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Anisotropic phase separation of polymer blends induced by polarization‐selective photoisomerization
Author(s) -
Endoh Kouichi,
TranCong Qui
Publication year - 1999
Publication title -
macromolecular rapid communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.348
H-Index - 154
eISSN - 1521-3927
pISSN - 1022-1336
DOI - 10.1002/(sici)1521-3927(19990701)20:7<390::aid-marc390>3.0.co;2-f
Subject(s) - photoisomerization , polystyrene , anisotropy , materials science , polymer , ether , polarization (electrochemistry) , glass transition , phase (matter) , polymer chemistry , photochemistry , optics , chemistry , composite material , organic chemistry , physics , catalysis , isomerization
Anisotropic phase separation of polystyrene/poly(vinyl methyl ether) (PS/PVME) blends was induced by photoisomerization of trans‐ stilbene moieties labeled on the PS chains (abbreviated hereafter as PSS chains) using linearly polarized light. As temperature increases, the anisotropy becomes weaker and eventually disappears at 10°C above the glass transition of the PSS component. It was concluded that the elastic stress associated with the spatial distribution of the reaction is responsible for this morphological anisotropy.