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Dielectric Analysis Of Semi-Crystalline Poly(Ethylene Terephthalate)

Published online by Cambridge University Press:  15 February 2011

Jianghua Wei
Affiliation:
Department of Chemical Engineering, Michigan State University, E. Lansing, MI 48824
Richard Delgado
Affiliation:
Department of Chemical Engineering, Michigan State University, E. Lansing, MI 48824
Martin C. Hawley
Affiliation:
Department of Chemical Engineering, Michigan State University, E. Lansing, MI 48824
Mark T.Demeuse
Affiliation:
EniChem America Inc., Monmouth Junction, NJ 08852.
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Abstract

Dielectric properties of poly(ethylene terephthalate) (PET) were measured over a frequency range of 10 KHz to 2.45 GHz and a temperature range of 20 to 110°C. Relaxation peaks were identified at 1) fixed frequency with variable temperatures, and 2) fixed temperature with variable frequencies. The crystallinity of poly (ethylene terephthalate) was measured using differential scanning calorimetry (DSC). Relationships between crystallinity, dielectric properties, and location of the dielectric relaxation peak on the frequency and temperature scales were studied for poly(ethylene terephthalate). Also, the dielectric loss factor decreases with increased crystallinity at 2.45 GHz and 4 GHz within the temperature range studied.

Type
Research Article
Copyright
Copyright © Materials Research Society 1994

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References

REFERENCES

1. Ku, C.C. and Liepins, R., “Electrical Properties of Polymers: chemical principles”, Macmillan Publishing Company, (1987).Google Scholar
2. Lawton, E.L. and Ringwald, E.L., in Polymer Handbook, edited by Brandrup, J. and Immergut, E.H. (John Wiley & Sons, Inc.), 3rd edition, p. V102 (1989).Google Scholar
3. Osaki, S., Polymer, 35 (1), 47 (1994).Google Scholar
4. Schlosser, E. and Schonhals, A., Colloid and Polymer Science, 267(11), 963 (1989).Google Scholar
5. Reddish, W., Trans. Faraday Soc., 46, 459 (1950).Google Scholar
6. Jow, J., Ph.D. dissertation, Michigan State University, (1988).Google Scholar
7. Delgado, R., Wei, J., DeMeuse, M., and Hawley, M. C., “Identification of Dielectric Relaxation Mechanism of a Thermosetting Polycarbonate”, AIChE 1993 Summer National Meeting, Seattle, Washington, (1993).Google Scholar
8. Osaki, S., J. Appl. Phys., 64.(8), 4181 (1988).Google Scholar