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Journal article
Stress relaxation of bi-disperse polystyrene melts
Rheologica acta, v 55(4), pp 303-314
01 Apr 2016
Abstract
We present start-up of uniaxial extension followed by stress relaxation experiments of a bi-disperse 50 % by weight blend of 95k and 545k molecular weight polystyrene. We also show, for comparison, stress relaxation measurements of the polystyrene melts with molecular weight 95k and 545k, which are the components of the bi-disperse melt. The measurements show three separated relaxation regimes: a fast regime, a transition regime, and a slow regime. In the fast regime, the orientation of the long chains is frozen and the stress relaxation is due to stretch relaxation of the short chains primarily. Conversely in the slow regime, the long chains have retracted and undergo relaxation of orientation in fully relaxed short chains.
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Details
- Title
- Stress relaxation of bi-disperse polystyrene melts
- Creators
- Ludovica Hengeller - Technical University of DenmarkQian Huang - Technical University of DenmarkAndriy Dorokhin - Technical University of DenmarkNicolas J. Alvarez - Drexel UniversityKristoffer Almdal - Technical University of DenmarkOle Hassager - Technical University of Denmark
- Publication Details
- Rheologica acta, v 55(4), pp 303-314
- Publisher
- Springer Nature
- Number of pages
- 12
- Grant note
- 0602-02179B / Danish Council for Independent Research - Natural Sciences under EPMEF Aage og Johanne Louis-Hansens Fond
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Chemical and Biological Engineering
- Web of Science ID
- WOS:000373160800004
- Scopus ID
- 2-s2.0-84961602266
- Other Identifier
- 991019167924804721
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- Collaboration types
- Domestic collaboration
- International collaboration
- Web of Science research areas
- Mechanics