Rheology pp 431-436 | Cite as

Large Homogeneous Biaxial Extension of Polyisobutylene and Comparison with Uniaxial Behaviour

  • S. E. Stephenson
  • J. Meissner


Compared with the activity during the last decade in uniaxial extension of polymer melts, the investigation of their biaxial behaviour has been rather limited because of experimental difficulties. In a previous paper /1/, a new type of biaxial rheometer has been described, which has distinct advantages over the conventional bubble inflation technique. Using this new rheometer, equibiaxial extensional experiments on polyisobutylene at room temperature (22°C) and constant strain rates have been made. The results of these experiments are compared with the response of the same material in uniaxial extension and simple shear.


Constant Strain Rate Radial Strain Uniaxial Extension HENCKY Strain Nominal Strain Rate 
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  1. 1/.
    J. Meissner, T. Raible and S.E. Stephenson, paper presented at the Golden Jubilee Meeting of the Society of Rheolo-gy, Boston, Mass. 1979. J. of Rheol., to be published.Google Scholar
  2. 2/.
    Technical Information Sheet, BASF AktiengesellschaftGoogle Scholar
  3. 3/.
    J.M. Maerker and W.R. Schowalter, Rheol. Acta 13, 627–638 (1974)CrossRefGoogle Scholar
  4. 4/.
    J.L. White, Rheol. Acta 14, 600–611 (1975)MATHCrossRefGoogle Scholar

Copyright information

© Springer Science+Business Media New York 1980

Authors and Affiliations

  • S. E. Stephenson
    • 1
  • J. Meissner
    • 1
  1. 1.Department of Industrial and Engineering ChemistrySwiss Federal Institute of Technology (ETHZ)ZürichSwitzerland

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