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Development Of Miscible Blends From Intrapolymer Repulsive Interactions: Polycarbonate/Polystyrene Ionomers

Published online by Cambridge University Press:  10 February 2011

R. Xie
Affiliation:
Polymer Science Program and Department of Chemical Engineering, University of Connecticut Storrs, CT 06269–3136
R. A. Weiss
Affiliation:
Polymer Science Program and Department of Chemical Engineering, University of Connecticut Storrs, CT 06269–3136
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Abstract

The phase behavior of blends of zinc sulfonated polystyrene (ZnSPS) and bisphenol-A polycarbonate (PC) was studied as a function of the sulfonation level and the molecular weight of the ZnSPS ionomer. The system exhibits upper critical solution temperature (UCST) behavior. The cloud point temperatures increased with increasing ZnSPS molecular weight and decreased with increasing sulfonation level. No strong interactions between ZnSPS and PC were detected by FTIR. The composition dependence of the glass transition temperatures of the miscible blends exhibited negative deviation from linear additi vity, which is consistent with no or weak interactions between ZnSPS and PC. Miscibility is believed to arise from strong repulsive interactions between the charged and uncharged species on the ionomer chain.

Type
Research Article
Copyright
Copyright © Materials Research Society 1997

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