呈浓度依赖性；这些值表示两种聚合物在溶剂中的接近-θ条件。聚合物PES和PVP之间的二元相互作用参数由三元渗透测量估计，发现相当低：在-0.5和-1.0之间
Concentration-dependent binary Flory-Huggins interaction parameters belonging to the quaternary system poly(ether sulfone) (PES)-poly(vinylpyrrolidone) (PVP)-NMP-water are determined by means of high-pressure osmometry. The interaction parameter between PVP and water was in accordance with literature values. The interaction parameters between PES and NMP and between PVP and NMP were found to be slightly concentration dependent; the values indicate near-θ conditions for both polymers in the solvent. The binary interaction parameter between the polymers PES and PVP is estimated from ternary osmotic measurements and found to be quite low: between -0.5 and -1.0