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Rheology pp 301-301 | Cite as

Broad Shear Range Viscometry of High Polymer Solutions: Polystyrene and Polyisobutene in Decalin

  • T. Shimida
  • P. L. Horng
  • R. S. Porter

Abstract

The flow behavior at 25°C for decalin solutions of polystyrenes (PS) of molecular weights up to 7 x 106 and polyisobutenes (PIB) of molecular weights up to 3 x 106 was examined over a wide range of shear rate up to about 105 sec-1 for several polymer concentr: ations. Measurements involved conventional glass capillary viscometers, a Rheometric Mechanical Spectrometer, and custombuilt high-shear concentric cylinder viscometer. Low shear Newtonian viscosities for the higher concentration entanglement region follow the forms η0 = CM0.57 for PS and η0 = CM0-68 for PIB. Gel permeation chromatography was used to determine polymer molecular weight, its distribution, and possible change on shearing. Shear degradation was observed for polymers at high values of concentration, molecular weight, and shear stress.

Keywords

Molecular Weight Shear Stress Shear Rate Research Laboratory Polymer Solution 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Copyright information

© Springer Science+Business Media New York 1980

Authors and Affiliations

  • T. Shimida
    • 1
  • P. L. Horng
    • 1
  • R. S. Porter
    • 1
  1. 1.Department of Polymer Science and Engineering, Materials Research LaboratoryThe University of MassachusettsUSA

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