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RESEARCH PRODUCT
Mark-Houwink Parameters of Biosynthetic Poly(γ-glutamic acid) in Aqueous Solution
Sebastián Muñoz-guerraIsabel IrurzunConcepción AbadAgustín CamposGraciela Pérez-cameroJordi J. Bousubject
Aqueous solutionChromatographyPolymers and PlasticsMolecular massChemistryCalibration curveOrganic ChemistryMark–Houwink equationGlutamic acidPermeationCondensed Matter PhysicsIonic strengthMaterials ChemistryA valuePhysical and Theoretical Chemistrydescription
A combined viscosity–light scattering–gel permeation chromatography (GPC) study was carried out on bacterially produced poly(γ-glutamic acid) (PGGA). PGGA samples with weight-average molecular weights ranging from 8×104 up to 8×105 g·mol–1 dissolved in phosphate buffer at 0.13 M ionic strength were used. It was found that the Mark–Houwink relation is acceptably obeyed, giving K and a values of 1.84×10–6 dL·g–1 and 1.16, respectively. As expected, GPC analysis showed that PGGA does not follow the universal calibration plot and that deviations can not be avoided by modifying the ionic strength.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2001-11-01 | Macromolecular Chemistry and Physics |