Physics – Condensed Matter – Soft Condensed Matter
Scientific paper
2005-05-04
Physics
Condensed Matter
Soft Condensed Matter
5 pages, 4 figures, PRL in press
Scientific paper
10.1103/PhysRevLett.94.195504
PEP-PEO block copolymer micelles offer the possibility to investigate phase behaviour and interactions of star polymers (ultra-soft colloids). A star-like architecture is achieved by an extremely asymmetric block ratio (1:20). Micellar functionality f can be smoothly varied by changing solvent composition (interfacial tension). Structure factors obtained by SANS can be quantitatively described in terms of an effective potential developed for star polymers. The experimental phase diagram reproduces to a high level of accuracy the predicted liquid/solid transition. Whereas for intermediate f a bcc phase is observed, for high f the formation of a fcc phase is preempted by glass formation.
Laurati M.
Lund Robert
Richter Dieter
Stellbrink J.
Willner L.
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