Gel shrinking resulting from uneven distribution of ionic micelles between the inside and the outside of the polymer gel network

The volume change of crosslinked nonionic poly (N‐isopropylacrylamide) (NIPA) polymer gel immersed in tetradecyldimethylaminoxide (C14DMAO) surfactant solutions at 0.1M NaCl, were investigated to distinguish between binding and nonbinding polymer gel/C14DMAO surfactants. Also, the aggregation behavi...

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Bibliographic Details
Published in:Journal of applied polymer science 2004-09, Vol.93 (5), p.2001-2006
Main Authors: El Sayed, A. Mounir, Kawasaki, H., Maeda, H.
Format: Article
Language:English
Subjects:
Applied sciences
degree of ionization
Exact sciences and technology
NIPA gel
Physicochemistry of polymers
Polymer industry, paints, wood
swelling
Technology of polymers
tetradecyldimethylaminoxide
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Summary:The volume change of crosslinked nonionic poly (N‐isopropylacrylamide) (NIPA) polymer gel immersed in tetradecyldimethylaminoxide (C14DMAO) surfactant solutions at 0.1M NaCl, were investigated to distinguish between binding and nonbinding polymer gel/C14DMAO surfactants. Also, the aggregation behavior of C14DMAO surfactants the inside and the outside the polymer hydrogels has been studied through solubilization of Sudan III dye. For the C14DMAO surfactants at the degrees of ionization (α) of 0.5 and 1, they bind to the NIPA gel at low surfactant concentration (CD) that enhance the gel swelling due mainly to the osmotic pressure contribution from the counter ions (regime I, CD
ISSN:0021-8995
1097-4628
DOI:10.1002/app.20634