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Rheological Link Between Polymer Melts with a High Molecular Weight Tail and Enhanced Formation of Shish-Kebabs

Wingstrand, Sara L. and Shen, Bo and Kornfield, Julia A. and Mortensen, Kell and Parisi, Daniele and Vlassopoulos, Dimitris and Hassager, Ole (2017) Rheological Link Between Polymer Melts with a High Molecular Weight Tail and Enhanced Formation of Shish-Kebabs. ACS Macro Letters, 6 (11). pp. 1268-1273. ISSN 2161-1653. https://resolver.caltech.edu/CaltechAUTHORS:20171101-114633022

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Abstract

Presence of an ultra high molecular weight (UHMw) fraction in flowing polymer melts is known to facilitate formation of oriented crystalline structures significantly. The UHMw fraction manifests itself as a minor tail in the molar mass distribution and is hardly detectable in the canonical characterization methods. In this study, alternatively, we demonstrate how the nonlinear extensional rheology reveals to be a very sensitive characterization tool for investigating the effect of the UHMw-tail on the structural ordering mechanism. Samples containing a UHMw-tail relative to samples without, exhibit a clear increase in extensional stress that is directly correlated with the crystalline orientation of the quenched samples. Extensional rheology, particularly, in combination with linear creep measurements, thus, enables the conformational evolution of the UHMw-tail to be studied and linked to the enhanced formation of oriented structures.


Item Type:Article
Related URLs:
URLURL TypeDescription
https://doi.org/10.1021/acsmacrolett.7b00718DOIArticle
http://pubs.acs.org/doi/abs/10.1021/acsmacrolett.7b00718PublisherArticle
http://pubs.acs.org/doi/suppl/10.1021/acsmacrolett.7b00718PublisherSupporting Information
ORCID:
AuthorORCID
Wingstrand, Sara L.0000-0002-4555-4571
Kornfield, Julia A.0000-0001-6746-8634
Hassager, Ole0000-0003-2695-6791
Additional Information:© 2017 American Chemical Society. Received: September 15, 2017; Accepted: October 26, 2017; Publication Date (Web): October 31, 2017. The authors thank Aage og Johanne Louis-Hansen fonden for financial support. Furthermore, we thank Qian Huang and Prof. Nicolas J. Alvarez for fruitful discussions on the work. The authors declare no competing financial interest.
Funders:
Funding AgencyGrant Number
Aage og Johanne Louis-Hansen fondenUNSPECIFIED
Issue or Number:11
Record Number:CaltechAUTHORS:20171101-114633022
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20171101-114633022
Official Citation:Rheological Link Between Polymer Melts with a High Molecular Weight Tail and Enhanced Formation of Shish-Kebabs. Sara L. Wingstrand, Bo Shen, Julie A. Kornfield, Kell Mortensen, Daniele Parisi, Dimitris Vlassopoulos, and Ole Hassager. ACS Macro Letters 2017 6 (11), 1268-1273. DOI: 10.1021/acsmacrolett.7b00718
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:82831
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:01 Nov 2017 19:45
Last Modified:03 Oct 2019 18:59

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