6533b82ffe1ef96bd1294f70
RESEARCH PRODUCT
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Rafael GavaraAgustín CamposJuan E. Figueruelosubject
chemistry.chemical_compoundVirial coefficientChemistryIntrinsic viscosityPolymer chemistryMethanolFlory–Huggins solution theorySolvent effectsTernary operationHeptanone3-Heptanonedescription
Intrinsic viscosities, [η], second virial coefficients, A2, and interaction potentials, g12, for the ternary systems alcohol (1)/3-heptanone (2)/poly(1-vinyl-2-pyrrolidone) (3), with the unbranched alcohols methanol, ethanol and 1-propanol, were determined at 25°C. Taking into account the dependence of the viscometric interaction parameter, B, with the molecular weight of the polymer, the unperturbed dimensions parameter, KΘ, of the polymer was unambiguously obtained. Relationships between ΔKΘ (defined as ΔKΘ = ΔK − KΘ) and excess Gibbs energies, GE, and between excess viscosity, Δ[η], and GE allow to obtain equations relating A2 to ΔKΘ or to Δ[η]. Therefore, A2 can be evaluated from experimental data of [η].
| year | journal | country | edition | language |
|---|---|---|---|---|
| 1990-08-01 | Die Makromolekulare Chemie |