Sökning: "poly 3"

Visar resultat 1 - 5 av 306 avhandlingar innehållade orden poly 3.

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

    Författare :Martina Källrot; Ann-Christine Albertsson; Maria Nowokowska; KTH; []
    Nyckelord :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;

    Sammanfattning : 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.. LÄS MER

  3. 2. Microbial production of 3-hydroxypropionic acid and poly(3-hydroxypropionate): Investigation of Lactobacillus reuteri propanediol utilization pathway enzymes

    Författare :Ramin Sabet Azad; Bioteknik; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Platform chemicals; biopolymers; 3-hydroxypropionic acid; 3-hydroxypropionaldehyde; glycerol; poly 3-hydroxypropionate ; polyhydroxyalkanoates; Escherichia coli; Lactobacillus reuteri; propanediol utilization pathway; propionaldehyde dehydrogenase; biotransformation; cofactor regeneration; NADH oxidase;

    Sammanfattning : Concerns regarding environmental issues such as greenhouse gas emissions and climate change have led to a shift within the research community and chemical and energy industry sectors for finding sustainable routes for producing fuels and chemicals from renewable resources, thereby minimizing our dependence on petroleum. The C3-chemical 3-hydroxypropionic acid has been identifed as a top candidate for the biobased chemical industry. LÄS MER

  4. 3. Electronic and optical properties of conducting polymers from quantum mechanical computations

    Författare :Amina Mirsakiyeva; Anna Delin; Igor Zozoulenko; KTH; []
    Nyckelord :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;

    Sammanfattning :     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. LÄS MER

  5. 4. Aluminium oxide - poly(ethylene-co-butylacrylate) nanocomposites : synthesis, structure, transport properties and long-term performance

    Författare :Patricia Nordell; Ulf Gedde; Lars Wågberg; Minna Hakkarainen; KTH; []
    Nyckelord :nanocomposite; nanoparticles; aluminium oxide; poly ethylene-co-butyl acrylate ; silanization; dispersion; Irganox 1010; antioxidant; OIT; sorption kinetics; water; nanokomposit; nanopartiklar; aluminium oxid; poly eten-co-butyl akrylat ; silanisering; dispergering; Irganox 1010; antioxidant; OIT; vattenupptag.;

    Sammanfattning : Polymer nanocomposites are promising materials for dielectrical use in high voltage applications and insulations. This work presents a study of nanocomposites based on poly(ethylene-co-butyl acrylate) with two different comonomer compositions and two different aluminium oxide nanoparticles. LÄS MER

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

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

    Sammanfattning : 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. LÄS MER