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 13 of 13 for “"Co-polymerization"”.
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Block co-polymerization by transformation reactions
… use the transformation of anionic to metathesis polymerization to produce block co-polymers of styrene-b-pentenylene using WC16 /PStLi and WC16/PStLi/ AlEtC12 catalyst systems. Analysis of the products using SEC and 1H and 13C NMR spectroscopy enabled mechanisms for metathesis initiation …
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Elution of Metronidazole and Gentamicin from Polymethylmethacrylate Beads
Ten polymethylmethacrylate (PMMA) beads containing metronidazole (3 concentrations); gentamicin sulfate; or metronidazole and gentamicin sulfate were immersed in 5 ml of phosphate buffered saline in triplicate. Eluent was replaced at specified time intervals for 1 day (1, 3, 6, 12 and 24 hours), …
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Design of Cleavable Monomers and Cross-Linkers for the Synthesis of Degradable Polymer Architectures
Degradable materials, with different chemical compositions and various polymer architectures, are desirable for countless purposes, ranging from biological applications to recyclability of plastic waste. The creation of brand-new materials with useful, desired properties and built-in degradability …
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Development of Main Group Systems for Small Molecules Activation
… to transition metal catalyst. Since the first discovery in 2006, FLP has found diverse applications in areas such as small molecules activation and catalysis. The present thesis has two major directions: 1) find new types of FLP; 2) demonstrate their unusual reactivity. Alkali metal species are …
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Design of multi-functional hydrogel for cell therapies
… a variety of cellular function. However, the conventional hydrogel design is plagued by complex dependencies between hydrogel properties; stiffness, permeability, density of cell adhesion molecules, and mineralization capacity. The objective of this research is to decouple or tune the …
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Towards polyethylene-based materials with non-alternatively incorporated carbon monoxide monomer
The synthesis of ethylene/carbon monoxide copolymers (polyketones) was pursued via insertion polymerization methods through palladium(II) and nickel(II) catalysis. Specifically, phosphine sulfonate palladium(II) precatalysts derived from the in situ complexation of palladium(II) acetate and …
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Functional and complex topological applications of plasma polymerized ultrathin films
… with an emphasis on the solvent-less, dry polymerization process to introduce post-deposition functionality, robustness, and shape preservation. Two major classes of materials are the subject of this study: biological monomers, specifically the amino acids tyrosine and histidine and …
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Novel type-II nanocrystal quantum dots and versatile oligomeric phosphine ligands
… Type-II band engineered quantum dots (CdTe/CdSe(core/shell) and CdSe/ZnTe(core/shell) heterostructures) are synthesized by chemical means. The optical properties of these type-II quantum dots are studied in parallel with their type-I counterparts. The spatial distributions of carriers are …
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Ageing under extreme ph conditions, modification and characterization of ultrafiltration and nanofiltration membranes
… fouling resistance have been prepared by graft copolymerization of a polyelectrolyte hydrogel on the top of an UF membrane. A comprehensive literature review, concerning the main foulants, the most common cleaners, the consolidated techniques to determine cleaning effectiveness, the parameters …
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Enhanced surface functionality via plasma modification and plasma deposition techniques to create more biologically relevant materials
… more biologically relevant materials has become central to a wide range of research programs. One of the primary challenges in this field is creating highly functionalized surfaces without modifying the underlying bulk material. Traditional wet chemistry techniques utilize thin film …
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Experimental spectroscopic and theoretical studies of organic compounds and polymeric structures
… a model with hydrogen-bonded water molecules, in conjunction with the conductor-like polarizable continuum solvation method. The vibrational spectra were computed at the optimised molecular geometry, enabling normal coordinate analysis, which yielded satisfactory agreement with the experimental IR …
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Modelling of colloidal dynamics in complex soft matter systems
… into three parts and funded by the multinational company Synthomer LTD, is devoted to the modelling of the complex dynamics among colloidal particles in soft matter systems which are influenced by the interplay between Brownian motion, the common denominator among all the projects, and other …
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Design, Fabrication and Applications of Organic-Inorganic Hybrid Systems
… against the template particles. A series of colloidal template particles including, polystyrene, poly (vinylcaprolactam) and poly (N-isopropylacrylamide) was used for the deposition of a variety of metal oxides/hydroxide nanoparticles. A classical surfactant free co-polymerization process was …