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Dynamic heterogeneity in diblock copolymer systems
Author(s) -
Fytas George
Publication year - 1994
Publication title -
macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 1022-1360
DOI - 10.1002/masy.19940870116
Subject(s) - copolymer , materials science , relaxation (psychology) , dynamic light scattering , chemical physics , anisotropy , diffusion , polymer chemistry , scattering , chain (unit) , orientation (vector space) , polymer , thermodynamics , chemistry , nanotechnology , optics , physics , composite material , psychology , social psychology , nanoparticle , geometry , mathematics , astronomy
Abstract Dynamic light scattering from diblock copolymers in melt and solution in a non‐selective solvent reveals different mechanisms for relaxing the composition and orientation fluctuations near the order to disorder transition (ODT). For the former, internal relaxation and copolymer chain diffusion are the main relaxation processes whereas the latter relate to collective orientation of the copolymer chains near the ODT and induced form anisotropy of coherently ordered microstructures below ODT.