Sökning: "oligomer synthesis"

Visar resultat 1 - 5 av 13 avhandlingar innehållade orden oligomer synthesis.

1. 1. Plasticized Poly (lactic acid) Films - Preparation and Properties

   Författare :Nadia Ljungberg; Centrum för analys och syntes; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; phase separation; aging; thermal properties; dynamic mechanical properties; processing; film preparation; oligomer synthesis; poly lactic acid ; plasticizers; migration; cold crystallization; Polymer technology; biopolymers; Polymerteknik;

   Sammanfattning : The development of biodegradable polymers from renewable resources is of importance in order to prevent the depletion of fossil fuels and the increasing emissions of carbon dioxide to the atmosphere caused by the commodity plastics of today. However, to be able to replace these non-environmentally friendly materials, production costs of biodegradable polymers have to be decreased and their physical properties need to be enhanced. LÄS MER

3. 2. degradable electroactive polymers: Synthesis, Macromolecular architecture and scaffold design

   Författare :Baolin Guo; Ann-Christine Albertsson; Patric Jannasch; KTH; []
   Nyckelord :Poly lactide ; poly ε-caprolactone ; ring-opening polymerization; carboxyl-capped aniline trimer; carboxyl-capped aniline pentamer; phenyl amino-capped aniline tetramer; coupling reaction; DCC DMAP system; degradability; electroactivity; conductivity; macromolecular architecture; chitosan; hydrogel; block copolymer; functionalization; oxidative coupling reaction; self-assembly; toxicity; tubular porous scaffold; neural tissue engineering.;

   Sammanfattning : Electrically conducting polymers induce specific cellular responses at the molecular level. One of the crucial limitations of the use of conducting polymers in tissue engineering is their inability to degrade. LÄS MER

4. 3. Synthesis, characterization and molecular architecture of electroactive and degradable polymers

   Författare :Baolin Guo; Ann-Christine Albertsson; Anna Finne Wistrand; Ann Cornell; Mark Rutland; KTH; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Poly L; L-lactide ; poly ε-caprolactone ; ring-opening polymerization; carboxyl-capped aniline trimer; carboxyl-capped aniline pentamer; coupling reaction; DCC DMAP system; degradability; electroactivity; conductivity; macromolecular architecture; tissue engineering; Polymer chemistry; Polymerkemi;

   Sammanfattning : The third-generation biomaterials are designed to stimulate specific cellular responses at the molecular level. Recent studies have shown that electrical signals regulate cellular activities including cell adhesion, migration, proliferation and differentiation. LÄS MER

5. 4. Synthesis and properties of pi-conjugated polymers for organic photovoltaics

   Författare :Renee Kroon; Chalmers tekniska högskola; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; organic photovoltaics; structure-property relationships; Conjugated polymers; energy level engineering;

   Sammanfattning : Organic photovoltaics is a renewable energy technology able to solve global warming and the upcoming energy gap, issues that both originate from fossil fuel consumption. Out of all renewable energy sources, the Sun is the only source that produces enough energy to fulfill all our energy needs, now and in the future. LÄS MER

7. 5. Exploring fatty acid derivatives from renewable resources as raw materials for coating applications

   Författare :Samer Nameer; Mats Johansson; Mats Martinelle; Dean Webster; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; epoxy; vegetable oils; birch bark; thermoset; bio-based; fatty acid; renewable resources; Fiber- och polymervetenskap; Fibre and Polymer Science;

   Sammanfattning : In the work presented herein, epoxy fatty acid derivatives were explored in the formation of thermosets for coating applications. The epoxy fatty acid derivatives were obtained from renewable resources such as birch tree bark and epoxidized linseed oil. LÄS MER