Sökning: "Silanes"

Visar resultat 1 - 5 av 22 avhandlingar innehållade ordet Silanes.

  1. 1. Surface Characterisation Using ToF-SIMS, AES and XPS of Silane Films and Organic Coatings Deposited on Metal Substrates

    Detta är en avhandling från Uppsala : Acta Universitatis Upsaliensis

    Författare :Ulf Bexell; Uppsala universitet.; Högskolan Dalarna.; [2003]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TECHNOLOGY Materials science; TEKNIKVETENSKAP Teknisk materialvetenskap; materialvetenskap; Materials Science; Materials science; Silanes; Organic films; ToF-SIMS; AES; XPS; Materialvetenskap;

    Sammanfattning : This work focuses on the surface and interfacial characterisation of silane films of a non-organofunctional silane, 1,2-bis(triethoxysilyl)ethane (BTSE), and an organofunctional silane, γ-mercaptopropyltrimethoxysilane (γ-MPS), deposited on Al, Zn and Al-43.4Zn-1.6Si (AlZn) alloy coated steel. LÄS MER

  2. 2. SmCo for polymer bonded magnets : Corrosion, silanization, rheological, mechanical and magnetic properties

    Detta är en avhandling från Stockholm : KTH Royal Institute of Technology

    Författare :Muhammad Irfan Qadeer; KTH.; [2012]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Organofunctional alkoxysilanes; High temperature oxidation; Rare-earth magnetic alloys; SmCo; Isothermal; Non-isothermal; Microstructure; Magnetic properties;

    Sammanfattning : This thesis presents the study of organofunctional alkoxysilane coatings to prevent high temperature oxidation of Sm-Co powders. Sm-Co are important permanent magnetic alloys, owing to their high Curie temperature and large values of magnetocrystalline anisotropy. LÄS MER

  3. 3. Development of Asymmetric Iridium Catalysed Hydrogenation Reactions

    Detta är en avhandling från Stockholm : Department of Organic Chemistry, Stockholm University

    Författare :Suppachai Krajangsri; Stockholms universitet.; [2018]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Asymmetric hydrogenation; Iridium catalyst; Peterson olefination; Dynamic Kinetic Resolution; Organic Chemistry; organisk kemi;

    Sammanfattning : The focus of the work presented in this thesis is the development of iridium-catalysed asymmetric hydrogenation reactions.The first part of this thesis covers the development of dynamic kinetic resolution in asymmetric hydrogenation of chiral, racemic secondary allylic alcohols, which are converted to chiral saturated alcohols with high dr and ee. LÄS MER

  4. 4. Ruthenium-catalyzed C-H Functionalization of (Hetero)arenes

    Detta är en avhandling från Uppsala : Acta Universitatis Upsaliensis

    Författare :Karthik Devaraj; Uppsala universitet.; [2017]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; catalysis; C-H activation; heterocycles; ruthenium; aryne precursor; silylation; gramine;

    Sammanfattning : This thesis concerned about the Ru-catalyzed C-H functionalizations on the synthesis of 2-arylindole unit, silylation of heteroarenes and preparation of aryne precursor.In the first project, we developed the Ru-catalyzed C2-H arylation of N-(2-pyrimidyl) indoles and pyrroles with nucleophilic arylboronic acids under oxidative conditions. LÄS MER

  5. 5. Synthesis and characterisation of thermoset-clay nanocomposites

    Detta är en avhandling från Luleå : Luleå tekniska universitet

    Författare :Xavier Kornmann; [1999]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Polymeric Composite Materials; Polymera konstruktionsmaterial;

    Sammanfattning : Polymer-clay nanocomposites are materials reinforced on a molecular scale by 1 nm-thick clay layers dispersed in a polymer matrix. Thermoset-clay nanocomposites were synthesised from unsaturated polyester and epoxy resins with two different approaches. LÄS MER