Hoffmann S, Willner L, Richter D, Arbe A, Colmenero J, Farago B. Origin of dynamic heterogeneities in miscible polymer blends: A quasielastic neutron scattering study.
PHYSICAL REVIEW LETTERS 2000;
85:772-775. [PMID:
10991395 DOI:
10.1103/physrevlett.85.772]
[Citation(s) in RCA: 42] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/15/1999] [Indexed: 05/23/2023]
Abstract
In order to investigate the origin of the often invoked nanoheterogeneities in miscible polymer blends, we have performed quasielastic neutron scattering experiments on the component dynamics within the miscible polymer blend polyisoprene/polyvinyl ether including the pure components as a reference. We find that the apparent local heterogeneities observed by spectroscopic techniques originate from the chain specific crossover properties between entropy driven and local chain dynamics and are, thus, a purely dynamical phenomenon.
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