Take a sneak peek at the new NIST.gov and let us know what you think!
(Please note: some content may not be complete on the beta site.).

View the beta site
NIST logo

Publication Citation: A Dielectric Slit Die for In-Line Monitoring of Polymer Compounding

NIST Authors in Bold

Author(s): Anthony J. Bur; S C. Roth; M M. McBrearty;
Title: A Dielectric Slit Die for In-Line Monitoring of Polymer Compounding
Published: April 01, 2004
Abstract: The dielectric slit die is an instrument that is designed to measure electrical, rheological, ultrasonics, optical and other properties of a flowing liquid. In one application it is connected to the exit of an extrudder, pump or mixing machine that passes liquefied material such as molten plastics, solvents, slurries, colloidal suspensions and foodstuffs into the sensing region of slit shaped die. Dielectric sensing is the primary element of the slit die, but in addition to the dielctric sensor, the die contains other sensing devices such as pressure, optical and ultrasonics sensors.The slit die has a flexible design that permits interchangability among sensors and sensor positions. To demonstrate sensor operation, we present data from extrusion and compounding of a polymer/clay nanocomposite.
Citation: Review of Scientific Instruments
Volume: 75
Issue: No. 4
Keywords: dielectric properties,microstructure,nanocomposites,nylon 12,optical sensor,polyamide,process monitoring
Research Areas: Processing, Polymers
PDF version: PDF Document Click here to retrieve PDF version of paper (295KB)