TY  - CONF
AU  - Wang, Zilin
AU  - Afanasenkau, Dzmitry
AU  - Wiegand, Simone
TI  - Molar mass and temperature dependence of the thermodifusion of polyethylene oxide in water/ethanol mixtures
PB  - University of Cologne
M1  - FZJ-2014-03833
PY  - 2014
AB  - 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.
T2  - 11th International Meeting on Thermodiffusion
CY  - 2 Jun 2014 - 6 Jun 2014, Bayonne (France)
Y2  - 2 Jun 2014 - 6 Jun 2014
M2  - Bayonne, France
LB  - PUB:(DE-HGF)24
UR  - https://juser.fz-juelich.de/record/154519
ER  -