Viscosity predictions for model miscible polymer blends: Including self-concentration, double reptation, and tube dilation

Jeffrey C. Haley, Timothy P. Lodge

Research output: Contribution to journalArticlepeer-review

16 Scopus citations

Abstract

The viscosities of miscible blends of 1,4-polyisoprene (Mn =78 kgmol) /poly(vinylethylene) (Mn =10 kgmol and 120 kgmol) and polystyrene (Mn =30 kgmol) /poly(vinyl methyl ether) (Mn =105 kgmol) were measured as a function of temperature and composition. These results, along with literature data for poly(ethylene-alt-propylene)/head-to-head polypropylene [Gell (1996)] and molecular weight blends of 1,4-polybutadiene [Wang (2003)], were compared to the predictions of a previously published model [Haley and Lodge (2004a)]. The agreement between theory and experiment is generally good, though some quantitative discrepancies are apparent. A new tube dilation model that predicts the terminal relaxation time of the slower moving component in a blend as a function of composition is presented. This model enables improved viscosity predictions, and in several cases produces near quantitative predictions.

Original languageEnglish (US)
Article number002506JOR
Pages (from-to)1277-1302
Number of pages26
JournalJournal of Rheology
Volume49
Issue number6
DOIs
StatePublished - 2005

Bibliographical note

Funding Information:
The authors thank Stephanie Oehlke for fractionating the PVME sample, Phyllis Ukatu for assisting with measurements on the PS/PVME blends, and Hiroshi Watanabe for helpful suggestions for the tube dilation model. This work was supported by the National Science Foundation, through Award Nos. DMR-9901087 and DMR-0406656, and by the Graduate School of the University of Minnesota, through a Doctoral Dissertation Fellowship (J.C.H.).

Keywords

  • Blends
  • Constitutive equations
  • Viscosity

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