Sökning: "Polyurethanes"

Visar resultat 1 - 5 av 6 avhandlingar innehållade ordet Polyurethanes.

  1. 1. Hydrophilic gels based on polyurethane urea

    Författare :Ingrid Gustafson; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Polyurethanes; pendant double bonds; polymer gels;

    Sammanfattning : .... LÄS MER

  3. 2. Towards sugar- and lignin-based polyesters and polyurethanes with enhanced properties

    Författare :Niklas Warlin; Centrum för analys och syntes; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Polyesters; Polyurethane; Bio-based Materials; HMF; Recycling; Vanillin;

    Sammanfattning : The enormous production and consumption of fossil-based plastics has caused severe environmental challenges such as pollution of the ocean, increased CO2-emissions, and various health problems. Many ofthese concerns are intimately connected to the use of fossil fuels in the production of polymers. LÄS MER

  4. 3. Amphiphilic Polymers as Additives in Biomedical Polyurethanes. Surface Properties and Morphology

    Författare :Maria Kober; Centrum för analys och syntes; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; polymer micelles; phase separation; migration; poly ethylene oxide ; surface enrichment; morphology; polyurethane; additives; Surface modification; amphiphilic polymers; polymer blends; Polymer technology; biopolymers; Polymerteknik;

    Sammanfattning : The aim of this work was to achieve surface modification of two biomedical polyurethanes and one poly(urethane urea) through the addition of small amounts of amphiphilic copolymers in solution. The matrix polymers used were the poly(ether urethane)s Pellethane 2363-80AE (P80) and 2363-75D (P75) and a poly(ether urethane urea) similar to Biomer (PUUR). LÄS MER

  5. 4. Lipase-Mediated Syntheses of Trimethylolpropane-Based Biolubricant and Cyclic Carbonate

    Författare :Amin Bornadel; Bioteknik; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

    Sammanfattning : Abstract Biocatalysis is considered as benign and efficient alternative to chemical catalysis for organic syntheses. Lipases are the most versatile biological catalysts implemented so far with great potential for production of different chemicals and materials in non-conventional reaction media. LÄS MER

  7. 5. Colour-changing textile coatings containing multi-layered mica pigments : an experimental study

    Författare :Veronica Malm; Högskolan i Borås; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Mulit-layered mica pigment; effect pigments; angle-dependent color-changes; textile coatings; surface structure; rheology modifiers; coating parameters; Textile Technology; Textiles and Fashion General ; Textil och mode generell ;

    Sammanfattning : This study investigates the possibility of producing angle-dependent colour-changing textiles with thickened polyurethane (PU)-based aqueous dispersion containing multi-layered mica pigments using a direct coating method. Colour changing textile coatings with the latest generation of layered mica pigment (EP) have a promising future for functional purposes such as authentication and aesthetic eye-catching applications. LÄS MER