Open AccessThe electret effect in polypropylene fibers treated in a corona discharge
Author(s) -
Kravtsov A.,
Brünig H.,
Zhandarov S.,
Beyreuther R.
Publication year - 2000
Publication title -
advances in polymer technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.523
H-Index - 44
eISSN - 1098-2329
pISSN - 0730-6679
DOI - 10.1002/1098-2329(200024)19:4<312::aid-adv7>3.0.co;2-x
Subject(s) - electret , materials science , polypropylene , corona discharge , electric field , composite material , trapping , corona (planetary geology) , corona ring , relaxation (psychology) , polarization (electrochemistry) , voltage , electrical engineering , chemistry , physics , astrobiology , venus , engineering , psychology , ecology , social psychology , quantum mechanics , biology
In this work, melt‐spun polypropylene (PP) fibers were treated in an electric field of a corona discharge. The fibers were then characterized using the thermally stimulated current (TSC) spectroscopy. It has been shown that the electret state of corona‐treated PP fibers is a result of the combination of Maxwell–Wagner polarization and charge trapping. Activation energies and relaxation times for these processes have been determined, and characteristics of trapping sites have been calculated. The electret state induced in PP fibers by the corona discharge treatment holds for a long time (several months). Our analysis of the effect of processing temperature and electric field intensity on the characteristics of the electret state in melt‐spun PP fibers allows one to specify optimum technological regimes for industrial production of PP‐based electret filter materials. © 2000 John Wiley & Sons, Inc. Adv Polym Techn 19: 312–316, 2000