Journal article
Unexpected Stretching of Entangled Ring Macromolecules
The Danish Polymer Centre, Department of Chemical and Biochemical Engineering, Technical University of Denmark1
Department of Chemical and Biochemical Engineering, Technical University of Denmark2
Pohang University of Science and Technology3
Foundation for Research and Technology-Hellas4
Russian Academy of Sciences5
Duke University6
In the melt state at equilibrium, entangled nonconcatenated ring macromolecules adapt more compact conformations compared to their linear analogs and do not form an entanglement network. We show here that, when subjected to uniaxial stretching, they exhibit a unique response, which sets them apart from any other polymer.
Remarkably, whereas both linear and ring polymers strain-harden, the viscosity of the rings increases dramatically (the melt thickens) at very low stretch rates due to the unraveling of their conformations along the stretching direction. At high rates, stretching leads to viscosity thinning similar to that of entangled linear polymers, albeit with subtle differences.
Language: | English |
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Year: | 2019 |
Pages: | 208001 |
ISSN: | 10797114 and 00319007 |
Types: | Journal article |
DOI: | 10.1103/PhysRevLett.122.208001 |
ORCIDs: | Huang, Q. and Hassager, O. |