"

Cookies ussage consent

Our site saves small pieces of text information (cookies) on your device in order to deliver better content and for statistical purposes. You can disable the usage of cookies by changing the settings of your browser. By browsing our site without changing the browser settings you grant us permission to store that information on your device.

I agree, do not show this message again.

Corona-charged polypropylene films investigated by a laser refractometer

T. YOVCHEVA1,* , S. SAINOV2, G. MEKISHEV1

Affiliation

  1. Department of Experimental Physics, University of Plovdiv “Paissi Hilendarski”, 24 Tzar Assen Str., 4000 Plovdiv, Bulgaria
  2. Central Laboratory of Optical Storage and Processing of Information, Bulgarian Academy of Sciences, Bl. 101 Acad. G. Bonchev Str., 1113 Sofia, Bulgaria

Abstract

Optical and electret characteristics of thin 20 μm polypropylene (PP) corona electrets have been studied in the present work. Refractive index (RI) in a surface layer with submicrometer thickness was determined by the method of the disappearing diffraction pattern. Electret surface potential was measured by the method of the vibrating electrode with compensation. The analysis showed that electret charge was mainly deposited onto the charged surfaces. The measured RI values for the electret samples were higher than those for the uncharged samples. We assumed it was due to surface structural changes in the PP films that occurred during corona charging..

Keywords

Polypropylene thin films, Electrets, Laser refractometer.

Submitted at: Feb. 28, 2007
Accepted at: July 15, 2007

Citation

T. YOVCHEVA, S. SAINOV, G. MEKISHEV, Corona-charged polypropylene films investigated by a laser refractometer, Journal of Optoelectronics and Advanced Materials Vol. 9, Iss. 7, pp. 2087-2090 (2007)