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Viscometric study of the coil‐globule transition of poly( N ‐isopropylacrylamide) in solutions of surfactant
Author(s) -
Staikos Georges
Publication year - 1995
Publication title -
macromolecular rapid communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.348
H-Index - 154
eISSN - 1521-3927
pISSN - 1022-1336
DOI - 10.1002/marc.1995.030161206
Subject(s) - aqueous solution , pulmonary surfactant , poly(n isopropylacrylamide) , polymer , macromolecule , sodium dodecyl sulfate , adsorption , polymer chemistry , chemical engineering , materials science , chemistry , copolymer , organic chemistry , biochemistry , engineering
The coil‐globule transition of poly( N ‐isopropylacrylamide) (systematic name: poly‐[1‐(isopropylaminocarbonyl)ethylene]) has been viscometrically investigated in low‐concentration aqueous sodium dodecyl sulfate solution. In this environment, even if the macromolecular coils collapse as the temperature increases above the lower critical solution temperature of the polymer, 34°C, the polymer does not precipitate. It seems that the hydrophobically collapsed macromolecular coils do not aggregate, but remain in solution with the aid of surface charges supplied by surfactant ions adsorbed through hydrophobic interactions.