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'Diffusion' in keywords Facet   Publication Year 1995  [X]
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1Author    A. Heinrich-Schramm, W. E. Price, H.-D LüdemannRequires cookie*
 Abstract    h e In flu e n c e o f D ip o le -D ip o le I n te r a c tio n a n d H y d r o g e n B o n d in g U p o n T r a n s la tio n a l D iffu s iv ity in S im p le F lu id s Self-diffusion coefficients of dimethylether have been measured as a function of temperature (185-458 K) and pressure (up to 200 MPa) by pulse-gradient field spin-echo NMR. Calculated activation volumes (AV*) fall from 15 (10-6 m3/mole) at the highest temperature to 7 (10~6 m3/mole) at the lowest. This trend is in keeping with values for other non-associating liquids. Comparison with self diffusion data for propane and ethanol reveals that the translational diffusivity in dimethylether is influenced by the substance's modest dipole moment (1.3 Debye). The effect is small but measur­ able and becomes more pronounced at lower temperatures. S e lf-D iffu s io n in C o m p re s s e d D im e th y le th e r : 
  Reference    Z. Naturforsch. 50a, 145—148 (1995); received October 5 1994 
  Published    1995 
  Keywords    Dimethylether, Diffusion, High Pressure 
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 TEI-XML for    default:Reihe_A/50/ZNA-1995-50a-0145.pdf 
 Identifier    ZNA-1995-50a-0145 
 Volume    50