Search for dissertations about: "polymerization catalyst"

Showing result 1 - 5 of 27 swedish dissertations containing the words polymerization catalyst.

2. 1. Macromolecular synthesis of functional degradable aliphatic polyesters and porous scaffold design

   Author : Sofia Målberg; Ann-Christine Albertsson; Anders Södergård; KTH; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; functional polyesters; condensation polymerization; L-lactide; ε-caprolactone; triblock copolymer; mechanical properties; porous scaffolds; tissue engineering; ring-opening polymerization; Bi III acetate; creatinine; stannous 2-ethylhexanoate; enzyme; degradation products; Polymer chemistry; Polymerkemi;

   Abstract : There is an increasing demand for new materials in biomedical applications with material properties that are highly specific for each application area. The search for new materials requires the creation of materials with suitable mechanical properties, functionalities, three-dimensional structures and a controlled degradation profile. READ MORE

4. 2. Strategies for cellulose fiber modification

   Author : Per Persson; KTH; []
   Keywords : Candida antarctica lipase B; cationic catalysis; cellulose-binding module; dendrimer; enzymatic polymerization; fiber modification; silica-cast replica; sol-gel mineralization; organocatalysis; xyloglucan endotransglycosylase;

   Abstract : This thesis describes strategies for and examples ofcellulose fiber modification.The ability of an engineered biocatalyst, acellulose-binding module fused to theCandida antarcticalipase B, to catalyze ring-openingpolymerization of e-caprolactone in close proximity tocellulose fiber surfaces was explored. READ MORE

5. 3. Functional Copolymers of Polyvinylpyrrolidone

   Author : Jonas Engström; Chalmers tekniska högskola; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; suspension polymerization; functional monomers; 1-vinylpyrrolidin-2-one; copolymerization; swelling; crosslinking; solid-phase synthesis; drug delivery vehicles.; phase-selective solubility; beads; Polyvinylpyrrolidone;

   Abstract : In many ways, polyvinylpyrrolidone (PVP) has a unique combination of chemical and physical properties. Unlike most polymers it is soluble in water as well as a number of organic solvents. PVP also has excellent film forming properties, outstanding chemical stability, complexing ability, low toxicity, and good adherence to many different substrates. READ MORE

6. 4. Synthesis of End-functionalized Polyesters byRing-Opening Polymerization of ε-Caprolactone

   Author : Jessica Schröder; Mittuniversitetet; []
   Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Chemistry; Kemi;

   Abstract : The main objective of this work was to investigate the ring-opening polymerizations of cyclic esters by enzyme catalysis and cationic activated monomer polymerization in the search for new polymer materials and fiber-based composites. Candida antarcica lipase B was used for end-functionalization of poly(ε-caprolactone) and in the copolymerization of D,L-lactide and ε-caprolactone. READ MORE

7. 5. Dendrimers and dendronized polymers : synthesis and characterization

   Author : Andreas Nyström; Anders Hult; A. Dieter Schlüter; KTH; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Dendrimers; dendronized polymers; atom transfer radical polymerisation; ring-opening metathesis polymerization; reversible addition-fragmentation chain transfer polymerization; 2; 2-bis methylol propionic acid; tri-block copolymers; rheology; differential scanning calorimerty; 1H-NMR self-diffusion; Polymer chemistry; Polymerkemi;

   Abstract : The goal of this work was to synthesize complex macromolecular architectures such as dendrimers and dendronized polymers, and evaluate the effect from the dendrons on the optical and material properties. The work presented in this doctoral thesis, Dendrimers and Dendronized Polymers - Synthesis and Characterization, is divided into one minor and one major part. READ MORE