Application of the porous-sphere hydrodynamic model to dilute polymer solutions

Autor:	Milton E. McDonnell, Alexander M. Jamieson
Rok vydání:	1980
Předmět:	chemistry.chemical_classification Chemistry Intrinsic viscosity Diffusion General Engineering Thermodynamics Polymer Square (algebra) chemistry.chemical_compound Permeability (electromagnetism) Polymer chemistry Molecule Polystyrene Porosity
Zdroj:	Journal of Polymer Science: Polymer Physics Edition. 18:1781-1790
ISSN:	1542-9385 0098-1273
Popis:	The porous-sphere model of Debye–Brinkman–Bueche is applied to predict the limiting frictional coefficient f0 and intrinsic viscosity [η] of polystyrene fractions in tetrahydrofuran and random protein coils in 6M guanidine hydrochloride. Following the formulation of Wiegel and Mijnlieff, the molecular permeability is modeled to increase exponentially as the square of the distance from the center of the molecule. A method is developed to obtain this permeability from the translational diffusion coefficient. The experimental values of f0 and [η] are in satisfactory agreement with the calculated values. Also, this analysis predicts values of the Mandelkern–Flory–Scheraga parameter for flexible coils which are significantly smaller than the minimum values permitted by the Kirkwood–Riseman theory. This is in accord with the experimental evidence.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::f70ac96c9621cf861123209aa63cccfa https://doi.org/10.1002/pol.1980.180180810 Zobrazit plný text záznamu Plný text