Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 29 for “"Polylactide"”.
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Crystallization kinetics of polylactide and its blends
… investigate a polymerization method to produce polylactides of desired molecular weights. The polymers PLA-L and PLA-DL produced were then utilized to make blends of semicrystalline/amorphous components. The compatibility of the blends was investigated by determining their Tg with a DSC. …
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Synthesis and Characterization of Surface-Functionalized Magnetic Polylactide Nanospheres
Polylactide homopolymers with pendent carboxylic acid functional groups have been designed and synthesized to be studied as magnetite nanoparticle dispersion stabilizers. Magnetic nanoparticles are of interest for a variety of biomedical applications including magnetic field-directed drug delivery …
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A Study of End-functionalized Polylactide based Thin Films for Biomedical Applications
… important design factors for a nanostructured polylactide scaffold for tissue engineering. This work focused on two important design aspects of tissue engineering: Topography and Chemistry. The specific goal of the work was to understand how topography and chemistry (end functionalization of …
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Mechanical Performance of Industrial Hemp Fibre Reinforced Polylactide and Unsaturated Polyester Composites
… properties of industrial hemp fibre reinforced polylactide (PLA) and unsaturated polyester (UPE) composites. Surface treatment of hemp fibres was investigated as a means of improving the fibre/matrix interfacial strength and mechanical properties of hemp fibre reinforced PLA and UPE composites. …
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Biodegradable polymer/clay nanocomposites based on poly(butylene adipate-co-terephthalate) and Polylactide
… use of bio-sourced renewable polymers such as Polylactide (PLA) in biodegradable polymers with desirable properties from petroleum based polymers such as PBAT, this study and its results both directly and indirectly contribute to the technological solutions that address growing environmental …
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Synthesis and Characterization of Polylactide-siloxane Block Copolymers as Magnetite Nanoparticle Dispersion Stabilizers
Polylactide-siloxane triblock copolymers with pendent carboxylic acid functional groups have been designed and synthesized for study as magnetite nanoparticle dispersion stabilizers. Magnetic nanoparticles are of interest in a variety of biomedical applications, including magnetic field-directed …
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Fully-renewable and degradable thermoplastic elastomers.
… poly(3-hydroxybutyrate), polyglycolide, and polylactide (PLA), have high stiffness and tensile strength, but are inherently brittle, thus limiting the potential for these polymers to replace elastic and ductile polymers derived from fossil fuels. The work described in this thesis was directed …
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Mesostructuring of SiCN Materials and Catalysts via Microphase Separation Technique utilizing High-Density Polyethylene Blocks
… template was synthesized from polyethylene-block-polylactide (PEOPL) copolymer by microphase separation technique and selective etching of polylactide block.1H NMR was used to confirm the formation of copolymer. Atomic Force Microscopy (AFM) was used to analyse the microphase separated PEOPL …
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Block Copolymer-derived Porous Polyimides and Carbon for High-Performance Energy Storage
… polyimide separator produced by thermalizing polylactide-b-polyimide-b-polylactide at 280 °C. The mesoporous polyimide separator exhibits a median pore width of 21 nm and a storage modulus of 1.8 GPa. When serving as a dendrite-suppressing separator in lithium-metal batteries, the mesoporous …
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Modification of a DNA Vaccine for Oral Administration in Fish for Aquaculture by Using Non-Microbial Nanoparticles
… administrable formulation with chitosan or polylactide-co-glycolide (PLG). The immune response of hybrid striped bass (Morone saxatilis x Morone chrysops) following oral delivery of a DNA vaccine containing Mycobacterium marinum Ag85A plasmid in either chitosan or PLG nanoparticle …
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Bottlebrush block copolymers for photonic materials
… polyester or polyether macromonomers, including: polylactide, polycaprolactone, or polyethylene glycol. These BBCPs are self-assembled within emulsified droplets into microparticles with a photonic glass architecture that reflects vibrant structural colour. Importantly, a full-colour palette of …
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Development of novel polymeric nanoparticles with tailored architectures and functionalities/
… a novel branched norbornene-polystyrene (PS)-polylactide (PLA)-MM was used to create pseudo-alternating copolymers and miktoarm-BASPs. Transmission electron miscroscopy (TEM) of these star polymers revealed nanoparticles with segregated domains. Also, new cross-linkers were explored containing …
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Well-defined molecular brushes: Synthesis by a "grafting through" strategy and self assembly into complicated hierarchical nanostructures
… methacrylate), poly(t-butyl methacrylate), polylactide, poly(ethylene glycol) and polyhedral oligomeric silsesquioxane: POSS). The high versatility of our strategy is also used to increase the complexity of the resulting molecular brushes, by introducing block structures to either backbone …
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Biodegradable polymers for the sustained release of antisense nucleic acids
… and ribozymes. Polymers such as polylactide, polyglycolide, polyhydroxybutyrate and polyhydroxyvalerate were used due to their biocompatability and non toxic degradation products. Release profiles of antisense nucleic acids from films over 28 days was biphasic, characterised by an …
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Freeform, direct-write assembly of thermoplastics and glasses: Theory, practice, and applications
… for making polymeric medical devices, including polylactide stents and polycarbonate urethane elastomeric surgical mesh. Finally, a protocol is proposed for using an isomalt sacrificial mold to create a tissue-engineered model of the kidney proximal tubule.
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Sustainable Polymers Through Creative Design
… ketone containing polybutadiene (PB) flanked by polylactide (PLA). The thermomechanical properties were controlled based on the relative length of each block while the rate of photodegradation was controlled by the mol% of ketone incorporated into the PB block. Finally, ABA triblock copolymers of …
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Structure-property-processing relationships between polymeric solutions and additive manufacturing for biomedical applications
… and biocompatibility. Other polymers such as polylactide and polyglycolide possess hydrolytically cleavable functionalities, which enables degradation in the body. Non-covalent bonds, such as hydrogen bonding and electrostatic interactions, enable strong connections capable of holding …
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Degradation of polylactic acid in the presence of microsize and nanosize fillers
Polylactide (PLA)-cationic (montmorillonite, MMT) and anionic (hydrotalcite, HT) clay micro- or nanocomposites based on semicrystalline and amorphous polymers and unmodified and organomodified as well as calcined or non-calcined clays at 5wt% concentration are produced by melt mixing. Depending on …
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Novel functionalised biodegradable polymeric micro- and nano-structures for tissue engineering and drug delivery applications
… examined. <br/><br/>In Chapter Three a series of polylactide-b-poly(oligo(ethylene glycol)methacrylate)) (PLA-b-POEGMA) amphiphilic diblock copolymers were prepared using a one-pot simultaneous ROP and RAFT polymerisation method. A series of PLA-b-PMPC amphiphilic diblock copolymers are also …
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