TY  - JOUR
AU  - Klein, M.
AU  - Wiegand, S.
TI  - The Soret effect of mono-, di- and tri-glycols in ethanol
JO  - Physical Chemistry Chemical Physics
VL  - 13
SN  - 1463-9076
CY  - Cambridge
PB  - RSC Publ.
M1  - PreJuSER-15469
SP  - 7090 - 7094
PY  - 2011
N1  - We would like to thank Pablo Blanco and Bastian Arlt for many fruitful discussions and Hartmut Kriegs for technical support. Financial support due to the Deutsche Forschungsgemeinschaft grant Wi 1684 is gratefully acknowledged.
AB  - We employed thermal diffusion forced Rayleigh scattering (TDFRS) to investigate the chain length dependence of the thermal diffusion behavior of short glycols in ethanol. We studied three glycols, monoethylenglycol (MEG), diethylenglycol (DEG) and triethylenglycol (TEG), in an ethanol solution. In contrast to the polymer polyethylenglycol, the shorter glycols used within the framework of this study are completely soluble in ethanol, at least for low molar fractions. In order to guarantee a good solubility of the glycols, the measurements were limited to molar fractions of 10% and 20%. As the different glycols only differ by their chain length it will be possible to deduce its influence on the thermal diffusion properties. Due to the fairly short persistence length of the glycols, D(T) reaches already for the dimer a plateau value. This finding agrees with simulation results. Furthermore, the thermal expansion and the kinematic viscosity are measured to investigate if empirical correlations seen for other systems could be confirmed.
KW  - J (WoSType)
LB  - PUB:(DE-HGF)16
C6  - pmid:21409281
UR  - <Go to ISI:>//WOS:000288951000035
DO  - DOI:10.1039/c1cp00022e
UR  - https://juser.fz-juelich.de/record/15469
ER  -