Phase Behavior of Hydrogen-Bonded Polymer−Surfactant Mixtures in Selective Solvent

The phase behavior of the hydrogen-bonded poly(N-vinylpyrrolidone)−p-dodecylphenol (PVP−PDP) mixture in toluene solution was investigated. When the concentration of the PVP−PDP mixture in the toluene solution is lower than 10 wt %, the solution formed a clear sol. In the sol situation, a micelle con...

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Bibliographic Details
Published in:Macromolecules 2004-12, Vol.37 (26), p.10047-10051
Main Authors: Akiba, Isamu, Masunaga, Hiroyasu, Sasaki, Kanako, Jeong, Yeonhwan, Sakurai, Kazuo
Format: Article
Language:English
Subjects:
Applied sciences
Exact sciences and technology
Organic polymers
Physicochemistry of polymers
Properties and characterization
Solution and gel properties
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Summary:The phase behavior of the hydrogen-bonded poly(N-vinylpyrrolidone)−p-dodecylphenol (PVP−PDP) mixture in toluene solution was investigated. When the concentration of the PVP−PDP mixture in the toluene solution is lower than 10 wt %, the solution formed a clear sol. In the sol situation, a micelle consisting of the PVP core and the PDP shell was formed. Comparison of small-angle X-ray scattering (SAXS) measurements with theoretical scattering profiles calculated for some models indicated that the PVP−PDP micelle took a rodlike form with a 12 nm cross-sectional radius in the sol situation. On the other hand, the toluene solution of the PVP−PDP mixture formed a gel when the concentration of PVP−PDP in the solution is 10 wt % or above. SAXS analysis indicated that the rodlike structure of the PVP−PDP aggregate was maintained in the gel situation.
ISSN:0024-9297
1520-5835
DOI:10.1021/ma0483118