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Properties of poly(vinyl alcohol)‐ graft ‐polyacrylamide copolymers depending on the graft length. 3. Benzene solubilization by solutions of the copolymer
Author(s) -
Zagdanskaya Nina,
Momot Lesya,
Zheltonozhskaya Tatyana,
Guenet JeanMichel,
Syromyatnikov Vladimir
Publication year - 2003
Publication title -
macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 1022-1360
DOI - 10.1002/masy.200351318
Subject(s) - copolymer , polymer chemistry , vinyl alcohol , polymer , polyacrylamide , benzene , intramolecular force , aqueous solution , hydrogen bond , materials science , chemistry , molecule , organic chemistry , composite material
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.