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Polymer Bulletin
Erschienen in: Polymer Bulletin 2/2012

01.01.2012 | Original Paper

Competitive mechanism of poly(ethylene glycol) with poly(vinyl methyl ether) in complexing water molecules revealed with elastic light scattering spectroscopy

verfasst von: Wenzhi Zhang, Xudong Chen, Jin Yang, Mingqiu Zhang

Erschienen in: Polymer Bulletin | Ausgabe 2/2012

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Abstract

By using elastic light scattering (ELS) spectroscopy, dependences of lower critical solution temperature (LCST) of poly(vinyl methyl ether) (PVME)/poly(ethylene glycol) (PEG) solutions on concentration (C PEG) and molecular weight of PEG were analyzed. It was found that the onset temperature of phase separation (T p) decreased with increasing C PEG or molecular weight of PEG in the solutions. It indicated that PEG was competitive with PVME in complexing water molecules. The presence of PEG disturbed the hydration layer around PVME, facilitating the aggregation of PVME chains at lower temperature. Moreover, the ELS spectra revealed the aggregation and dissociation of molecular chains in PVME/PEG solutions during one heating and cooling cycle. PVME chains aggregated above the microphase transition temperature. With further increasing temperature, PVME aggregates started to contract, and then kept stable. During cooling, the chain aggregates were not immediately swelled but gradually swelled, and began to dissociate when the solution temperature was further decreased. Finally, the conformation of the molecular chains returned to its original state.
Vorheriger Artikel Preparation and characterization of degradable oxidized bacterial cellulose reacted with nitrogen dioxide
Nächster Artikel Influence of selected photoinitiators type II on tack, peel adhesion, and shear strength of UV-crosslinked solvent-borne acrylic pressure-sensitive adhesives used for medical applications

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Metadaten
Titel
Competitive mechanism of poly(ethylene glycol) with poly(vinyl methyl ether) in complexing water molecules revealed with elastic light scattering spectroscopy
verfasst von
Wenzhi Zhang
Xudong Chen
Jin Yang
Mingqiu Zhang
Publikationsdatum
01.01.2012
Verlag
Springer-Verlag
Erschienen in
Polymer Bulletin / Ausgabe 2/2012
Print ISSN: 0170-0839
Elektronische ISSN: 1436-2449
DOI
https://doi.org/10.1007/s00289-011-0554-4

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