Swelling pressure equilibrium of swollen crosslinked systems in an external field. II: The determination of molecular parameters of gelatin/water gels from the swelling pressure-concentration curves
作者： -G. Holtus , H. Cölfen , W. Borchard
DOI: 10.1007/BFB0115012
关键词:
摘要: Physically crosslinked watery gels of a dialyzed pigskin gelatin type A are investigated by means equilibrium runs at 10 and 20°C. From the data Schlieren patterns swelling pressure-concentration curves can be calculated. It shown that equilibria achieved in all cases pressure which is calculated for given concentration independent rotational speed selected experiment if other conditions kept constant. The results described equation Flory-Huggins where interaction paramter x allowed to depend linearly on polymer concentration. Thus, two constants network parameter have been each nonlinear numerical iteration due Gauss-Jordan procedure. With these well described. x-parameter low initial very close value has experimentally determined solutions highly diluted range above coil-helix transition range. Both x-values reveal influence branched structure network. elastic modulus nearly same order magnitude as obtained from real part complex shear gel.
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