Solubility properties of poly(1,1-difluoroethylene) in dipolar aprotic solvents
| Autor: | M. Galin, J. C. Galin, G. Lutringer |
|---|---|
| Rok vydání: | 1989 |
| Předmět: |
chemistry.chemical_classification
Polymers and Plastics Intrinsic viscosity Solvatochromism General Chemistry Polymer Flory–Huggins solution theory 1 1-Difluoroethylene Surfaces Coatings and Films Solvent chemistry.chemical_compound Hildebrand solubility parameter chemistry Materials Chemistry Organic chemistry Physical chemistry Solubility |
| Zdroj: | Journal of Applied Polymer Science. 37:487-498 |
| ISSN: | 1097-4628 0021-8995 |
| DOI: | 10.1002/app.1989.070370215 |
| Popis: | A screening study of the solubility of poly(1,1-difluoroethylene) (PVF2, Mw = 2 × 105) at room temperature in a wide variety of dipolar aprotic species has facilitated the discovery of a series of new solvents (N-methyloxazolidone, cyclic-substituted ureas) and rationalization of the data in a two-dimensional solubility map involving their dipole moment, μ, and their hydrogenx-bond-accepting (HBA) power β (Taft solvatochromic parameter). This map may be used as a predictive tool for the research of new functional classes of solvents, such as N-substituted mixed amideester of phosphoric acid or N-substituted sulfurous diamides. The variations of the intrinsic viscosity of the polymer with solvent polarity may be quantitatively analyzed using a linear multiparametric correlation which emphasizes the two opposite contributions of cavitation effects (Hildebrand solubility parameter δ) and of polymer–solvent interactions (β) on the coil expansion: [η] (dL.g−1) = 0.792 - 1.2 × 10−3δ2(J.cm−3) + 1.59 β. Finally, 1,3-dimethyl-2-oxo-hexahydropyrimidine (N,N′-dimethylpropylene urea) leads to the highest value of the refractive index increment (dn/dc = −0.065 mL.g−1 at λ = 632 nm), and thus appears as the best solvent for light-scattering measurements. |
| Databáze: | OpenAIRE |
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