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In situ chemical analysis of domains in polymer biends by optical fluorescence microscopy
Author(s) -
DibbernBrunelli D.,
Atvars T. D. Z.
Publication year - 1995
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.1995.070580410
Subject(s) - vinyl alcohol , polymer , optical microscope , fluorescein , anthracene , materials science , fluorescence microscope , fluorescence , microscopy , vinyl acetate , phase (matter) , polymer chemistry , chemical engineering , diffusion , in situ , analytical chemistry (journal) , chemistry , photochemistry , organic chemistry , optics , scanning electron microscope , composite material , copolymer , physics , thermodynamics , engineering
Poly(vinyl alcohol) (PVA)/poly(vinyl acetate) (PVAc) blends in different proportions show phase separation in the solid state. The dimensions, shapes, and distributions of the domains produced by the phase separation process are dependent on the composition and can be observed by conventional optical microscopy. However, using fluorescence optical microscopy of polymer blends in different compositions containing anthracene and/or fluorescein molecules dissolved in the matrices we were able to do a chemical discrimination of each domain. We also observed that anthracene is mainly localized in PVAc domains and fluorescein in PVA domains, and that the diffusion process of these fluorophers within the matrices is controlled by specific polymer–dye interactions. © 1995 John Wiley & Sons, Inc.