Interpretation of charge storage in drawn polypropylene and glass fibre reinforced composite from TSDC and mechanical data

Author

Goel, Malti

Author_Institution

Dept. of Sci. & Technol., Technol. Bhavan, New Delhi, India

fYear

1999

fDate

1999

Firstpage

537

Lastpage

540

Abstract

Short Fibre Reinforced Polypropylene (FRP) electrets exhibit much higher Thermally Stimulated Depolarization Current (TSDC) as compared to isotropic polypropylene. Uniaxial stretched polypropylene (SPP) on the other hand, shows lower polarization in comparison to the isotropic sheet and a shift towards higher temperatures in two TSDC peaks observed between 60 and 150°C. This is despite the observation that stretched polypropylene reinforces the structure and improves the toughness and strength in the direction of stretching. The low TSDC in SPP is attributed to reduced segmental mobility. This interpretation is analyzed further and it is suggested that further work on measurement of charge distribution profiles is essential in SPP and FRP to understand the polarization mechanism and take up development of devices such as electret filters

Keywords

dielectric losses; dielectric polarisation; elastic moduli; electrets; glass fibre reinforced plastics; molecular orientation; polymer films; tensile strength; thermally stimulated currents; 60 to 150 C; charge distribution profiles; charge storage; dielectric loss; drawn polypropylene; electret filters; electrets; glass fiber reinforced composite; mechanical loss; molecular alignment; polarization mechanism; reduced segmental mobility; short fibre reinforced polypropylene; storage extension moduli; tensile strength; tensile testing; thermally stimulated depolarization current; uniaxial stretched polypropylene; Current measurement; Dielectric loss measurement; Dielectric losses; Dielectric measurements; Electrets; Fiber reinforced plastics; Glass; Optical fiber polarization; Optical fiber testing; Temperature;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrets, 1999. ISE 10. Proceedings. 10th International Symposium on

Conference_Location

Athens

Print_ISBN

0-7803-5025-1

Type

conf

DOI

10.1109/ISE.1999.832103

Filename

832103