Sökning: "Thomas Hjertberg"

Hittade 2 avhandlingar innehållade orden Thomas Hjertberg.

  1. 1. Long-term Performance of PVC and CSPE Cables used in Nuclear Power Plants : the Effect of Degradation and Plasticizer migration

    Författare :Maria Ekelund; Ulf Gedde; Thomas Hjertberg; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; PCV; CSPE; cables; ageing; mechanical properties; plasticizer migratio; LIRA; life time prediction; Chemistry; Kemi;

    Sammanfattning : Enormous amounts of low voltage cables installed in a Swedish nuclear power plant are reaching their expected lifetimes. Since the cables are crucial to operational safety, it is of great importance that the actual condition of the installed cables is determined. LÄS MER

  3. 2. Longterm performance of polyolefins in different environments including chlorinated water: antioxidant consumption and migration and polymer degradation

    Författare :Marie Lundbäck; Ulf Gedde; Thomas Hjertberg; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Chemical engineering; polyethylene; polybutylene; HDPE; LLDPE; phenolic antioxidants; oxidation induction time OIT ; migration; chlorinated water; pressure testing; lifetime; chemical consumption.; Kemiteknik; Chemical engineering; Kemiteknik;

    Sammanfattning : The long-term performance of stabilized polyolefins in different environments was studied with focus on antioxidant consumption and migration. Plaques of linear polyethylene (LPE) and branched polyethylene (BPE) were stabilized with Santonox® R (4,4'-Thiobis(6-tert-butyl-3-methylphenol)), Irganox® 1081 (2,2’-Thiobis(4-methyl-6-tertbutylphenol)), or Lowinox® 22M46 (2,2’-Methylenebis(6-tert-butyl-4-methylphenol)). LÄS MER