Colloidal phase separation of concentrated PNIPAm solutions

In the concentration range of 1-6 wt %, solutions of a thermosensitive polymer (poly-N-isopropylacrylamide (PNIPAm), Mw = 1.4 x 10(5) g.mol(-1)) are shown to phase separate in the form of dense stable colloids of nearly pure polymer. Diffuse wave spectroscopy and small-angle neutron scattering both...

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Veröffentlicht in:Langmuir : the ACS journal of surfaces and colloids. - 1991. - 23(2007), 5 vom: 27. Feb., Seite 2404-7
1. Verfasser: Balu, Caroline (VerfasserIn)
Weitere Verfasser: Delsanti, Michel, Guenoun, Patrick, Monti, Fabrice, Cloitre, Michel
Format: Aufsatz
Sprache:English
Veröffentlicht: 2007
Zugriff auf das übergeordnete Werk:Langmuir : the ACS journal of surfaces and colloids
Schlagworte:Journal Article
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520 |a In the concentration range of 1-6 wt %, solutions of a thermosensitive polymer (poly-N-isopropylacrylamide (PNIPAm), Mw = 1.4 x 10(5) g.mol(-1)) are shown to phase separate in the form of dense stable colloids of nearly pure polymer. Diffuse wave spectroscopy and small-angle neutron scattering both provide consistent measurements of the colloidal size as a function of temperature. Results are in agreement with a Cahn regime of spinodal decomposition blocked at an early stage, prior to a growth that would lead to a macroscopic phase separation. [Early results of this work were presented at the 231st American Chemical Society National Meeting, Symposium on Amphiphilic Polymers, Atlanta, GA, 2006, March 26-30.] 
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700 1 |a Guenoun, Patrick  |e verfasserin  |4 aut 
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700 1 |a Cloitre, Michel  |e verfasserin  |4 aut 
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