An investigation of the assembly conditions of dielectric particles in uncured thermoset polymers

C. P. Bowen, A. S. Bhalla, R. E. Newnham, Clive A. Randall

Research output: Contribution to journalArticle

20 Citations (Scopus)

Abstract

It has been found that electric field induced fibrolysis of suspended dielectric powder in a variety of uncured thermoset polymeric materials is a potential fabrication means to assemble ceramic-polymer composites. The resulting composite material consists of a quasi 1–3 connectivity pattern due to the formation of fibrils by the ceramic powder. For a given thermoset polymer, the degree to which these fibrils form is strongly dependent on both the magnitude and frequency of the applied field. Fibril formation is maximized at certain ac frequencies independent of the volume fraction of filler utilized. Outside these frequency ranges, electroviscous behavior and the associated fibrolysis are drastically diminished or even nonexistent. The critical frequency values and their relation to the ideal assembly conditions for this class of composite materials are the focus of this paper.

Original languageEnglish (US)
Pages (from-to)781-788
Number of pages8
JournalJournal of Materials Research
Volume9
Issue number3
DOIs
StatePublished - Jan 1 1994

Fingerprint

Thermosets
Polymers
assembly
Powders
composite materials
Composite materials
polymers
ceramics
critical frequencies
fillers
Fillers
Volume fraction
frequency ranges
Electric fields
Fabrication
fabrication
electric fields

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

Cite this

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abstract = "It has been found that electric field induced fibrolysis of suspended dielectric powder in a variety of uncured thermoset polymeric materials is a potential fabrication means to assemble ceramic-polymer composites. The resulting composite material consists of a quasi 1–3 connectivity pattern due to the formation of fibrils by the ceramic powder. For a given thermoset polymer, the degree to which these fibrils form is strongly dependent on both the magnitude and frequency of the applied field. Fibril formation is maximized at certain ac frequencies independent of the volume fraction of filler utilized. Outside these frequency ranges, electroviscous behavior and the associated fibrolysis are drastically diminished or even nonexistent. The critical frequency values and their relation to the ideal assembly conditions for this class of composite materials are the focus of this paper.",
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An investigation of the assembly conditions of dielectric particles in uncured thermoset polymers. / Bowen, C. P.; Bhalla, A. S.; Newnham, R. E.; Randall, Clive A.

In: Journal of Materials Research, Vol. 9, No. 3, 01.01.1994, p. 781-788.

Research output: Contribution to journalArticle

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