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Microstructure of miscible polymer blends
Author(s) -
Vesely D.,
Finch D. S.
Publication year - 1988
Publication title -
makromolekulare chemie. macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 0258-0322
DOI - 10.1002/masy.19880160123
Subject(s) - materials science , microstructure , polymer , dispersion (optics) , transmission electron microscopy , casting , scanning electron microscope , composite material , polymer blend , hildebrand solubility parameter , electron microscope , solvent , optical microscope , analytical chemistry (journal) , chemical engineering , optics , chemistry , copolymer , nanotechnology , chromatography , organic chemistry , physics , engineering
The purpose of this work is to describe the application of new electron microscopy techniques to the study of polymer blends with very fine dispersion of phases (miscible blends). Blends of PVC with PMMA, PCL, POM and SAN were prepared by high temperature mixing on a two roll mill, or by solvent casting. Thin sections (or cast films) were investigated in the scanning transmission electron microscope and small phases were identified in most blends. The contrast was enhanced by electronic combination of bright and dark field signals, by an irradiation and staining technique and by differential mass loss. The specimens were further characterized by measurement of mass loss, resulting from electron beam damage. The non linear changes in the mass loss rate with concentration were interpreted as being influenced by partial solubility and molecular interactions.