The electret effect in polypropylene fibers treated in a corona discharge

A. Kravtsov, H. Br�nig, S. Zhandarov, R. Beyreuther
2000 Advances in Polymer Technology  
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.
more » ... e 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.
doi:10.1002/1098-2329(200024)19:4<312::aid-adv7>3.0.co;2-x fatcat:gztnekycu5aj3l3h6zf5igqel4