Foaming of Miscible and Immiscible Polymer Blends

Titelangaben

Ruckdäschel, Holger ; Rausch, Julius ; Sandler, Jan K. W. ; Altstädt, Volker ; Schmalz, Holger ; Müller, Axel H. E.:
Foaming of Miscible and Immiscible Polymer Blends.
In: MRS Online Proceedings Library. Bd. 977 (2006) . - 1404.
ISSN 1946-4274
DOI: https://doi.org/10.1557/PROC-977-0977-FF14-04

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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.