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The mechanism of electric discharge effect on the modification process of linear low-density polyethylene

Ahmadov Elbrus Nasi, Rzayeva Sona, Mammadov Nijat

Przegląd Elektrotechniczny

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2023

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R. 99, nr 6

208--211

EN

The article analyses the mechanism of the electric discharge effect on the process of copolymerization of linear low density polyethylene. Under the influence of electric discharges, a change in the electrophysical property occurs, which makes it possible to change the properties of materials in a predetermined direction. The resulting material, due to the absence of a homopolymer of the grafted monomer, has improved mechanical characteristics, increased resistance to aggressive environments, and the traditional initiator is not used in its synthesis. It can be argued that the development of a method for the electrical discharge synthesis of a copolymer seems to be an important step in solving the problem of achieving the efficiency, economy, and ecological purity of technological processes.

PL

W artykule przeanalizowano mechanizm wpływu wyładowania elektrycznego na proces kopolimeryzacji liniowego polietylenu małej gęstości. Pod wpływem wyładowań elektrycznych następuje zmiana właściwości elektrofizycznych, co umożliwia zmianę właściwości materiałów w zadanym kierunku. Otrzymany materiał, ze względu na brak homopolimeru szczepionego monomeru, posiada ulepszone właściwości mechaniczne, podwyższoną odporność na agresywne środowiska, a do jego syntezy nie stosuje się tradycyjnego inicjatora. Można stwierdzić, że opracowanie metody elektroerozyjnej syntezy kopolimeru wydaje się być ważnym krokiem w rozwiązaniu problemu osiągnięcia wydajności, ekonomiczności i przyjazności dla środowiska procesów technologicznych.

2

Effect of electrode material on electric strength of compressed air in uniform electric field

Zakrzewski S., Opydo W.

Poznan University of Technology Academic Journals. Electrical Engineering

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2010

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No. 64

71--77

EN

The paper presents the result of the tests of the effects of electrode material, occurrence of dielectric coatings on the electrodes, and the pressure on the air breakdown voltage under alternative frequency of 50 Hz. Electrodes of the considered insulation systems were of plane design and made of aluminum, stainless steel, cooper or bronze. The tests have been carried out under the air pressure of 105 to 8•105 Pa. In order to determine the parameters of the experimental equation describing mathematical relationships of electric strength of the considered systems on the pressure the STATISTICA software has been used.

3

The planar crack problem for a dielectric medium in a uniform electric field

Shindo Y., Narita F.

Archives of Mechanics

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2004

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Vol. 56, nr 6

447-463

EN

The theory for dielectric materials is applied to solve the planar problem of a Griffith crack in an infinite isotropic dielectric body subjected to a far-field tension and a uniform electric field. Fourier transforms are used to reduce the mixed boundary value problem to two simultaneous dual integral equations. The integral equations are then solved exactly, and the stress intensity factor and energy release rate under Mode I and Mode II loadings are expressed in closed form.