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Foaming of Miscible and Immiscible Polymer Blends

Published online by Cambridge University Press:  26 February 2011

Holger Ruckdaeschel
Affiliation:
holger.ruckdaeschel@uni-bayreuth.de, University of Bayreuth, Polymer Engineering, Universitaetsstrasse 30, Bayreuth, 95447, Germany
Julius Rausch
Affiliation:
julius.rausch@uni-bayreuth.de, University of Bayreuth, Polymer Engineering, Universitaetsstrasse 30, Bayreuth, 95447, Germany
Jan K.W. Sandler
Affiliation:
jan.sandler@uni-bayreuth.de, University of Bayreuth, Polymer Engineering, Universitaetsstrasse 30, Bayreuth, 95447, Germany
Volker Altstaedt
Affiliation:
altstaedt@uni-bayreuthd.e, University of Bayreuth, Polymer Engineering, Universitaetsstrasse 30, Bayreuth, 95447, Germany
Holger Schmalz
Affiliation:
holger.schmalz@uni-bayreuth.de, University of Bayreuth, Macromolecular Chemistry II, Universitaetsstrasse 30, Bayreuth, 95447, Germany
Axel H.E. Mueller
Affiliation:
axel.mueller@uni-bayreuth.de, University of Bayreuth, Macromolecular Chemistry II, Universitaetsstrasse 30, Bayreuth, 95447, Germany
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Abstract

Batch-foaming of miscible, immiscible and compatibilized polymer blend systems over a wide compositional range was carried out using carbon dioxide as a physical blowing agent. The resulting foam morphology was characterized by a detailed evaluation of foam density as well as of the cellular parameters. With regard to multiphase blends, transmission electron microscopic observations further provided a detailed insight into the cell wall morphology. The role of the melt-elongational properties and of the glass transition behavior of the various blend systems on the foaming characteristics was systematically elucidated. While the miscible blends showed a simple additivity behavior with regard to their foaming characteristics and properties, a significant influence of the initial blend morphology is demonstrated for the multiphase blends.

Type
Research Article
Copyright
Copyright © Materials Research Society 2007

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