Small angle neutron scattering study of the micelle structure of amphiphilic block copolymers

Conference · Sun Jul 31 04:00:00 EDT 1994

OSTI ID:27060

Yamaoka, H; Matsuoka, H; Sumaru, K; Hanada, S ^[1]; Imai, M ^[2]; Wignall, G D ^[3]

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1. Kyoto Univ. (Japan). Dept. of Polymer Chemistry
2. Tokyo Univ. (Japan). Inst. for Solid State Physics
3. Oak Ridge National Lab., TN (United States)

The amphiphilic block copolymers of vinyl ether were prepared by living cationic polymerization. The partially deuterated copolymers for SANS experiments were especially synthesized by introducing deuterated phenyl units in the hydrophobic chain. SANS measurements were performed for aqueous solutions of these copolymers by changing H{sub 2}O/D{sub 2}O ratios. The SANS profiles indicate that the micelles in the present system exhibit a core-shell structure and that the size and shape of micelles are largely dependent on the length of hydrophobic chain. The micelle of shorter hydrophobic chain was found to be nearly spherical, whereas the micelle of longer hydrophobic chain was confirmed to have an ellipsoidal shape.

• Research Organization: Oak Ridge National Lab., TN (United States)
• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: AC05-84OR21400
• OSTI ID: 27060
• Report Number(s): CONF-9410165--12; ON: DE95006625
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
40 CHEMISTRY
COPOLYMERS
DEUTERATION
MICELLAR SYSTEMS
NEUTRON DIFFRACTION
SMALL ANGLE SCATTERING
STRUCTURAL CHEMICAL ANALYSIS
SURFACTANTS