McLeish, Tom and Ball, Robin. (1986) A molecular approach to the spurt effect in polymer melt flow. Journal of Polymer Science Part B: Polymer Physics, Vol.24 (No.8). pp. 1735-1745. ISSN 0887-6266

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Abstract

The Doi-Edwards theory of polymer melts, extended to include relaxation processes associated with chain-length equilibration, is used to make quantitative predictions of a discontinuity in the flow curve of a monodisperse melt in a capillary. A fluid interface between regions of high and low deformation rates is found to propagate from the former into the latter. Our results for the “spurt” and its hysteresis compare favorably with experiment using a molecular weight dependence of the ratio of “reptation time” (Td) to “equilibration time” (Teq) in agreement with that determined from nonlinear stress relaxation.

Item Type:	Journal Article
Subjects:	Q Science > QC Physics T Technology > TP Chemical technology
Divisions:	Faculty of Science > Physics
Library of Congress Subject Headings (LCSH):	Polymer melting, Stress relaxation, Deformations (Mechanics), Molecular weights
Journal or Publication Title:	Journal of Polymer Science Part B: Polymer Physics
Publisher:	John Wiley & Sons, Inc.
ISSN:	0887-6266
Official Date:	1986
Dates:	Date Event 1986 Published
Volume:	Vol.24
Number:	No.8
Page Range:	pp. 1735-1745
Identification Number:	10.1002/polb.1986.090240809
Status:	Peer Reviewed
Publication Status:	Published
Access rights to Published version:	Restricted or Subscription Access
URI:	http://wrap.warwick.ac.uk/id/eprint/39411

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