Nonionic Polymer−Salt Interactions in Dilute Solution:  The Poly(ethylene oxide)/LiClO4/Methanol System

Nonionic Polymer−Salt Interactions in Dilute Solution:  The Poly(ethylene oxide)/LiClO4/Methanol System

The interaction of lithium perchlorate with high molecular weight poly(ethylene oxide) (PEO) in dilute methanol solutions was studied using cloud point measurements, static and dynamic light scattering, and viscometry. For both good and poor solvent conditions, PEO/LiClO4 complexes form in coil oute...

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Veröffentlicht in:Macromolecules 1996-05, Vol.29 (11), p.3956-3959
Hauptverfasser: Banka, P. A, Selser, J. C, Wang, B, Shenoy, D. K, Martin, R
Format: Artikel
Sprache:eng
Schlagworte:
Applied sciences
Exact sciences and technology
Organic polymers
Physicochemistry of polymers
Properties and characterization
Solution and gel properties
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Zusammenfassung:The interaction of lithium perchlorate with high molecular weight poly(ethylene oxide) (PEO) in dilute methanol solutions was studied using cloud point measurements, static and dynamic light scattering, and viscometry. For both good and poor solvent conditions, PEO/LiClO4 complexes form in coil outer portions and charge−charge repulsions between these complexes swell the PEO coils and result in repulsive interactions between coils. A noteworthy consequence of this nonionic polymer → polyelectrolyte conversion is the “salting in” of PEO in methanol by LiClO4.
ISSN:0024-9297
1520-5835
DOI:10.1021/ma9518159