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dc.contributor.advisorNikolić, Ljubiša
dc.contributor.otherCakić, Suzana
dc.contributor.otherNikolić, Goran S.
dc.contributor.otherNIkolić, Marija
dc.contributor.otherIlić-Stojanović, Snežana
dc.creatorRadosavljević, Jelena N.
dc.date.accessioned2020-02-24T11:51:38Z
dc.date.available2020-02-24T11:51:38Z
dc.date.available2020-07-03T16:14:17Z
dc.date.issued2019-09-21
dc.identifier.urihttp://eteze.ni.ac.rs/application/showtheses?thesesId=7170
dc.identifier.urihttp://nardus.mpn.gov.rs/handle/123456789/11980
dc.identifier.urihttps://fedorani.ni.ac.rs/fedora/get/o:1607/bdef:Content/download
dc.identifier.urihttp://vbs.rs/scripts/cobiss?command=DISPLAY&base=70052&RID=534136982
dc.description.abstractThanks to its excellent properties, such as electrical resistivity, flexibility and resistance, ethylene-propylene-diene (EPDM) is widely used as an insulating material for electrical cables. Insulation layers of power cables, which make up 95% of electrical cables at nuclear power plants, are made of elastomers. Therefore, normal work can be seriously compromised if insulation of some cables is easily damaged or degraded. The performance of electrical cables depends on the physical integrity of the key components in the insulation layers, because micro-cracks can lead to loss of insulation characteristics. The use of polymeric materials for the production of electrical insulation is based on their favorable properties, which are related to their high stability. Oxidation as a major degradation process changes the functional characteristics of electrical insulations. The obtaining of insulating layers of current cables with satisfactory properties in an electric field were achieved by a well-chosen formulation consisting of high performance materials. In this dissertation, a research was carried out regarding the choice of polymer formulations with EPDM, testing the crosslinking of the appropriate EPDM formulation using peroxide compounds in order to slow down the degradation of insulation polymer layers of medium voltage cables. The proposed EPDM formulations were examined in terms of degradation, improvement of rheological, mechanical and electrical performances, and thermal stability. The possibility of reducing the concentration of zinc oxide in the formulation with simultaneous improved thermal and electrical stability due to the adverse impact of zinc oxide on the environment as well as the costeffectiveness of the insulation process on the cables were investigated. A new HPLC method that were developed could be used in the cable industry for routine measurements of percentage peroxide utilization in the process of making insulating polymer layers of EPDM. The results obtained showed that the appropriate types and concentrations of peroxides, as well as the amounts of ethylene in EPDM, can result in the development of stable insulation of medium voltage cables with excellent electromechanical efficiency.en
dc.formatapplication/pdf
dc.languagesr
dc.publisherУниверзитет у Нишу, Технолошки факултет, Лесковацsr
dc.rightsopenAccessen
dc.sourceУниверзитет у Нишуsr
dc.subjectOptimizacijasr
dc.subjectOptimizationen
dc.subjectPeroksidno umrežavanjesr
dc.subjectEPDMsr
dc.subjectReološke karakteristikesr
dc.subjectMehaničke karakteristikesr
dc.subjectElektrične karakteristikesr
dc.subjectTermička stabilnostsr
dc.subjectCink-oksidsr
dc.subjectHPLCsr
dc.subjectPeroxide crosslinkingen
dc.subjectEPDMen
dc.subjectRheology characteristicsen
dc.subjectMechanical propertiesen
dc.subjectElectrical propertiesen
dc.subjectThermal stabilityen
dc.subjectZnOen
dc.subjectHPLCen
dc.titleOptimizacija umrežavanja izolacionog sloja srednje naponskih kablova na bazi etilen-propilen-dien polimerasr
dc.typedoctoralThesis
dc.rights.licenseBY-NC-ND
dc.identifier.fulltexthttp://nardus.mpn.gov.rs/bitstream/id/54768/Disertacija.pdf
dc.identifier.fulltexthttp://nardus.mpn.gov.rs/bitstream/id/54769/Radosavljevic_Jelena_N.pdf


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