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Phase‐separated polymer blends: Complementary studies between scanning electron microscopy, epifluorescence microscopy, and fluorescence microspectroscopy
Author(s) -
Granados E. G.,
GonzálezBenito J.,
Baselga J.,
DibbernBrunelli D.,
Atvars T. D. Z.,
Esteban I.,
Piérola I. F.
Publication year - 2001
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.1175
Subject(s) - vinyl alcohol , polymer blend , materials science , scanning electron microscope , polymer , fluorescence microscope , microscopy , chemical engineering , fluorescence , vinyl acetate , fluorescence spectrometry , polymer chemistry , fluorescence spectroscopy , analytical chemistry (journal) , chemistry , composite material , copolymer , chromatography , optics , physics , engineering
In this work a morphological description of poly(vinyl alcohol) (PVA)/poly(vinyl acetate) (PVAc) incompatible blends was carried out combining scanning electron microscopy, epifluorescence microscopy, and fluorescence microspectroscopy, and using anthracene and fluorescein probes dissolved in the polymer blends. Because the blends were prepared by casting from a water/ethanol solution over a polyethylene surface, two topologically different faces were formed and analysed: blend/air and blend/support faces. Droplets in matrix morphologies were observed for any composition here studied and sample annealing resulted in the coalescence of domains. Fluorescence micro‐spectroscopy of several parts of the material revealed that the dye distribution over the domain‐matrix interface is different of the internal or external parts of each domain and it is indicative of the interpenetration of both polymers at the interface region. © 2001 John Wiley & Sons, Inc. J Appl Polym Sci 80: 949–955, 2001