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Multilayer Coextrusion of Polymer Composites to Develop Organic Capacitors

Journal Article · · International Polymer Processing
DOI:https://doi.org/10.3139/217.2872· OSTI ID:1110496
 [1];  [2];  [1];  [2];  [1];  [1];  [1];  [1];  [1];  [1];  [1]
  1. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
  2. U.S. Army Research Lab., Aberdeen, MD (United States)
+ Show Author Affiliations
Multilayer coextrusion is applied to produce a tape containing layers of alternating electrical properties to demonstrate the potential for using coextrusion to manufacture capacitors. To obtain the desired properties, we develop two filled polymer systems, one for conductive layers and one for dielectric layers. We describe numerical models used to help determine the material and processing parameters that impact processing and layer stability. These models help quantify the critical ratios of densities and viscosities of the two layers to maintain stable layers, as well as the effect of increasing the flow rate of one of the two materials. The conducting polymer is based on polystyrene filled with a blend of low-melting-point eutectic metal and nickel particulate filler, as described by Mrozek et al. (2010). The appropriate concentrations of fillers are determined by balancing measured conductivity with processability in a twin screw extruder. Based on results of the numerical models and estimates of the viscosity of emulsions and suspensions, a dielectric layer composed of polystyrene filled with barium titanate is formulated. Despite the fact that the density of the dielectric filler is less than the metallic filler of the conductive phase, as well as rheological measurements that later showed that the dielectric formulation is not an ideal match to the viscosity of the conductive material, the two materials can be successfully coextruded if the flow rates of the two materials are not identical. A measurable capacitance of the layered structure is obtained.
Research Organization:
Sandia National Laboratories (SNL-NM), Albuquerque, NM (United States)
Sponsoring Organization:
USDOE National Nuclear Security Administration (NNSA)
Grant/Contract Number:
AC04-94AL85000
OSTI ID:
1110496
Report Number(s):
SAND--2013-7671J; 473907
Journal Information:
International Polymer Processing, Journal Name: International Polymer Processing Journal Issue: 2 Vol. 30; ISSN 0930-777X
Publisher:
HanserCopyright Statement
Country of Publication:
United States
Language:
English

References (38)

Sheet coextrusion of polymer solutions and melts: Comparison between simulation and experiments journal September 1993
Stratified two-phase flow of molten polymers journal April 1973
A study of bicomponent coextrusion of molten polymers journal April 1973
Electrical conductivity modeling of carbon black/polycarbonate, carbon nanotube/polycarbonate, and exfoliated graphite nanoplatelet/polycarbonate composites journal October 2011
A level set method to study foam processing: a validation study: A LEVEL SET METHOD TO STUDY FOAM PROCESSING: A VALIDATION STUDY journal September 2011
Rheology and morphology of multilayer reactive polymers: effect of interfacial area in interdiffusion/reaction phenomena journal January 2008
High dielectric constant polymer-ceramic (Epoxy varnish-barium titanate) nanocomposites at moderate filler loadings for embedded capacitors journal November 2006
Transport characteristics of suspension: VIII. A note on the viscosity of Newtonian suspensions of uniform spherical particles journal March 1965
An experimental investigation of interfacial instabilities in multilayer flow of viscoelastic fluids journal December 1992
Multilayer bender-type PZT-PZN actuator by co-extrusion process journal January 2006
Convective linear stability analysis of two-layer coextrusion flow for molten polymers journal August 2004
Numerical investigations of polyester coextrusion instabilities journal May 2013
Structure and properties of electrically conducting composites consisting of alternating layers of pure polypropylene and polypropylene with a carbon black filler journal October 2008
Highly conductive, melt processable polymer composites based on nickel and low melting eutectic metal journal June 2010
Development of a dispersion process for carbon nanotubes in an epoxy matrix and the resulting electrical properties journal October 1999
Instability due to viscosity stratification journal February 1967
The constitutive equation for a dilute emulsion journal October 1970
Stability of symmetric film-splitting between counter-rotating cylinders journal July 1990
Selective Interfacial Reaction between Ni and Eutectic BiSn Lead-Free Solder journal February 2001
Graphene/Polymer Nanocomposites journal August 2010
Transient two-layer thin-film flow inside a channel journal August 2011
Colloidal processing of polymer ceramic nanocomposite integral capacitors journal April 2003
Influence of Stearic Acid Concentration on the Processing of ZrO2-Containing Feedstocks Suitable for Micropowder Injection Molding journal April 2010
Slip at polymer–polymer interfaces: Rheological measurements on coextruded multilayers journal January 2002
On the mechanism of viscoelastic encapsulation of fluid layers in polymer coextrusion journal March 2014
A Mechanism for Non‐Newtonian Flow in Suspensions of Rigid Spheres journal March 1959
Prediction of the Viscosity of Multimodal Suspensions from Unimodal Viscosity Data journal July 1968
Ultrafine ceramic powder injection moulding: The role of dispersants journal January 1996
Viscous behavior and mixing rules for an immiscible model polymer blend journal January 2000
Folding flexible co-extruded all-polymer multilayer distributed feedback films to control lasing journal June 2012
Convective Instabilities in the Coextrusion Process journal May 2001
Development of a dispersion process for carbon nanotubes in an epoxy matrix and the resulting electrical properties journal October 1999
Instability due to viscosity stratification journal February 1967
The constitutive equation for a dilute emulsion journal October 1970
Stability of symmetric film-splitting between counter-rotating cylinders journal July 1990
Transient two-layer thin-film flow inside a channel journal August 2011
Colloidal processing of polymer ceramic nanocomposite integral capacitors journal April 2003
Folding flexible co-extruded all-polymer multilayer distributed feedback films to control lasing journal June 2012

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Related Subjects

36 MATERIALS SCIENCE