Miscibility studies in poly(methyl vinyl ether)/hydroxypropylcellulose binary system in aqueous solutions and solid state

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• 作者：Z.S. Nurkeeva ; I.S. Tyukova ; A.I. Suvorova ; G.A. Mun ; A.B. Dzhusupbekova and V.V. Khutoryanskiy
• 关键词：Miscibility ; Polymeric films ; Lower critical solution temperature ; Thermodynamics
• 刊名：Carbohydrate Polymers
• 出版年：2005
• 出版时间：2005
• 年：2005
• 卷：62
• 期：1
• 页码：80-86
• 全文大小：265 K

文摘

The phase separation behaviour in aqueous mixtures of poly(methyl vinyl ether) and hydroxypropylcellulose has been studied by cloud points method and viscometric measurements. The miscibility of these blends in solid state has been assessed by infrared spectroscopy; methanol vapours sorption experiments and scanning electron microscopy. The values of Gibbs energy of mixing of the polymers and their blends with methanol as well as between each other were calculated. It was found that in solid state the polymers can interact with methanol very well but the polymer–polymer interactions are unfavourable. Although in aqueous solutions the polymers exhibit some intermolecular interactions their solid blends are not completely miscible.