Search for dissertations about: "grafting"

Showing result 6 - 10 of 287 swedish dissertations containing the word grafting.

2. 6. Polymer Nanocomposites in Thin Film Applications

   Author : Linda Fogelström; Anders Hult; José M. Kenny; KTH; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Nanocomposites; hyperbranched polymers; montmorillonite; clay nanoparticles; exfoliated; coatings; crosslinking; TEM; XRD; mechanical properties; thermal properties; cellulose nanofibers; Atom Transfer Radical Polymerization; Ring-Opening Polymerization; poly ε-caprolactone ; surface modification; grafting; interfacial adhesion; Polymer chemistry; Polymerkemi;

   Abstract : The introduction of a nanoscopic reinforcing phase to a polymer matrix offers great possibilities of obtaining improved properties, enabling applications outside the boundaries of traditional composites. The majority of the work in this thesis has been devoted to polymer/clay nanocomposites in coating applications, using the hydroxyl-functional hyperbranched polyester Boltorn® as matrix and montmorillonite clay as nanofiller. READ MORE

4. 7. Tuning Properties of Surfaces and Nanoscopic Objects using Dendronization and Controlled Polymerizations

   Author : Emma Östmark; Eva Malmström; Heikki Tenhu; KTH; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Dendrimers; dendronized polymers; cellulose; Atom Transfer Radical Polymerization; Ring-Opening Polymerization; surface modification; grafting; superhydrophobic; amphiphilic polymer; block copolymer; Atomic Force Microscopy; Polymer chemistry; Polymerkemi;

   Abstract : In this study, dendronization and grafting via controlled polymerization techniques, atom transfer radical polymerization (ATRP) and ring-opening polymerization (ROP), have been explored. Modification of surfaces and cellulose using these techniques, which enable grafting of well-defined polymer architectures, has been investigated. READ MORE

5. 8. Anionic Graft Copolymers with Poly(ethylene oxide) Side-Chains; Synthesis, Solution Properties and Ion Conduction

   Author : Helene Dérand; Centrum för analys och syntes; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; dieletric properites; ion conduction; solution properties; aggregation; amphiphilic polymers; poly ethylene oxide ; preparation; grafting; Polymer technology; biopolymers; Polymerteknik;

   Abstract : The research underlaying this thesis involves synthesis and characterization of well-defined anionic graft copolymers carrying poly(ethylene oxide) (PEO) side-chains. Two different grafting techniques were used. Backbone polymers were prepared through radical terpolymerization of maleic anhydride, styrene and an additional comonomer. READ MORE

6. 9. Dopamine neurons in ventral mesencephalon : interactions with glia and locus coeruleus

   Author : Elisabet Berglöf; Ingrid Strömberg; Stephen B. Dunnett; Umeå universitet; []
   Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Parkinson’s disease; ventral mesencephalon; nerve fiber formation; glia; locus coeruleus; grafting; antioxidant-enriched diet; Histology; Histologi;

   Abstract : Parkinson’s disease is a progressive neurodegenerative disorder, characterized by a depletion of the dopaminergic neurons in the substantia nigra. The cause of the disease is yet unknown but age, oxidative stress, and neuroinflammation are some of the features involved in the degeneration. READ MORE

7. 10. Betulin-modified cellulosic textile fibers with improved water repellency, hydrophobicity and antibacterial properties

   Author : Tianxiao Huang; Monica Ek; Mats Johansson; KTH; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Antibacterial; Betulin; Biorefinery; Cellulose; Grafting; Coating; Hydrophobicity; Textile; Water repellency; Fiber- och polymervetenskap; Fibre and Polymer Science;

   Abstract : Textiles made from natural sources, such as cotton and flax, have advantages over those made of synthetic fibers in terms of sustainability. Unlike major synthetic fibers that have a negative impact on the environment due to poor biodegradability, cotton cellulose is a renewable material. READ MORE