Numerical prediction of nonlinear rheology of branched polymer melts

C. Das, D.J. Read, D. Auhl, M. Kapnistos, C.F.J. Den Doelder, I. Vittorias, T.C.B. McLeish

Research output: Contribution to journalArticleAcademicpeer-review

22 Citations (Scopus)

Abstract

In a recent short communication [Read, D. J. et al., Science 333, 1871 (2011)], we showed that a computational scheme can describe the nonlinear flow properties for a series of industrial low-density polyethylene (LDPE) resins starting from the molecular architecture. The molecular architecture itself is determined by fitting parameters of a reaction kinetics model to average structural information obtained from gel-permeation chromatography and light scattering. Flow responses of these molecules in transient uniaxial extension and shear are calculated by mapping the stretch and orientation dynamics of the segments within the molecules to effective pom-pom modes. In this paper, we provide the details of the computational scheme and present additional results on a LDPE and a high-density polyethylene resin to illustrate the dependence of segmental maximum stretch variables on the flow rate.

Original languageEnglish
Pages (from-to)737-757
Number of pages21
JournalJournal of Rheology
Volume58
Issue number3
DOIs
Publication statusPublished - 2014
Externally publishedYes

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  • Cite this

    Das, C., Read, D. J., Auhl, D., Kapnistos, M., Den Doelder, C. F. J., Vittorias, I., & McLeish, T. C. B. (2014). Numerical prediction of nonlinear rheology of branched polymer melts. Journal of Rheology, 58(3), 737-757. https://doi.org/10.1122/1.4869485