Dynamics of Star Polymers in Fast Extensional Flow and Stress Relaxation

Huang, Qian; Agostini, Serena; Hengeller, Ludovica; Shivokhin, Maksim; Alvarez, Nicolas J.; Hutchings, Lian R.; Hassager, Ole

doi:10.1021/acs.macromol.6b01348

Dynamics of Star Polymers in Fast Extensional Flow and Stress Relaxation

Huang, Qian; Agostini, Serena; Hengeller, Ludovica; Shivokhin, Maksim; Alvarez, Nicolas J.; Hutchings, Lian R.; Hassager, Ole

Authors

Qian Huang

Serena Agostini

Ludovica Hengeller

Maksim Shivokhin

Nicolas J. Alvarez

Lian Hutchings l.r.hutchings@durham.ac.uk
Academic Visitor

Ole Hassager

Abstract

We confirm the observation from Ianniruberto and Marrucci [ Macromolecules 2013, 46, 267−275] that entangled melts of branched polystyrenes behave like linear polystyrenes in the steady state of fast extensional flow, by measuring a linear, an asymmetric star, and a symmetric star polystyrene with the same span molecular weight (180 kg/mol). We show that all three melts reach the same extensional steady-state viscosity in fast extensional flow (faster than the inverse Rouse time). We further measure stress relaxation following steady extensional flow for the three melts. We show that initially they relax in a similar way, most likely via arm retraction, at short time, but behave differently at long time due to both the length of the arm and the branch point. The terminal relaxation is described by a Doi and Edwards based model, i.e., considering pure orientational relaxation.

Citation

Huang, Q., Agostini, S., Hengeller, L., Shivokhin, M., Alvarez, N. J., Hutchings, L. R., & Hassager, O. (2016). Dynamics of Star Polymers in Fast Extensional Flow and Stress Relaxation. Macromolecules, 49(17), 6694-6699. https://doi.org/10.1021/acs.macromol.6b01348

Journal Article Type	Article
Acceptance Date	Jun 23, 2016
Online Publication Date	Aug 15, 2016
Publication Date	Aug 15, 2016
Deposit Date	Nov 27, 2017
Publicly Available Date	Jul 26, 2019
Journal	Macromolecules
Print ISSN	0024-9297
Electronic ISSN	1520-5835
Publisher	American Chemical Society
Peer Reviewed	Peer Reviewed
Volume	49
Issue	17
Pages	6694-6699
DOI	https://doi.org/10.1021/acs.macromol.6b01348

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Copyright Statement
This document is the Accepted Manuscript version of a Published Work that appeared in final form in Macromolecules, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see https://doi.org/10.1021/acs.macromol.6b01348