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Wyroby z tworzyw sztucznych produkowane są na skalę przemysłową już od ponad 100 lat. Ze względu na dużą różnorodność polimerów i ich właściwości wyroby z tworzyw sztucznych można spotkać w każdej dziedzinie życia. Stosunkowo niewielka gęstość większości tworzyw sztucznych sprawia, że wyroby z nich wykonane są bardzo lekkie. Polimery są odporne na działanie różnych czynników powodujących degradację...
Large number of studies describes phenomena associated with space charge build-up in polymeric materials and the incited consequences when high voltage direct current is imposed. Currently, the studies are oriented towards possibilities to minimize this drawback by addition of nanometric size inclusions into the bulk of the polymer material. One alternative approach is to tailor the interface of the...
Trap depth in polyethylene was numerically estimated using calculation of molecular orbital method. In polymeric material, electric conduction seems to be strongly affected by the existence of carrier traps. Therefore the estimation of trap depth is one of important factors for electrical characterization of polymeric materials. However, there are not so many examples to estimate the trap depth. Therefore,...
It may be possible to replace SF6 gas in power switchgear by exploiting the arc quenching properties of common polymeric materials. In this research, the complex interactions between polymers and arc plasma have been investigated in a realistic environment using a model circuit breaker. The polymers studied were polyethylene and polymethylmethacrylate, which exhibit different processes to quench the...
Whenever a polymeric material is subjected to an electrical stress, imperfections such as protrusions, contaminants and microvoids, will all act as points where the field is enhanced, causing the degradation processes to be initiated. However, as manufacturing technology improves, insulation systems are of higher quality and their interfaces smoother. The reduction in concentration and size of impurities...
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