In-Line Dielectric Monitoring During Extrusion of Filled Polymers

Published

May 1, 2002

Author(s)

Anthony J. Bur, S C. Roth, M M. McBrearty

Abstract

Dielectric measurements were made on clay filled polyethylene-ethyl vinyl acetate (EVA) copolymer nanocomposites during processing by extrusion. The results show that composites containing chemically treated clays display significant dielectric dispersions. The addition of natural clay to the EVA copolymer increased the dielectric constant or relative permittivity above that of the EVA copolymer but did not increase the conductivity or cause any dispersion. The chemically treated clays, which are known to exfoliate in the composite with EVA copolymer, gave substantially higher relative permitivity and conductivity and distinct variations with frequency consistent with dielectric relaxations at frequencies below 3000Hz. One clay treatment gave a larger dielectric dispersion than the other.

Proceedings Title

Proceedings of the Society of Plastics Engineers Annual Technical Meeting

Volume

73 No. 5

Issue

No. 5

Conference Dates

May 1, 2001

Conference Location

Dallas, TX

Conference Title

Society of Plastics Engineers

Pub Type

Conferences

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Keywords

clay nanocomposite, dielectric constant, dielectric dispersion, polyethylene ethyl vinyl acetate

Citation

Bur, A. , Roth, S. and McBrearty, M. (2002), In-Line Dielectric Monitoring During Extrusion of Filled Polymers, Proceedings of the Society of Plastics Engineers Annual Technical Meeting, Dallas, TX, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=851850 (Accessed October 17, 2025)