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 15 of 15 for “"suspension polymerization"”.
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Synthesis and applications of functional magnetic polymer beads; synthesis and mass spectrometry analysis of model peptides
… magnetic polymer beads. The traditional suspension polymerization approach was used to synthesize polystyrene-iron oxide (Fe 3 O 4 ) based magnetic beads. The beads were coupled to different surface functional groups. The Fe 3 O 4 particles were encapsulated into a polystyrene shell. The …
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Synthesis and comprehensive studies of nanogels for enhanced oil recovery
… and neutral charges were synthesized through suspension polymerization. The morphology, size distribution, and zeta potential of nanogels were elucidated by corresponding technologies, such as scanning electron microscopy and dynamic light scattering. The ability of nanogels in oil-water …
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Experimental study on enhanced oil recovery (EOR) mechanisms of nanogel combining with low salinity water for carbonate reservoirs
… used in this study was synthesized through the suspension polymerization process in our lab. The morphology, size distribution, and zeta potential were studied for nanogel dispersed in brine with variable ionic strength. The injectivity of nanogel was elucidated at first to ensure their in-depth …
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The Design of Hydrogel Polymers for Artificial Liver Support Systems.
… by freezing a monomer-solvent mixture prior to polymerization thereby creating a polymer matrix with large macropores running through it. These materials are interesting because of their greater permeability to large molecules, a property of interest if the dialytic method of removing blood …
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A Systems Approach to the Modeling and Control of Molecular, Microparticle, and Biological Distributions
… robustness analysis. Free radical bulk polymerization is the model system for molecular distributions. In situ ATR-FTIR spectroscopy was used to determine monomer concentration; off-line gel permeation chromatography was used to determine the molecular weight distribution. Kinetic …
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Microencapsulation of reactive amines and isocyanates and their application to self-healing systems
… microcapsules are synthesized by interfacial polymerization of a polyurea about a droplet of amine by means of suspension polymerization. Capsules are subsequently isolated and analyzed for content, and shown to contain reactive amine. The microcapsules containing reactive amine are employed …
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Magnetoacoustic chemical sensors based on swellable polymer microspheres
… water loading, and 2-hydroxyethyl methacrylate polymerization.</p><p>Poly(vinylbenzyl chloride) (polyVBC) microspheres were prepared by suspension polymerization and then derivatized to introduce dicarboxylate groups onto the polymer backbone. Poly(vinylbenzyl chloride-trichlorophenyl acrylate) …
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Synthesis and Characterization of Nanoporous Copolymers with Potential Gas Storage Applications
… maleimide were synthesized via free radical suspension polymerization. The incorporation of these functionalized, chain stiffening, Tg enhancing comonomers raised the Tgs of precursor polymers before they were crosslinked. Surface areas of these HCPs, obtained from nitrogen …
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Chemical sensors based on swellable molecularly imprinted polymer microspheres in a hydrogel
… acid) (poly NIPA-AAc) particles by suspension polymerization in a perfluorocarbon solvent using ultrasonic emulsion technique. The particles were crosslinked with 5% of N, N'-methlene-bis-acylamide (MBA) using 20% fluorinated surfactant as a stabilizer. The resulting particles were …
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Functional Polymers Containing Semi-Rigid Alternating Sequences
… groups arising from the strictly alternating copolymerization. The research in this dissertation is focused on the synthesis, characterization, and potential application of functionalized copolymers that contain semi-rigid alternating copolymer sequences. The fluorescence properties of a series …
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Chemical sensors based on swelling polymer microspheres and uncrosslinked fluorescently-labelled molecularly imprinted polymers
… metal ion concentration have been prepared by suspension and dispersion polymerization respectively. For the pH sensor, poly (vinylbenzylchloride) was prepared by suspension polymerization using the Shirazu porous glass (SPG) method. The particles were lightly crosslinked with divinylbenzene …
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Structure-property-processing relationships between polymeric solutions and additive manufacturing for biomedical applications
… three types of AM processes, namely vat photopolymerization, binder jetting, and powder bed fusion. Binder jetting, vat photopolymerization, and powder bed fusion require different viscosity and powder requirements depending on the printer capabilities, and if the material is neat or in …
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Polymerization in emulsion microdroplet reactors
… as chemical reactors for execution of complex polymerization chemistries to develop unique and functional particle materials. Emulsions are dispersions of immiscible fluids where one fluid usually exists in the form of drops. Not surprisingly, if a liquid-to-solid chemical reaction proceeds to …
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Touch-and-go chemistry: development of materials for and demonstration of a contact-initiated polymerization
… (BPO) groups which co-initiate free radical polymerizations. The mechanism by which they co-initiate requires contact between the DMA and BPO molecules. When DMA and BPO were conjugated to complementary particles, a free radical polymerization was observed following contact between the …
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Spiropyrans as color-generating mechanophores
Due to the size scale of the molecules they work with, chemists are normally limited to indirect means of inducing and controlling chemical reactions. Sometimes, the inherent reactivity and structure of the reactants and the properties of the products such as thermodynamic stability can be relied …