Factors influencing the aqueous solution behaviour of vinyl alcohol with vinyl acetate copolymers |
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| Affiliation: | 1. DSM Research, P.O. Box 18, 6160 MD Geleen, The Netherlands;2. School of Pharmacy, University of Bradford, Bradford BD7 1DP, England;1. 3B’s Research Group, I3Bs – Research Institute on Biomaterials, Biodegradables and Biomimetics, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, Avepark – Zona Industrial da Gandra, Guimarães 4805-017, Portugal;2. ICVS/3B’s – PT Government Associate Laboratory, Braga, Guimarães 4805-017, Portugal;1. Polymer Engineering Department, Faculty of Engineering, Urmia University, Urmia, Iran;2. Color and Polymer Research Center (CPRC), Amirkabir University of Technology, P.O. Box 15875-4413, Tehran, Iran;3. Advanced Materials Group, Iranian Color Society (ICS), P.O. Box 1591637144, Tehran, Iran;4. Center of Excellence in Electrochemistry, School of Chemistry, College of Science, University of Tehran, Tehran, Iran;5. Biosensor Research Center, Endocrinology & Metabolism Molecular-Cellular Sciences;6. Department of Resin and Additives, Institute for Color Science and Technology, P.O. Box: 16765-654, Tehran, Iran;7. Department of Tissue Engineering & Regenerative Medicine, Faculty of Advanced Technologies in Medicine, Iran University of Medical Sciences (IUMS), Tehran, Iran;8. Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA;9. Grupo de Materiales Compuestos Termoplásticos (CoMP), Instituto de Investigaciones en Ciencia y Tecnología de Materiales (INTEMA), Facultad de Ingeniería, Universidad Nacional de Mar del Plata (UNMdP) y Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Colón 10850, B7608FLC, Mar del Plata, Argentina;1. Shaanxi Key Laboratory of Degradable Biomedical Materials, Shaanxi R&D Center of Biomaterials and Fermentation Engineering, Biotech & Biomed Research Institute, School of Chemical Engineering, Northwest University, Xi''an, 710069, China;2. State Key Laboratory of Vegetable Biobreeding, Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing, 100081, China;3. College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, 100083, China;1. Engineering Research Center of the Ministry of Education for Wound Repair Technology, Jiangnan University, Affiliated Hospital of Jiangnan University, Wuxi, 214000, China;2. Wuxi School of Medicine, Jiangnan University, Wuxi, 214000, China;3. Medical School of Nantong University, Nantong, 226019, China;4. Nanjing University of Traditional Chinese Medicine, Nanjing, 210023, China;5. Changhai Clinical Research Unit, Shanghai Changhai Hospital, Naval Medical University, Shanghai, 200433, China;6. Department of Mechanical Engineering, University of Manitoba, Winnipeg, R3T 2N2, Canada |
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| Abstract: | Variations, as a function of temperature, are reported in the magnitude of values for the partial molal volume, partial molal expansibility, flowing volume and surface pressure for dilute solutions of a series of poly(vinyl alcohol-co-vinyl acetate) copolymers of various vinyl acetate contents and acetate sequence length. The temperature range investigated, from 5° to 30°, showed that, for all the examples examined, a general behaviour pattern was observed, indicating the predominance of hydrophilic interactions at temperatures below approximately 10°, with hydrophobic interactions predominating between 10° and 20°. The variations can be related to the detailed microstructure of the polymer backbone. |
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