Melting and crystallisation of a liquid crystalline copolyester and a homopolymer studied by dielectric spectroscopy and DC-measurements

Author

Willems, C. ; van Turnhout, J.

Author_Institution

Dept. of Polymer Technol., Delft Univ. of Technol., Netherlands

fYear

1994

fDate

23-26 Oct 1994

Firstpage

737

Lastpage

742

Abstract

The relation between the degree of crystallinity and the dielectric properties of semicrystalline polymers has been discussed in many publications. The subject of this paper is the change in dielectrical properties during crystallisation and melting, including a comparison between the ohmic AC-conductivity calculated from the dielectric data and the directly measured DC-conductivity. The phenomena occurring in polyethylene terephthalate (PET), a semicrystalline homopolyester, are compared with those of a liquid crystalline copolyester

Keywords

polymers; DC-conductivity; PET; crystallinity; crystallisation; dielectric spectroscopy; liquid crystalline copolyester; melting; ohmic AC-conductivity; polyethylene terephthalate; semicrystalline homopolymer; Crystallization; Dielectric constant; Dielectric loss measurement; Dielectric losses; Dielectric measurements; Frequency; Liquid crystal polymers; Polarization; Positron emission tomography; Temperature;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrical Insulation and Dielectric Phenomena, 1994., IEEE 1994 Annual Report., Conference on

Conference_Location

Arlington, TX

Print_ISBN

0-7803-1950-8

Type

conf

DOI

10.1109/CEIDP.1994.592057

Filename

592057