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Phase equilibrium in blends of crystalline poly(ethylene oxide) - amorphous poly(methyl acrylate) or poly(methyl methacrylate)

Phase separation in blends of crystalline poly(ethylene oxide) (PEO) and amorphous poly(methyl methacrylate) (PMMA) or poly(methyl acrylate) (PMA) has been examined using DTA, small‐angle light scattering, and polarized microscopy. The structure of the polymer blends was analysed by the wide‐angle X...

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Published in:Polymer international 2000-09, Vol.49 (9), p.1014-1016
Main Authors: Suvorova, Anna I, Hassanova, Albina H, Tujkova, Irina S
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Language:English
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description Phase separation in blends of crystalline poly(ethylene oxide) (PEO) and amorphous poly(methyl methacrylate) (PMMA) or poly(methyl acrylate) (PMA) has been examined using DTA, small‐angle light scattering, and polarized microscopy. The structure of the polymer blends was analysed by the wide‐angle X‐ray diffraction technique. It is found that phase separation takes place in both systems above the melting point (Tm) of the crystalline component. PEO/PMMA blends have an upper critical solution temperature above the glass transition temperature and Tm of the system. Components of PEO/PMMA blends are compatible in two regions: when the PMA concentration is 0.0–0.5 weight fraction or exceeds 0.8 weight fraction. PEO and PMA are immiscible in the melt at intermediate concentrations. It is shown that compatibility of components in the melt of crystalline and amorphous polymers is not a universal property of polymer blends. © 2000 Society of Chemical Industry
doi_str_mv 10.1002/1097-0126(200009)49:9<1014::AID-PI520>3.0.CO;2-J
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source Wiley-Blackwell Read & Publish Collection
subjects cloud point
melting point
phase diagram
phase separation
poly(ethylene oxide)
poly(methylacrylate)
poly(methylmethacrylate)
title Phase equilibrium in blends of crystalline poly(ethylene oxide) - amorphous poly(methyl acrylate) or poly(methyl methacrylate)
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