Rheological Behavior of Coextruded Multilayer Architectures
Utilizing a thermoplastic extrusion process, a multilayered architecture was fabricated. Thermoplastic blends of 55 vol% X7R dielectric and 50 vol% nickel powder were prepared by high shear mixing. Sheets pressed from this material were cut, stacked, and laminated to produce multilayered blocks. The blocks were extruded through a slotted spinneret to reduce layer thickness. The relation between viscosity and shear rate is relatively well understood for two- or three-layered polymer coextrusion. This behavior has not been studied for heavily loaded multi-component systems, such as might be used for MLCCs and other multilayered devices. A correlation was observed between the flow behavior during extrusion and that observed during mixing. Results show how control of the rheological behavior of highly loaded systems can control extrusion defects.
D. R. Beeaff and G. Hilmas, "Rheological Behavior of Coextruded Multilayer Architectures," Journal of Materials Science, vol. 37, no. 6, pp. 1259-1264, Springer Netherlands, Mar 2002.
The definitive version is available at http://dx.doi.org/10.1023/A:1014392111303
Materials Science and Engineering
Keywords and Phrases
Coextrusion; Mixing; Multilayers; Particle size analysis; Powders; Rheology; Viscosity; Multilayer architectures; Thermoplastics
International Standard Serial Number (ISSN)
Article - Journal
© 2002 Springer Netherlands, All rights reserved.