✦ LIBER ✦

Study of thermal diffusion of polybutadiene and polytetrahydrofuran in various organic solvents

✍ Scribed by A. C. van Asten; W. Th. Kok; R. Tijssen; H. Poppe

Publisher: John Wiley and Sons
Year: 1996
Tongue: English
Weight: 973 KB
Volume: 34
Category: Article
ISSN: 0887-6266
DOI: 10.1002/(sici)1099-0488(19960130)34:2<297::aid-polb10>3.0.co;2-e

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✦ Synopsis

The thermal diffusion coefficient (DT) 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 DT value is strongly influenced by the chemical composition of both the polymer and the solvent.

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