Search for dissertations about: "siloxanes"

Found 3 swedish dissertations containing the word siloxanes.

  1. 1. Partitioning and persistence of volatile methylsiloxanes in aquatic environments

    University dissertation from Stockholm : Department of Environmental Science and Analytical Chemistry, Stockholm University

    Author : Dimitrios Panagopoulos; Stockholms universitet.; [2016]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; siloxanes; organic carbon; sediment; partitioning; persistence; Applied Environmental Science; tillämpad miljövetenskap;

    Abstract : The presence of volatile methylsiloxanes (VMS) in the environment has raised concerns among environmental chemists and regulators about their persistence and the risks they may pose to the environment. This thesis explores the partitioning and persistence of VMS in aquatic environments. READ MORE

  2. 2. Loss and recovery of hydrophobicity of polydimethylsiloxane after exposure to electrical discharges

    University dissertation from Institutionen för polymerteknologi

    Author : Henrik Hillborg; KTH.; [2001]
    Keywords : silicone rubber; polydimethysiloxane; dydrophobicity; corona; air-plasma; oxygen-plasma; surface characterisation;

    Abstract : Silicone rubber based on polydimethylsiloxane is used ashigh voltage outdoor insulation, due to its ability to preservethe hydrophobic surface properties during service and evenregain hydrophobicity after exposure to electrical discharges.The underlying processes for the hydrophobic recovery arediffusion of low molar mass siloxanes from the bulk to thesurface and reorientation by conformational changes ofmolecules in the surface region. READ MORE

  3. 3. Crosslinking of Polymers. Molecular Structure and Properties of Sol and Network

    University dissertation from Chalmers University of Technology

    Author : Helena Andersson; Chalmers tekniska högskola.; Chalmers University of Technology.; [2004]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Teknisk materialvetenskap; Materials science; Silicone; PDMS; contamination; network; polyethylene; crosslinking; bimodal; long chain branchin; entanglement;

    Abstract : Crosslinking is a well-known procedure for improving a variety of features of polymers, particularly the dimension stability at elevated temperatures. Crosslinking implies the formation of a network, the gel, but there is always a certain portion of the material, the sol, that remains non-crosslinked within the network. READ MORE