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 12 of 12 for “"poly(vinyl pyrrolidone)"”.
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Crystallization behavior of nylon 6/6 and its blends with poly(vinyl pyrrolidone)
… on the blends of an aliphatic crystallizable polyamide (nylon 6/6) and trace quantities of a polar non-crystallizable diluent (poly(vinylpyrrolidone)). This study is based on the preliminary findings of Keith et al. who reported striking morphological changes in nylon 6/6 upon addition of …
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Spectroscopic Characterization of Molecular Interdiffusion at a Poly(Vinyl Pyrrolidone) / Vinyl Ester Interface
Mechanical properties of (woven carbon fiber / vinyl ester matrix) composites can be greatly improved if the interphase between the reinforcing high-strength low-weight fiber and the thermoset resin is made more compliant. In order to improve the adhesion of the vinyl ester matrix to the carbon …
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Electrospinning for pharmaceutical applications
… of an active pharmaceutical ingredient (API), polymer and solvent, has shown great promise for producing final solid dosage forms with minimal process steps. In this thesis, we explore the use of electrospinning to produce fiber mats containing either amorphous or crystalline API, aiming to …
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Influence of the Interphase on the Mechanical Properties of Nylon 66 Composites
… altered by the addition of a specific diluent, poly(vinyl pyrrolidone), as either a blend to the matrix or as a fiber sizing. The diluent serves to dampen nucleation on the fiber surface thus causing the interphase to change from transcrystalline in nature to spherulitic. The changes in …
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Development of novel polymeric microneedle systems for long-acting intradermal delivery of poorly soluble compounds
… This thesis focuses on developing the novel polymeric microneedle systems to deliver poorly soluble molecules intradermally in a sustained manner.<br/><br/><br/>In this thesis, amphotericin B, a model poorly soluble drug, was formulated using polymeric microneedle systems to achieve …
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Chemical sensors based on swellable polymer microparticles and molecular imprinted polymers
… thermoresponsive and lightly cross-linked polymer microparticles were prepared for the development of chemical sensors for various target analytes. The swelling and shrinking of the polymer particles as a function of concentration of target analytes has been investigated using turbidity and …
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Synthesis and characterisation of hollow monodisperse silica-titania nanostructures for potential use in targeted delivery of drugs/vaccines/genes
… and core-shell nanoparticles) as expected. Polymers are common excipients in pharmaceutical formulations, especially in nanoparticulate systems for establishing steric stability. Relaxation NMR experiments along with light scattering, revealed interactions between polymer at titania and …
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Altering the fiber-matrix interphase in semicrystalline polymer matrix composites
When many semicrystalline polymers are used as matrix materials in composites, a morphology known as the transcrystalline region is formed on the surface of the reinforcing material. This region introduces a new crystalline structure to the system that is different from that of the bulk matrix …
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Development of Innovative Ultra-Filtration Fibre Technologies for Waste-Water Treatment in Membrane Bio-Reactors (MBR)
… membrane-foulant interactions. Modifications of polymer concentration will offer deeper insight into the role that polymer phase materials have on membrane formation and high strength performance. Further variations in pore-former content will provide a route towards optimising membrane surface …
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Structure-property-processing relationships between polymeric solutions and additive manufacturing for biomedical applications
… manufacturing (AM) creates 3D objects out of polymers, ceramics, and metals to enable cost-efficient and rapid production of products from aerospace to biomedical applications. Personalized products manufactured using AM, such as personalized dosage pharmaceuticals, tissue scaffolds, and …
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Compressive Mechanics Of A Poly (Vinyl Alcohol)-Based Hydrogel System For The Replacement Of The Knee Meniscus
… in the image of the native meniscus. Blends of poly (vinyl alcohol) PVA and poly (vinyl pyrrolidone) (PVP) present a potential solution. PVA has shown similar characteristics to soft tissues. PVP further stabilizes the hydrogel network. This work is the mechanical characterization of PVA/PVP …
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Self-assembly behavior in hydrophilic block copolymers
Block copolymers are receiving increasing attention in the literature. Reports on amphiphilic block copolymers have now established the basis of their self-assembly behavior: aggregate sizes, morphologies and stability can be explained from the absolute and relative block lengths, the nature of the …