Polymeric dielectrics are employed extensively in the power transmission industry, thanks to their excellent properties; however, under normal operating conditions these materials tend to degrade and fail. In this study, samples of low-density polyethylene, polypropylene, polymethyl methacrylate, and polytetrafluorethylene were subjected to corona discharges under nitrogen and air atmospheres. The discharges introduced structural modifications over the polymer surface. From a chemical perspective, the alterations are analogous among the non-fluorinated polymers (i.e., polyethylene (PE), polypropylene (PP), and polymethyl methacrylate (PMMA)). A simulation of the corona discharge allowed the identification of highly reactive species in the proximity of the surface. The results are consistent with the degradation of insulating polymers in high-voltage applications due to internal partial discharges that ultimately lead to the breakdown of the material.
Experimental Characterization of Polymer Surfaces Subject to Corona Discharges in Controlled Atmospheres / A.R. Leon-Garzon, G. Dotelli, M. Tommasini, C.L. Bianchi, C. PIROLA, A. Villa, A. Lucotti, B. SACCHI, L. Barbieri. - In: POLYMERS. - ISSN 2073-4360. - 11:10(2019 Oct 01), pp. 1646.1-1646.17.
|Titolo:||Experimental Characterization of Polymer Surfaces Subject to Corona Discharges in Controlled Atmospheres|
SACCHI, BENEDETTA [Formal Analysis]
|Parole Chiave:||partial discharges; low-temperature plasma; polymer surface degradation; chemical characterization; morphological characterization|
|Settore Scientifico Disciplinare:||Settore CHIM/04 - Chimica Industriale|
|Data di pubblicazione:||1-ott-2019|
|Digital Object Identifier (DOI):||http://dx.doi.org/10.3390/polym11101646|
|Appare nelle tipologie:||01 - Articolo su periodico|