Properties of poly(vinyl alcohol)-graft-polyacrylamide copolymers depending on the graft length. 3. Benzene solubilization by solutions of the copolymer
| Autor: | Jean-Michel Guenet, N. E. Zagdanskaya, Tatyana Zheltonozhskaya, Vladimir Syromyatnikov, Lesya Momot |
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| Rok vydání: | 2003 |
| Předmět: |
Vinyl alcohol
Aqueous solution integumentary system Polymers and Plastics Hydrogen bond Organic Chemistry Polyacrylamide biochemical phenomena metabolism and nutrition Condensed Matter Physics chemistry.chemical_compound chemistry Intramolecular force Polymer chemistry Materials Chemistry Copolymer Molecule Benzene |
| Zdroj: | Macromolecular Symposia. 203:193-200 |
| ISSN: | 1521-3900 1022-1360 |
| Popis: | The peculiarities of poly(vinyl alcohol)-graft-polyacrylamide copolymers (PVA-g-PAA), which are characterized by the equal average number (N=9), but various molecular weight (or length) of graft chains, in comparison with individual PAA and PVA, were investigated in aqueous medium. Sharp rise in benzene solubilization in PVA-g-PAA solutions at M PAA higher than 4.3.10 5 has been established. It was shown that such effect is stipulated by the destruction of intramolecular polymer-polymer complex in the copolymer and increasing the benzene binding to separate PVA-g-PAA groups by means of hydrogen bonds. The changes in the PVA-g-PAA solubilizing ability as the function of temperature were also investigated. The obtained results are discussed from the point of view of conformational transitions of intramolecular polymer-polymer complexes (intraPPC), which exist in copolymers, in dependence on the length of graft chains. |
| Databáze: | OpenAIRE |
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