The hydrodynamic behaviour of amylose tricarbanilate in dilute solution. IV. A comparison of experimental and calculated coil dimensions for amylose tricarbanilate in a pyridine/water theta‐solvent

Hydrodynamic measurements on amylose tricarbanilate fractions in a pyridine/water theta‐mixture have been used to provide a test of theoretical treatments of limiting viscosity number and frictional coefficient which have been developed on the basis of the partial free‐draining model. Coil dimensions have been calculated using the theories of BRINKMAN‐DEBYE‐BUECHE, KIRKWOOD‐RISEMAN, KUHN‐KUHN‐SILBERBERG, and of PETERLIN, and these have been compared with the experimental values. Only the treatment of KUHN‐KUHN‐SILBERBERG gives reasonable agreement between the experimental parameters and those calculated from both viscosity and sedimentation data.