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000155214 1001_ $$0P:(DE-Juel1)144087$$aWang, Zilin$$b0$$ufzj
000155214 245__ $$aMolar mass and temperature dependence of the thermodiffusion of polyethylene oxide in water/ethanol mixtures
000155214 260__ $$aMelville, NY$$bAmerican Institute of Physics$$c2014
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000155214 520__ $$aIn this work we study the molar mass dependence of the thermodiffusion of polyethylene oxide at different temperatures in ethanol, water/ethanol mixture (c_water=0.7) and water in a molar mass range up to M_w=180000 g/mol. Due to the low solubility of polyethylene oxide oligomers in ethanol the measurements are limited up to M_w=2200 g/mol. The specific water/ethanol concentration 0.7 has been chosen, because at this weight fraction the thermal diffusion coefficient, D_T, of water/ethanol vanishes so that the system can be treated as a pseudo binary mixture. The addition of ethanol will degrade the solvent quality, so that we expect a change of the interaction energies between polymer and solvent. The analysis of the experimental data within a theoretical model shows the need of a refined model, which takes specific interactions into account.
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000155214 7001_ $$0P:(DE-Juel1)144600$$aAfanasenkau, Dzmitry$$b1$$ufzj
000155214 7001_ $$0P:(DE-Juel1)162371$$aDong, Minjie$$b2$$ufzj
000155214 7001_ $$0P:(DE-HGF)0$$aHuang, Danni$$b3
000155214 7001_ $$0P:(DE-Juel1)131034$$aWiegand, Simone$$b4$$eCorresponding Author$$ufzj
000155214 773__ $$0PERI:(DE-600)1473050-9$$a10.1063/1.4891720$$gVol. 141, no. 6, p. 064904 -$$n6$$p064904 $$tThe @journal of chemical physics$$v141$$x1089-7690$$y2014
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