| Autor: |
Fuetterer T; TU Berlin, Stranski-Laboratorium für Physikalische und Theoretische Chemie, Strasse des 17 Juni 112, D-10623 Berlin, Germany., Nordskog A, Hellweg T, Findenegg GH, Foerster S, Dewhurst CD |
| Jazyk: |
angličtina |
| Zdroj: |
Physical review. E, Statistical, nonlinear, and soft matter physics [Phys Rev E Stat Nonlin Soft Matter Phys] 2004 Oct; Vol. 70 (4 Pt 1), pp. 041408. Date of Electronic Publication: 2004 Oct 28. |
| DOI: |
10.1103/PhysRevE.70.041408 |
| Abstrakt: |
For diblockcopolymers of polybutadiene-poly(ethyleneoxide) (PB-PEO) type, water is a selective solvent. In dependence of the length of both blocks and the block length ratio, these polymers form a multitude of self-assembled structures in solution. In the present work scattering methods are used to investigate the water-soluble polymer PB125-PEO155 . It is found to form long rodlike micelles, which are characterized with respect to the aggregate length L , the cross sectional radius RCS , the radial scattering length density profile sigma r, and the radial aggregation number Nrad. Model-independent as well as model-based approaches are used for the scattering data analysis. From dynamic light scattering (DLS) and static light scattering (SLS) experiments the weight averaged length Lw of these stiff elongated aggregates is determined to Lw=350 nm . Small angle neutron scattering (SANS) reveals a cross sectional radius of RCS=17 nm and in combination with results from the SLS the radial aggregation number is found to be Nrad=70 . |
| Databáze: |
MEDLINE |
| Externí odkaz: |
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