Rheology pp 419-424 | Cite as

Stresses and Recoverable Strains of Stretched Polymer Melts and Their Prediction by Means of a Single Integral Constitutive Equation

  • Hans Martin Laun


The elongational behaviour of various polymer melts was measured by means of an elongational rheometer using a rotating clamp1,2. The servo control makes it possible to apply varying or constant stresses or strain rates (Fig. 1). The recoverable strain and the quality of the test is determined from three cut-offs.


Strain Rate Dependence Servo Control Elongational Viscosity Recoverable Strain Viscosity Function 
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Copyright information

© Springer Science+Business Media New York 1980

Authors and Affiliations

  • Hans Martin Laun
    • 1
  1. 1.Mess- und PrüflaboratoriumBASF AktiengesellschaftLudwigshafen/RheinGermany

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