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Visar resultat 11 - 15 av 16 avhandlingar som matchar ovanstående sökkriterier.

  1. 11. Long-term performance of polymeric materials in nuclear power plants

    Författare :Payam Pourmand; Ulf W. Gedde; Sue Burnay; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; EPDM; thermal ageing; radiation ageing; portable NMR spectroscopy; modulus profiling; condition monitoring; plasticizer migration; Kemi; Chemistry;

    Sammanfattning : Access to energy is crucial for modern societies to function sustainably. In addition, nuclear power has for a long time been considered a reliable source of energy. However, the majority of nuclear power plants are reaching the end of their service lifetimes, and it is crucial to verify that every component can withstand the added service time. LÄS MER

  3. 12. Controlling Polylactide Degradation through Stereocomplexation and Lactic Acid Based Additives

    Författare :Sofia Regnell Andersson; Minna Hakkarainen; Ann-Christine Albertsson; Marek Kowalczuk; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Polylactide; stereocomplex; plasticizer; degradation; degradation products; ESI-MS;

    Sammanfattning : The successful use of degradable materials in new applications depends on our ability to control the degradation process. A number of aspects need to be evaluated including degradation rate, the onset of degradation and the nature, formation and release of degradation products. LÄS MER

  4. 13. Effects of plasticizing and crosslinking on coatings based on blends of starch-PVOH and starch-lignin

    Författare :Asif Javed; Henrik Ullsten; Peter Rättö; Lars Järnström; Douglas Bousfield; Karlstads universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Citric acid; Glycerol; Polyethylene glycol; Barrier coatings; Starch; Lignin; Mechanical properties; Poly vinyl alcohol ; Creasing; Adhesion; Cross-linking; Extrusion coating; Chemical Engineering; Kemiteknik;

    Sammanfattning : A barrier material is usually needed on a fiber-based food package to protect the packed food from gases and moisture and thus maintain its quality. Barrier materials presently used in food packaging applications are mostly petroleum-based polymers. LÄS MER

  5. 14. Processing and Development of Wheat Gluten Plastics

    Författare :Henrik Ullsten; Mikael S. Hedenqvist; Nathalie Gontard; KTH; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Wheat Gluten; Extrusion; Processing; Chemistry; Kemi;

    Sammanfattning :  Renewable packaging materials are of interest for a more sustainable environment. Wheat gluten is one of the most interesting candidates to replace petroleum-based oxygen-barrier polymers for packaging applications. LÄS MER

  7. 15. Environmentally friendly plasticized PVC by means of nanotechnology

    Författare :Henrik Petersen; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; gas permeability; mechanical properties; organomodification; Plasticized PVC; Hansen Solubility Parameters; nanoclay;

    Sammanfattning : Polyvinyl chloride (PVC) is used in a wide range of industrial areas. Manufacturing of PVC products requires use of additives, such as plasticizers, heat stabilizers and flame retardants. LÄS MER