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Personen: Loos, K. (Autor) 
Böker, A. (Autor) 
Zettl, H. (Autor) 
Zhang, A. F. (Autor) 
Krausch, Georg (Autor) 
Müller, A. H. E. (Autor) 
Titel: Micellar aggregates of amylose-block-polystyrene rod-coil block copolymers in water and thf
Quelle: Macromolecules. Bd. 38. H. 3. Washington : American Chemical Society. S. 873 - 879
Erscheinungsjahr:    2005
ISBN / ISSN: 0024-9297
URL der Originalveröffentlichung doi:10.1021/ma0345549
Zeitschriftenaufsatz Zeitschriftenaufsatz
Sprache: Englisch
Open Access:
Person der Universität:   
Einrichtung: Universitätsleitung
DDC-Sachgruppe:    Physik
ID: 11485  Universitätsbibliothek Mainz
Informationen zu den Nutzungsrechten unserer Inhalte Informationen zu den Nutzungsrechten unserer Inhalte
Abstract: Amylose-block-polystyrenes with various block copolymer compositions were investigated in water and in THF solution. Fluorescence correlation spectroscopy, dynamic light, scattering (DLS), and asymmetric flow field-flow fractionation with multiangle light scattering detection indicate the presence of unimers, oligomers, and large micellar species in THF. Up to four different species: were detectable by DLS with hydrodynamic radii ranging from a few nanometers to > 10 mum, indicating that the system is not in a thermodynamic equilibrium state. Collapsed aggregrates were monitored on a Silicon surface by scanning force microscopy and transmission electron microscopy. In water. crew-cut micelles were obtained from the same block copolymers by a single solvent approach, using elevated temperature and pressure. These crew-cut aggregates are much more uniform than the respective star aggregates in THF, and their radii scale with R-h proportional to N-core(1/4), R-h proportional to N-corona(1/6) in solution and with R proportional to N-core(1/4), R proportional to N-corona(1/2) on a silicon surface.
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