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Extrusion Foaming of a Preceramic Silicone Resin with a Variety of Profiles and Morphologies
Author(s) -
Wolff Friedrich,
Ceron Nicolat Bruno,
Fey Tobias,
Greil Peter,
Münstedt Helmut
Publication year - 2012
Publication title -
advanced engineering materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.938
H-Index - 114
eISSN - 1527-2648
pISSN - 1438-1656
DOI - 10.1002/adem.201100351
Subject(s) - materials science , extrusion , composite material , foaming agent , silicone , plastics extrusion , blowing agent , ceramic , fabrication , ceramic foam , rod , polymer , silicone resin , porosity , polyurethane , medicine , alternative medicine , pathology , coating
Preceramic foams with a variety of profiles and morphologies were fabricated by a continuous foam extrusion process based on a single‐screw extruder. A methyl silicone resin was used as the preceramic polymer and carbon dioxide as the foaming agent. Variations of the foam morphology were achieved by changing the key process parameters carbon dioxide content, foaming pressure, and foaming temperature. Samples of different porosities, cell densities, pore sizes, and pore size gradients were obtained. From these results, conditions for the fabrication of particular foam structures can be derived. Various foam profiles as rods, tapes, and tubes were extruded and pyrolysed into ceramic foams.