Sökning: "Sigbritt Karlsson"

Visar resultat 6 - 10 av 12 avhandlingar innehållade orden Sigbritt Karlsson.

  1. 6. Model for End of Life Treatment of Polymer Composite Materials

    Författare :Anna Hedlund-Åström; Jan-Gunnar Persson; Conrad Luttropp; Sigbritt Karlsson; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; polymer composites; material recycling; energy recovery; environmental effects; recommendations; waste treatment model; Environmental engineering; Miljöteknik;

    Sammanfattning : Because of increasing environmental demands, especially on dealing with products end of life phase, product manufacturers and designers must consider the future disposal of their products. For conventional materials like steel and aluminium well-functioning recycling methods exists. LÄS MER

  3. 7. Antimicrobial Polymer Composites for Medical Applications

    Författare :Peter Kaali; Sigbritt Karlsson; Ferruccio Doghieri; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; medical polymers; antimicrobial; body fluids; degradation; Polymer chemistry; Polymerkemi;

    Sammanfattning : The current study and discuss the long-term properties of biomedical polymers in vitro and invivo and presents means to design and manufacture antimicrobial composites. Antimicrobialcomposites with reduced tendency for biofilm formation should lead to lower risk for medicaldevice associated infection. LÄS MER

  4. 8. Long-term Properties of Sustainable Polymeric Materials : Mechanical Recycling and Use of Renewable Resources

    Författare :Emma Strömberg; Sigbritt Karlsson; Amparo Ribes-Greus; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Sustainable materials; mechanical recycling; polyolefin; reprocessing; accelerated ageing; chromatography; biofilm; microenvironment chamber; environmental degradation; biocomposite; nanocomposite; Polymer chemistry; Polymerkemi;

    Sammanfattning : New strategies for management of the accumulating amounts of plastic waste are required, to achieve a sustainable development in terms of material production and use. After service life, the materials should be recovered and recycled efficiently to provide a valuable resource for future applications. LÄS MER

  5. 9. Modelling the degradation processes in high-impact polystyrene during the first use and subsequent recycling

    Författare :Francisco Vilaplana; Sigbritt Karlsson; Monika Ek; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Recycling; high-impact polystyrene; degradation; quality analysis; thermal analysis; vibrational spectroscopy; chromatography techniques; thermo-oxidation; reprocessing; dynamic mechanical properties; polybutadiene microstructure.; Polymer chemistry; Polymerkemi;

    Sammanfattning : Polymers are subjected to physical and chemical changes during their processing, service life, and further recovery, and they may also interact with impurities that can alter their composition. These changes substantially modify the stabilisation mechanisms and mechanical properties of recycled polymers. LÄS MER

  7. 10. Quality Assessment for the Improved Use of Recycled Styrenic Polymers : Application to packaging and electronic waste

    Författare :Francisco Vilaplana; Sigbritt Karlsson; Alfonso Jimenez; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Polymer chemistry; Polymerkemi;

    Sammanfattning :  Polymeric waste materials should be considered resources for the manufacture of new products through recycling processes, with a similar status as virgin fossil-based plastics and biopolymers from renewable resources. Several efforts can be done to achieve this qualitative quantum leap and introduce recycled products in the market with competitive performance. LÄS MER