TY  - JOUR
AU  - Wang, Zilin
AU  - Afanasenkau, Dzmitry
AU  - Dong, Minjie
AU  - Huang, Danni
AU  - Wiegand, Simone
TI  - Molar mass and temperature dependence of the thermodiffusion of polyethylene oxide in water/ethanol mixtures
JO  - The journal of chemical physics
VL  - 141
IS  - 6
SN  - 1089-7690
CY  - Melville, NY
PB  - American Institute of Physics
M1  - FZJ-2014-04389
SP  - 064904 
PY  - 2014
AB  - 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.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000340713700054
DO  - DOI:10.1063/1.4891720
UR  - https://juser.fz-juelich.de/record/155214
ER  -