Journal Article10.1002/POL.1959.1203713102
Dynamics of branched polymer molecules in dilute solution
Bruno H. Zimm,Ralph W. Kilb +1 more
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TL;DR: In this paper, the intrinsic viscosity and viscoelastic properties of branched molecules in dilute solution are calculated by means of the normal coordinate method of Rouse modified to include hydrodynamic interactions.
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Abstract: Theoretical formulas for the intrinsic viscosity and viscoelastic properties of some model branched molecules in dilute solution are calculated by means of the normal coordinate method of Rouse modified to include hydrodynamic interactions. The calculations are exact except for the usual approximation of the hydrodynamic interaction by the Kirkwood-Riseman formula. The ratio of the intrinsic viscosity of a branched molecule to that of a linear molecule of the same weight is found to vary almost as the square root of the ratio of the mean square radii, instead of as the latter ratio to three-halves power, as has been postulated before. It is proposed that this square root relation is applicable in general to branched molecules of all types. Several sets of experimental data in the literature are shown to agree well with this hypothesis.
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Citations
Polyolefins Formed by Chain Walking Catalysis-A Matter of Branching Density Only?
Ron Dockhorn,Laura Plüschke,Laura Plüschke,Martin Geisler,Martin Geisler,Johanna Zessin,Johanna Zessin,Peter Lindner,Robert Mundil,Jan Merna,Jens-Uwe Sommer,Jens-Uwe Sommer,Albena Lederer,Albena Lederer +13 more
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