%0 Conference Paper
%A Wang, Zilin
%A Afanasenkau, Dzmitry
%A Wiegand, Simone
%T Molar mass and temperature dependence of the thermodifusion of polyethylene oxide in water/ethanol mixtures
%I University of Cologne
%M FZJ-2014-03833
%D 2014
%X In this work we study the molar mass dependence of the thermodiffusion of polyethylene oxide atdifferent temperatures in water, ethanol and in a water/ethanol mixture (C_water = 0.7) in a molar massrange up to Mw=180000 g/mol. Due to the low solubility of polyethylene oxide oligomers in ethanol themeasurements are limited up to Mw=2200 g/mol. The specific water/ethanol concentration 0.7 is chosen,because at this weight fraction the thermal diffusion coefficient, D_T, of water/ethanol vanishes so thatthe system can be treated as a pseudo binary mixtures. The addition of ethanol will degrade the solventquality, so that we expect a change in the interaction energies, which can be calculated using a modelderived by Würger [1]. We also found that with adding ethanol to water, the thermodiffusion behavior ofPEO changes from thermophobic to thermophilic.
%B 11th International Meeting on Thermodiffusion
%C 2 Jun 2014 - 6 Jun 2014, Bayonne (France)
Y2 2 Jun 2014 - 6 Jun 2014
M2 Bayonne, France
%F PUB:(DE-HGF)24
%9 Poster
%U https://juser.fz-juelich.de/record/154519