Non-Linear Rheological Properties and Neutron Scattering Investigation on Dilute Ring-Linear Blends

W. Pyckhout-Hintzen, A.R. Bras, A. Wischnewski, D. Richter, Qian Huang, Ole Hassager, D. Vlassopoulos, R. Pasquino, M. Rubinstein

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Linear and non-linear Rheology on dilute blends of polystyrene ring polymers in linear matrix is combined with
Small Angle Neutron Scattering (SANS) investigations. In this way 2 different entanglement interactions become
clear. After stretching the samples to different hencky strains up to 2 in a filament stretching rheometer, followed
by quenching, strong anisotropic scattering patterns were obtained which were described by affinely deformed
rings which function as giant, polymeric chemical crosslinks or sliplinks and more or less isotropic topological
contributions from the entangling with interpenetrating linear chains. At the same time the non-linear rheological
and mechanical data fit to a non-affine slip-tube model as for moderately crosslinked networks and to interchain
pressure models or a modified non-linear Doi-Edwards description for the observed strain hardening during the
extensional rheology. The entangled situation is thought to be responsible for the different terminal behaviour
observed in ring polymers with traces of linear impurities. A comparison with a dilute blend of a linear chain of the
same size as the ring polymer in the longer matrix is made.
Original languageEnglish
Publication date2012
Publication statusPublished - 2012
Event16th International Congress on Rheology: Symposium "Advanced Experimental Methods" - Lisbon, Portugal
Duration: 5 Aug 201210 Aug 2012
Conference number: 16


Conference16th International Congress on Rheology
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