ISSN:
0887-6266
Schlagwort(e):
thermal field-flow fractionation
;
dynamic light scattering
;
diffusion NMR
;
thermal diffusion
;
polybutadiene/polytetrahydrofuran
;
Chemistry
;
Polymer and Materials Science
Quelle:
Wiley InterScience Backfile Collection 1832-2000
Thema:
Chemie und Pharmazie
,
Physik
Notizen:
The thermal diffusion coefficient (Dτ) was determined for polybutadiene and polytetrahydrofuran (i.e., polyoxytetramethylene) standards of different molecular masses in various organic solvents. The combination of thermal field-flow fractionation retention data with diffusion data from dynamic light scattering or diffusion NMR experiments yielded the thermal diffusion coefficients. In agreement with earlier work on thermal diffusion of polymers in solution, the thermal diffusion coefficient was found to be independent of the molecular mass of the polymers. However, this work once more indicates that the Dτ value is strongly influenced by the chemical composition of both the polymer and the solvent. © 1996 John Wiley & Sons, Inc.
Zusätzliches Material:
5 Ill.
Materialart:
Digitale Medien
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