Sökning: "crystalline ordering"

Visar resultat 1 - 5 av 14 avhandlingar innehållade orden crystalline ordering.

  1. 1. Ordering in Crystalline Short-Chain Polymer Electrolytes

    Detta är en avhandling från Uppsala : Acta Universitatis Upsaliensis

    Författare :Anti Liivat; Uppsala universitet.; [2007]
    Nyckelord :Atomic and molecular physics; polymer electrolytes; molecular dynamics; ionic conductivity; crystalline ordering; polymer chain length; smectic; nematic; Atom- och molekylfysik;

    Sammanfattning : Polymer electrolytes are the most obvious candidates for safe "all-solid" Li-ion batteries and other electrochemical devices. However, they still have relatively poor ionic conductivities, which limits their wider adoption in commercial applications. LÄS MER

  2. 2. Modulating the anion ordering in apatites

    Detta är en avhandling från Stockholm : Stockholm University

    Författare :Peter Alberius-Henning; Juan Manuel Pérez-Mato; [1999]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; oorganisk kemi; Inorganic Chemistry;

    Sammanfattning : Hydroxyapatite constitutes the main inorganic part of the skeleton, and since the beginning of the seventies, synthetic apatite has been used in implants. The physical properties of this crystalline material are directly dependent on its atomic arrangement. If a better understanding of apatite chemistry is sought, important for e.g. LÄS MER

  3. 3. Ternary Block Copolymer Systems - Phase Behaviour and Phase Structure

    Detta är en avhandling från Birgitta Svensson, Physical Chemistry 1, Lund University

    Författare :Birgitta Svensson; [1999]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Theoretical chemistry; lyotropic; thermotropic; SANS; SAXS; scattering; semicrystalline; reverse micelle; micellar solution; liquid crystalline; phase diagram; phase behaviour; block copolymer; pluronic; poly ethylene oxide ; poly propylene oxide ; quantum chemistry; Teoretisk kemi; kvantkemi;

    Sammanfattning : Ternary isothermal (25°C) polyoxyalkylene triblock block copolymer ((EO)x(PO)y(EO)x where x is the number of ethylene oxide, EO, segments and y is the number of propylene oxide, PO, segments) systems with water and p-xylene as selective solvents for the PEO and PPO blocks, respectively, were chosen as study systems in this thesis as these ternary systems are good model systems for the self-assembly of block copolymers. The phase behaviour has been studied at varied block copolymer molecular weight and relative PEO/PPO block ratio. LÄS MER

  4. 4. Chiral Liquid Crystalline Side-Chain Polymers. Design, Synthesis and Properties

    Detta är en avhandling från Birgitta Svensson, Physical Chemistry 1, Lund University

    Författare :Magnus Svensson; [1997]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; lateral substituent; electro-optic; ferroelectric; molar mass; polymer; side-group; thin film; polysiloxane;

    Sammanfattning : The potential use of chiral liquid crystalline materials, low molar mass as well as polymers, in technical applications has been recognized for some decades now. A number of interesting phenomena based on the spontaneous ordering of the liquid crystal forming molecules are strong reasons for the research effort in this area. LÄS MER

  5. 5. Computer Simulations of Simple Liquids with Tetrahedral Local Order the Supercooled Liquid, Solids and Phase Transitions

    Detta är en avhandling från Stockholm : Numerical Analysis and Computer Science (NADA) (together with KTH), Stockholm University

    Författare :Måns Elenius; Mikhail Dzugutov; Jonathan Doye; [2009]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Simple liquids; glasses; liquid-glass transition; supercooled liquids; tetrahedral liquids; phase transitions; quasicrystals; molecular dynamics; NATURAL SCIENCES Physics Condensed matter physics; NATURVETENSKAP Fysik Kondenserade materiens fysik; NATURAL SCIENCES Physics Condensed matter physics Liquid physics; NATURVETENSKAP Fysik Kondenserade materiens fysik Vätskefysik; Numerical Analysis; numerisk analys;

    Sammanfattning : The understanding of complex condensed matter systems is an area of intense study. In this thesis, some properties of simple liquids with strong preference for tetrahedral local ordering are explored. These liquids are amenable to supercooling, and give complex crystalline structures on eventual crystallisation. LÄS MER