Chain trapping in diblock copolymers near the ordering transition

Autor:	Kiriaki Chrissopoulou, Stergios Pispas, Nikos Hadjichristidis, A. N. Semenov, Frank Rittig, George Fytas, M. Xenidou, Gerald Fleischer, Jörg Kärger, Spiros H. Anastasiadis
Rok vydání:	2000
Předmět:	Condensed Matter::Soft Condensed Matter Materials science Chain (algebraic topology) Chemical physics Molecular motion Copolymer General Physics and Astronomy Concentration effect Trapping Plateau (mathematics) Displacement (fluid) Thermodynamic potential
Zdroj:	Europhysics Letters (EPL). 51:68-74
ISSN:	1286-4854 0295-5075
DOI:	10.1209/epl/i2000-00338-1
Popis:	The mean-square displacement, Δr2, of very high molecular weight diblock copolymers in solutions near the disorder-to-order transition is investigated by pulsed-field-gradient NMR. The thermodynamic potential influencing the motion leads to a time-in de pend ent Δr2 at short times followed by free-diffusional behavior. The plateau is attributed to a trapping of the copolymer chains at the "quasi-interfaces" formed by slow composition fluctuations.
Databáze:	OpenAIRE
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