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Quantitative Analysis of ″Polymer-Balls″ in Aqueous Solutions by Small-Angle Neutron Scattering  

Shibayama, Mitsuhiro (Neutron Scattering Laboratory, Institute for Solid State Physics, University of Tokyo)
Okabe, Satoshi (Neutron Scattering Laboratory, Institute for Solid State Physics, University of Tokyo)
Nagao, Michihiro (Neutron Scattering Laboratory, Institute for Solid State Physics, University of Tokyo)
Sugihara, Shinji (Department of Macromolecular Science, Graduate School of Science, Osaka University)
Aoshima, Sadahito (Department of Macromolecular Science, Graduate School of Science, Osaka University)
Harada, Tamotsu (Department of Polymer Chemistry, Graduate School of Engineering, Kyoto University)
Matsuoka, Hideki (Department of Polymer Chemistry, Graduate School of Engineering, Kyoto University)
Publication Information
Macromolecular Research / v.10, no.6, 2002 , pp. 311-317 More about this Journal
Abstract
The quantitative analysis of polymer micelles consisting of amphiphilic block copolymers was carried out by small-angle neutron scattering (SANS). The block copolymers, made of poly(2-ethoxyethyl vinyl ether-b-2-hydroxyethyl vinyl ether)(poly(EOVE-b-HOVE)), exhibited a sharp morphological transition from a homogeneous solution to a micelle structure with increasing temperature. This transition is accompanied by a formation of spherical domains of poly(EOVE) with a radius around 200 $\AA$. The variations of the size and its distribution of the domains were investigated as a function of polymer concentration and temperature. The validity of SANS analysis, including the wavelength- and incident-beam-smearing effects of the SANS instrument, was examined with a pre-calibrated polystyrene latex.
Keywords
SANS; block copolymers; poly(EOVE-b-HOVE); micelle; morphological transition;
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