UTILIZATION OF POLYETHYLENE TEREPHTHALATE IN ORDER TO OBTAIN POLYMERIC CORONA ELECTRETS
Ключевые слова:polymer corona electrets, polyethylene terephthalate, electret potential difference, technical gossypol, sevilen, wollastonite, crystallinity, melting point
The possibility of recycling recycled polyethylene terephthalate (plastic) in order to obtain polymer corona electrets and compositions, sealing materials, compositions for corrosion protection was explored in this article.
Work objective is to study the effect of a dispersed filler - wollastonite and a stabilizing additive - technical gossypol, as well as savilen on the electret properties of a composite based on waste plastic materials - polyethylene terephthalate (PET). Technical gossypol, wollastonite of the Verkhnebadam deposit (Kazakhstan, Turkestan region), savilene - a copolymer of ethylene with vinyl acetate and a finished composite: mineral filler - wollastonite; sevilen; technical gossypol; PET - the rest were the objects of study. It has been established that the introduction of fillers into the composition of a PET-based composite leads to an increase in its density and degree of crystallinity in the composition of the composite and, as a result, to a decrease in its moisture permeability, which leads to a decrease in conductivity, and hence, an increase in the stability of the electret state of composite films. Changes in the surface structure of polyethylene terephthalate and its compositions with the above components during electretization were established using microscopy and infrared spectroscopy.
Additives of the above components to the composition of a composite based on recycled polyethylene terephthalate affect the electretization process, the effect of the interaction of various fillers can significantly change the stability of composite electrets, which seems promising for using the results obtained in the chemical and petrochemical industries.