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  • 1985-1989  (2)
  • 1955-1959  (1)
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  • 1
    Electronic Resource
    Electronic Resource
    Dependence of viscoelastic flow functions on molecular structure for linear and branched polymers (1985)
    s.l. : American Chemical Society
    Macromolecules 18 (1985), S. 695-699 
    Details
    ISSN: 1520-5835
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ma00146a021
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Pipe-line design for non-newtonian fluids in streamline flow (1955)
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 1 (1955), S. 544-548 
    Details
    ISSN: 0001-1541
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: A method is presented for determining the flow-rate - pressure-gradient relationship for the streamline flow of the large class of non-Newtonian, nonthixotropic fluids to which the Powell-Eyring equation applies. The general procedure and assumptions required in developing this method are the same as used in deriving the Hagen-Poiseuille equation except that the Powell-Eyring equation is used in place of Newton's equation to relate shear stress to shear rate.The method can be used to predict pipe-flow pressure gradients from both precision viscometer data and pipe-flow data. Its applicability is demonstrated for three typical non-Newtonian fluids, 3% carboxymethylcellulose in water, 15% napalm in kerosene, and 33% hydrated lime in water.When used with pipe-flow data, it resembles the method of Alves and associates, compensating for the inconvenience of an additional step in calculation procedure by providing a means of extrapolating beyond the range of the experimental data.The relationships developed facilitate the application of shear-stress - shear-rate data in the design of conduits for non-Newtonian fluids.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aic.690010427
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    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    The dependence of viscoelastic flow functions on polymer structure for linear and branched polystyrene and polybutadiene (1985)
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 31 (1985), S. 1621-1631 
    Details
    ISSN: 0001-1541
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Experimentally determined viscosities, first and second normal stress differences, and compliances for concentrated solutions of linear and four-arm star-branched polystyrenes and polybutadienes depend on the shear rate and the molecular weight, in agreement with theory and previously reported experimental results. The ratios of the second to first normal stress difference are -0.29 and -0.214 for the linear and branched polymers, respectively, independent of molecular weight, molecular weight distribution, concentration, and shear rate.
    Additional Material: 11 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aic.690311006
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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