Fatty Acid Surfactant Structure–Feedstock Flow Properties: Correlation for High‐Pressure Ceramic Injection Molding
Abstract:The effect of four different fatty acids on the rheological behavior of polyethylene–paraffin–zirconia feedstocks was investigated systematically. The substitution of a small portion of the low‐viscous paraffin by the fatty acid does not alter the binder viscoelastic flow characteristics. At high solid loads (50 and 55 vol%), the addition of small amounts of fatty acid surfactants causes a significant influence on the feedstocks flow properties. An optimized surfactant concentration around 2.2 mg/m2 fillers' specific surface area could be estimated. From melt rheology experiments, a clear correlation between the fatty acid molecular extension and resulting feedstock viscosity could be derived.
Document Type: Research Article
Affiliations: 1: Karlsruhe Institute for Technology, Institute for Materials Research III, Hermann-von-Helmholtz-Platz 1, D-76344 Eggenstein-Leopoldshafen, Germany 2: Department of Microsystems Engineering, University of Freiburg, Georges-Koehler-Allee 102, D-79110 Freiburg, Germany
Publication date: November 1, 2011