Dynamics of a triblock copolymer in a selective solvent for the middle block investigated using pulsed field gradient NMR

0188135 - UMCH-V 20000281 RIV US eng J - Journal Article
Fleischer, G. - Koňák, Čestmír - Puhlmann, A. - Rittig, F. - Kärger, J.
Dynamics of a triblock copolymer in a selective solvent for the middle block investigated using pulsed field gradient NMR.
Macromolecules. Roč. 33, č. 19 (2000), s. 7066-7071. ISSN 0024-9297. E-ISSN 1520-5835
R&D Projects: GA AV ČR IAA4050902; GA AV ČR IAA1050902
Subject RIV: CF - Physical ; Theoretical Chemistry
Impact factor: 3.697, year: 2000

Self-diffusivity of a hydrogenated polystyrene-block-polybutadiene-block-polystyrene triblock copolymer in an n-heptane solution was studied by the pulsed field gradient NMR. At low concentrations micelle-like aggregates were observed; larger aggregates, showing a tendency to anomalous diffusion, are formed with increasing concentration. At the highest concentrations, individual diffusion of insoluble domains is observed, but no transient network behavior.
Permanent Link: http://hdl.handle.net/11104/0002482