Viscoelasticity of Concentrated Isotropie Solutions of Semifiexible Polymers. 3. Nonlinear Rheology

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Abstract

Nonlinear Theological properties of a tightly-entangled solution of persistent macromolecules are calculated within the context of a tube model. It is shown that the curvature stress in highly deformed solutions of such chains is dominated by the contributions of deformation-induced "hairpins", i.e., rare but very tightly curved segments of the deformed chain conformations. The model is found to exhibit strain softening in shear deformations.

Original languageEnglish (US)
Pages (from-to)5934-5943
Number of pages10
JournalMacromolecules
Volume32
Issue number18
StatePublished - Sep 7 1999

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