Sökning: "ring opening"

Visar resultat 1 - 5 av 109 avhandlingar innehållade orden ring opening.

  1. 1. Controlled Ring-Opening Polymerization : Mechanism and Synthesis of Macromolecular Architectures with Tailored Properties

    Författare :Maria Ryner; KTH; []
    Nyckelord :controlled ring-opening polymerization; poly L-lactide ; poly 1; 5-dioxepan-2one ; stannous octoate; tin alkoxide; DFT methods; mechanism; triblock; multiblock; tailored hydrophilicity; elastomers; resorbable materials;

    Sammanfattning : .... LÄS MER

  3. 2. Controlled ring-opening polymerization : Polymers with designed macromolecular architechture

    Författare :Kajsa Stridsberg; KTH; []
    Nyckelord :;

    Sammanfattning : .... LÄS MER

  4. 3. Development of ring-opening catalysts for diesel quality improvement

    Författare :Ulf Nylén; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; ring opening; naphthenes; cetane number improvement; indan; light cycle oil LCO ; Pt-Ir catalyst; catalyst characterization; aromatic sulphur compounds; GC-SCD; distribution; analysis;

    Sammanfattning : The global oil refining industry with its present shift inproduct distribution towards fuels such as gasoline and dieselwill most likely hold the fort for many years to come. However,times will change and survival will very much depend onprocessing flexibility and being at the frontiers of refiningtechnology, a technology where catalysts play leading roles. LÄS MER

  5. 4. C2- and C3-symmetric ligands via ring-opening of aziridines

    Författare :Fredrik Lake; KTH; []
    Nyckelord :asymmetric catalysis; aziridine; benzaldehyde; diethylzinc; enantionselective; ligand; proazaphosphatrane; ring-opening; sulfonamide; symmetry; titanium; nicronium;

    Sammanfattning : This thesis deals with the design and synthesis of chiralenantiopure nitrogencontaining ligands and the use of theseligands in asymmetric catalysis. A modular synthetic approachto enantiopure nitrogen-containing ligands was developed. Thesynthetic method is based on the ring-opening of activatedchiral aziridines by nitrogen nucleophiles. LÄS MER

  7. 5. Ring-opening polymerization from cellulose for biocomposite applications

    Författare :Hanna Lönnberg; Anders Hult; David Plackett; KTH; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; cellulose; ring-opening polymerization; polycaprolactone; grafting from; Chemistry; Kemi;

    Sammanfattning : There is an emerging interest in the development of sustainable materials with high performance. Cellulose is promising in this regard as it is a renewablere source with high specific properties, which can be utilized as strong reinforcements in novel biocomposites. LÄS MER