Journal Article

FZJ-2014-04389

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Molar mass and temperature dependence of the thermodiffusion of polyethylene oxide in water/ethanol mixtures

Wang, Z.FZJ* ; Afanasenkau, D.FZJ* ; Dong, M.FZJ* ; Huang, D. ; Wiegand, S. (Corresponding Author)FZJ*

2014
American Institute of Physics Melville, NY

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Please use a persistent id in citations: http://hdl.handle.net/2128/7924  doi:10.1063/1.4891720

Abstract: In this work we study the molar mass dependence of the thermodiffusion of polyethylene oxide at different temperatures in ethanol, water/ethanol mixture (c_water=0.7) and water in a molar mass range up to M_w=180000 g/mol. Due to the low solubility of polyethylene oxide oligomers in ethanol the measurements are limited up to M_w=2200 g/mol. The specific water/ethanol concentration 0.7 has been chosen, because at this weight fraction the thermal diffusion coefficient, D_T, of water/ethanol vanishes so that the system can be treated as a pseudo binary mixture. The addition of ethanol will degrade the solvent quality, so that we expect a change of the interaction energies between polymer and solvent. The analysis of the experimental data within a theoretical model shows the need of a refined model, which takes specific interactions into account.

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Contributing Institute(s):

1. Weiche Materie (ICS-3)

Research Program(s):

1. 451 - Soft Matter Composites (POF2-451) (POF2-451)

Appears in the scientific report 2014

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Database coverage:
; ; Allianz-Lizenz / DFG ; Current Contents - Social and Behavioral Sciences ; JCR ; NCBI Molecular Biology Database ; Nationallizenz ; SCOPUS ; Science Citation Index ; Science Citation Index Expanded ; Thomson Reuters Master Journal List ; Web of Science Core Collection

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