Configurational Microphase Separation in Elongational Flow of an Entangled Polymer Liquid

Mohammad H. Nafar Sefiddashti, Brian J. Edwards, and Bamin Khomami
Phys. Rev. Lett. 121, 247802 – Published 14 December 2018
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Abstract

Manufacturing of plastics is typically performed via flow processing of a molten polymeric fluid. Until recently, conventional knowledge has maintained that the deformation of the constituent molecules under flow is homogeneous and obeys Gaussian statistics. In this study via virtual experimentation, an entangled polyethylene melt subjected to planar elongational flow displays an unanticipated microphase separation into a heterogeneous liquid composed of regions of either highly stretched or tightly coiled macromolecules, thus providing a natural realization of a biphasic coil-stretch transition.

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  • Received 22 August 2018

DOI:https://doi.org/10.1103/PhysRevLett.121.247802

© 2018 American Physical Society

Physics Subject Headings (PhySH)

Polymers & Soft Matter

Authors & Affiliations

Mohammad H. Nafar Sefiddashti, Brian J. Edwards*, and Bamin Khomami

  • Department of Chemical and Biomolecular Engineering, Materials Research and Innovation Laboratory, University of Tennessee, Knoxville, Tennessee 37996, USA

  • *Corresponding author. bje@utk.edu
  • Corresponding author. bkhomami@utk.edu

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Issue

Vol. 121, Iss. 24 — 14 December 2018

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