Search for dissertations about: "poly"

Showing result 1 - 5 of 738 swedish dissertations containing the word poly.

  2. 1. Covalent Vapor-Phase Grafting of Degradable Polymers

    Author : Martina Källrot; Ann-Christine Albertsson; Maria Nowokowska; KTH; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Vapor-phase grafting; covalent surface modification; functionalization; solvent-free grafting; sub-micron patterned topography; scaffolds; degradable polymers; poly L-lactide ; poly ε-caprolactone ; poly trimethylene carbonate ; poly L-lactide-co-glycolide ; poly 1; 5-dioxepan-2-one-co-L-lactide ; poly ε-caprolactone-co-L-lactide ; N-vinylpyrrolidone; maleic anhydride; acrylamide; acrylic acid; hyaluronic acid; in vitro degradation; Gasfasympning; kovalent ytmodifiering; funktionalisering; lösningsmedelsfri ympning; sub-micrometer mönstrad topografi; nedbrytbara polymerer; poly L-laktid ; poly ε-kaprolakton ; poly trimetylen karbonat ; poly L-laktid-co-glykolid ; poly 1; 5-dioxepan-2-one-co-L-laktid ; poly ε-kaprolakton-co-L-laktid N-vinylpyrrolidon; maleinsyraanhydrid; akrylamid; akrylsyra; hyaluronsyra; in vitro nedbrytning; Polymer chemistry; Polymerkemi;

    Abstract : Gasfasympning är en del i den moderna strategin för optimering av den molekylära designen av biomaterial. Kovalent ytmodifiering med hydrofila vinylmonomerer och koppling med bioaktiva grupper används för att öka biokompatibiliteten och bioaktiviteten hos biomaterialen.. READ MORE

  4. 2. Covalent Surface Modification of Degradable Polymers for Increased Biocompatibility

    Author : Martina Källrot; Ann-Christine Albertsson; Mikael Lindström; KTH; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Vapor phase grafting; covalent surface modification; solvent free; nano patterned topography; degradable polymers; poly ε-caprolactone ; poly L-lactide ; poly lactide-co-glycolide ; poly trimethylene carbonate ; N-vinylpyrrolidone; maleic anhydride; acrylamide; Gasfasympning; kovalent ytmodifiering; lösningsmedelsfri; nedbrytbara polymerer; nanomönstrad topografi; poly L-laktid ; poly ε-kaprolakton ; poly laktid-co-glykolid ; poly trimetylen karbonat ; N-vinylpyrrolidon; maleinsyraanhydrid; akrylamid; Polymer chemistry; Polymerkemi;

    Abstract : Degradable polymers have gained an increased attention in the field of biomedical applications over the past decades, for example in tissue engineering. One way of improving the biocompatibility of these polymers is by chemical surface modification, however the risk of degradation during the modification procedure is a limiting factor. READ MORE

  5. 3. POLYPEPTIDES - STRUCTURES AND INTERACTIONS IN MONOLAYERS AND AQUEOUS SOLUTIONS

    Author : Helen Sjögren; Fysikalisk kemi; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Physical chemistry; Fysikalisk kemi; tyrosine ; co-poly-L lysine; phenylalanine ; co-poly-L- lysine; poly-L-glutamate; poly-L-lysine; poly-L-valine; poly-L-isoleucine; poly-gamma-methyl-L-glutamate; poly-L-leucine; monolayer; Langmuir-Blodgett film; CD spectroscopy; random coil; alpha-helix; surfactant stabilisation; polypeptide; polyamino acid;

    Abstract : The aim of this thesis work is to understand and be able to control polypeptide conformation and interactions at interfaces and in solution by changing the solution conditions. For this purpose simple model polypeptides, so-called polyamino acids, have been investigated at the air-liquid interface, as well as in aqueous solutions. READ MORE

  6. 4. Poly (butylene succinate) and poly (butylene adipate) : quantitative determination of degradation products and application as PVC plasticizers

    Author : Annika Lindström; Minna Hakkarainen; Ann-Christine Albertsson; KTH; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Biochemistry; solid phase extraction; degradation products; poly butylene succinate ; poly butylene adipate ; GC-MS; PVC; plasticizer; Biokemi; Biochemistry; Biokemi;

    Abstract : A solid phase extraction (SPE) method was developed for simultaneous extraction of dicarboxylic acids and diols formed during hydrolysis of poly(butylene succinate), PBS, and poly(butylene adipate), PBA. The developed SPE method and subsequent GC-MS analysis were used to extract, identify and quantify low molecular weight products migrating from linear and branched poly(butylene adipate) (PBA) and poly(butylene succinate) (PBS) during aging in aqueous media. READ MORE

  7. 5. Electronic and optical properties of conducting polymers from quantum mechanical computations

    Author : Amina Mirsakiyeva; Anna Delin; Igor Zozoulenko; KTH; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; density functional theory; DFT; Car-Parrinello molecular dynamics; CPMD; tigh-binding; poly 3; 4-ethylenedioxythiophene ; PEDOT; selenium; PEDOS; tellurium; PEDOTe; poly p-phenylene ; poly para-phenylene ; poly 1; 4-phenylene ; naphthobischalcogenadiazoles; Fysik; Physics;

    Abstract :     Conductive polymers are also known as "organic metals" due to their semiconducting properties. They are found in a wide range of applications in the field of organic electronics. However, the growing number of experimental works is not widely supported with theoretical calculations. READ MORE