Interdisciplinary Approaches to the Evaluation of Insulation Systems and Their Advanced Modifications

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dc.contributor.authorHornak, Jaroslav
dc.date.accessioned2026-04-22T08:52:26Z
dc.date.available2026-04-22T08:52:26Z
dc.date.issued2025
dc.description.abstract-translatedThis habilitation thesis presents a comprehensive set of scientific research results that demonstrate a systematically structured approach to the targeted modification of the dielectric and mechanical properties of polymer insulating materials. The primary motivation for this research is the need to ensure higher reliability and extended service life of insulation in modern electrical engineering applications, especially in systems operating under DC voltage. The presented work proceeds logically from a theoretical foundation to advanced practical applications, with individual research phases building upon and deriving from the results of previous stages. Initial study focuses on the modification of thermosetting resins, specifically epoxies, which are widely utilized in electro-insulating applications for various purposes. Based on the first results obtained from rigid epoxy systems, the research was expanded into the area of more flexible polymers, starting with polyurethanes. This phase concentrated on materials relevant for industrial applications. It was demonstrated that the incorporation of simple metal oxides at appropriate concentrations leads to a mechanical restriction of polymer chain mobility. This leads to the modification of parameters such as relative permittivity, dielectric losses, and glass transition temperature, which are essential for maintaining stable dielectric properties under higher thermal loads. These findings contributed to a deeper understanding of the interactions between nanoparticles and the soft/hard segments of the polymers. A subsequent part of the thesis focuses on linear low-density polyethylene, which represents a potential alternative for cable insulation. By identifying the optimal concentration of modifying additives, it was possible to minimize negative phenomena, such as those occurring during polarity reversal. The entire body of work is concluded by a detailed study on the long-term thermal aging of polyester insulators, which established a correlational relationship between chemical-structural degradation and the subsequent deterioration of dielectric and mechanical parameters.en
dc.format153 s.cs
dc.identifier.urihttp://hdl.handle.net/11025/67764
dc.language.isoenen
dc.publisherZápadočeská univerzita v Plznics
dc.rights.accessopenAccessen
dc.subjectdielectric
dc.subjectinsulation
dc.subjectnanostructures
dc.subjectpolymer
dc.subjectrelaxation
dc.subjectsynthesis
dc.subject.translateddielektrikumcs
dc.subject.translatedizolacecs
dc.subject.translatednanostrukturycs
dc.subject.translatedpolymercs
dc.subject.translatedrelaxacecs
dc.subject.translatedsyntézacs
dc.titleInterdisciplinary Approaches to the Evaluation of Insulation Systems and Their Advanced Modificationsen
dc.typehabilitační prácecs
dc.typehabilitation thesisen
local.files.count1*
local.files.size44933604*
local.has.filesyes*

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