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Fatty Acid Surfactant Structure–Feedstock Flow Properties: Correlation for High‐Pressure Ceramic Injection Molding
Author(s) -
Hanemann Thomas,
Heldele Richard
Publication year - 2011
Publication title -
international journal of applied ceramic technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.4
H-Index - 57
eISSN - 1744-7402
pISSN - 1546-542X
DOI - 10.1111/j.1744-7402.2011.02612.x
Subject(s) - materials science , rheology , raw material , pulmonary surfactant , viscosity , molding (decorative) , ceramic , chemical engineering , fatty acid , composite material , viscoelasticity , organic chemistry , chemistry , engineering
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/m 2 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.