Sökning: "copolymers"

Visar resultat 1 - 5 av 112 avhandlingar innehållade ordet copolymers.

  1. 1. Durable Polysulfones with Densely Sulfonated Segments for Highly Proton Conducting Membranes

    Detta är en avhandling från Lund University (Media-Tryck)

    Författare :Shogo Takamuku; Lunds universitet.; Lund University.; [2012]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; polymer electrolytes; sulfonations; polycondensation; polyaromatics; ionomers; sulfonated monomers; block copolymers; segmented copolymers; sequenced copolymers; poly arylene ether sulfone s; lithiations; sulfinations; metalations; phase-separation; highly sulfonations; macromonomers; blocky structures;

    Sammanfattning : Popular Abstract in English Fuel cells have been considered as alternative power source to petroleum oil. Especially, fuel cells have potentials to provide no pollutant emission (e.g., CO2, NOx, SOx) out of the power generation. LÄS MER

  2. 2. Functional Copolymers of Polyvinylpyrrolidone

    Detta är en avhandling från Lund University (Media-Tryck)

    Författare :Jonas Engström; [2006]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; suspension polymerization; functional monomers; 1-vinylpyrrolidin-2-one; copolymerization; swelling; crosslinking; solid-phase synthesis; drug delivery vehicles.; phase-selective solubility; beads; Polyvinylpyrrolidone;

    Sammanfattning : In many ways, polyvinylpyrrolidone (PVP) has a unique combination of chemical and physical properties. Unlike most polymers it is soluble in water as well as a number of organic solvents. PVP also has excellent film forming properties, outstanding chemical stability, complexing ability, low toxicity, and good adherence to many different substrates. LÄS MER

  3. 3. Bioresorbable copolymers with tailored properies : innovative materials för soft tissuel engineering

    Detta är en avhandling från Stockholm : KTH

    Författare :Natalia Andronova; KTH.; [2006]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; poly 1; 5-dioxepan-2-one ; poly ε-caprolactone ; poly L-lactide ; poly trimethylene carbonate ; triblock; network; cyclic tin alkoxide; controlled coordination-insertion ring-opening polymerization; thermoplastic elastomers; NATURAL SCIENCES Chemistry Organic chemistry Polymer chemistry; NATURVETENSKAP Kemi Organisk kemi Polymerkemi;

    Sammanfattning : The emerging need for new synthetic materials for soft tissue engineering applications encourages the search for innovative polymers having interesting properties. Ring-opening polymerization of lactones and lactides initiated by tin alkoxides has received particular attention due to the versatility of the method for building up well-defined biodegradable structures. LÄS MER

  4. 4. Modification of Surface Properties Through Polymer Adsorption. Kinetics, Interaction, Degradation and Stability

    Detta är en avhandling från Institute for Surface Chemistry, P.O. box 5607, SE-114 86 Stockholm, Sweden

    Författare :Dries Muller; Lunds universitet.; Lund University.; [2000]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; TIRF.; protein; poly lactide ; poly ethylene oxide ; gelatin; exchange; enzyme; ellipsometry; desorption; degradation; adsorption; copolymers; Physical chemistry; Fysikalisk kemi;

    Sammanfattning : The interfacial behaviour of polymers in relation to surface modification and polymer degradation was studied. In the first part the interfacial behaviour of amphiphilic poly(ethylene oxide)–poly(D,L-lactide) (EmLn) diblock copolymers at hydrophilic and hydrophobic substrates from aquous solution was studied. LÄS MER

  5. 5. The Interaction between Triblock Copolymers and Surfactants in Dilute Aqueous Solution

    Detta är en avhandling från Physical Chemistry 1, Lund University

    Författare :Jörgen Jansson; Lunds universitet.; Lund University.; [2004]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Polymer technology; biopolymers; Polymerteknik; Physical chemistry; Fysikalisk kemi; Calorimetry; SAXS; DLS; SLS; Light scattering; Structure; Complex; Block copolymer-surfactant interaction; Block copolymer vesicles; Self-assembly; Triblock copolymers; NMR;

    Sammanfattning : Popular Abstract in Swedish I detta arbete har lösningsegenskaperna av treblocksampolymerer samt deras växelverkan med tensider i utspädda vattenlösningar studerats med hjälp av statisk och dynamiskljusspridning i kombination med andra experimentella tekniker så som kalorimetri, lågvinkel röntgenspridning och själv-diffusionskärnspinresonans. Både hur treblocksampolymerer bildar olika typer av aggregerat och hur de påverkas av olika tensider har undersökts. LÄS MER