Sökning: "EPDM"

Visar resultat 1 - 5 av 11 avhandlingar innehållade ordet EPDM.

  1. 1. Long-term performance of polymeric materials in nuclear power plants

    Författare :Payam Pourmand; Ulf W. Gedde; Sue Burnay; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; EPDM; thermal ageing; radiation ageing; portable NMR spectroscopy; modulus profiling; condition monitoring; plasticizer migration; Kemi; Chemistry;

    Sammanfattning : Access to energy is crucial for modern societies to function sustainably. In addition, nuclear power has for a long time been considered a reliable source of energy. However, the majority of nuclear power plants are reaching the end of their service lifetimes, and it is crucial to verify that every component can withstand the added service time. LÄS MER

  3. 2. Electric Charges on Insulator Surfaces and their Influence on Insulator Performance

    Författare :Hans Sjöstedt; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; EPDM; silicone rubber; material properties; surface potential measurements; outdoor insulation materials;

    Sammanfattning : AbstractPolymeric materials used in high voltage insulation systems are subjected to electric fields which can be strong enough to initiate electrical discharges in the surrounding gas environment. Generated electrical charges may be deposited on polymer surfaces and alter electric field distributions, thus affecting insulation performance and their corresponding breakdown characteristics. LÄS MER

  4. 3. Long-term exposure of polymeric insulators to coastal contamination at Anneberg test station

    Författare :Torbjörn Sörqvist; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; SIR insulators; polymeric insulators; EPDM rubber insulators; leakage currents; dry-bands; hydrophobicity; flashovers;

    Sammanfattning : .... LÄS MER

  5. 4. Polymeric Outdoor Insulators - A Long-term Study

    Författare :Torbjörn Sörqvist; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

    Sammanfattning : The long-term performance and the material state of polymeric insulators were examined from December 1987 to February 1997. To a large extent the study was conducted at Anneberg field station, on the west coast of Sweden. The project comprised a great number of commercially available polymeric insulators from several prominent manufacturers. LÄS MER

  7. 5. Imaging chemiluminescence applied to oxidation of rubber materials and polyamide

    Författare :Gustav Ahlblad; KTH; []
    Nyckelord :;

    Sammanfattning : In this thesis the heterogeneous nature of thermal oxidationof polymer materials have been investigated by imagingchemiluminescence (KL). The issues of oxidation depth profilesand physical spreading of oxidation in rubbers materials andpolyamide have been addressed. LÄS MER