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 19 of 19 for “"UV curing"”.
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Some aspects of free radical polymerisation in UV-curing
… photocalorimetry,bulk polymerisation and the curing of thin films that 1PM acts as a physical quencher for the triplet state of IRG-907 and that it is a very poor hydrogen donor. Sensitisation of IRG-907 by lix was also investigated and it wasconfirmed that lix can sensitise the -cleavage of …
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Towards a more sustainable world: UV-curing & 3D printing of bio-based monomers: Synthesis and characterization of bio-derived monomers for cationic and radical UV-curing
L'abstract è presente nell'allegato / the abstract is in the attachment
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Finite element analysis of adhesive contact interface in continuous 3D printing
… hindered by the undesired adhesive forces at the curing interface, which is an inevitable consequence of in situ liquid-to-solid phase transition. To overcome this limitation, a bio-inspired super low adhesive interface has been proposed based on the observation of a slippery water layer on the …
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Design,formulation and synthesis of UV/Thermal dual cure, bio-based polyurethane coatings
… cure mechanisms – (a) thermal (or ambient) curing of –OH groups by use of isocyanate cross-linkers, and (b) by UV-curing of acrylate functional groups using appropriate photoinitiators. Thus, this dual-curable system can provide a means to control the degree of curing and hence the …
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Formulation of uv curable resins utilized in vat photo polymerization for the additive manufacturing of gun propulsion charge in 3d printers
… for Additive Manufacturing (AM), utilizing UV laser stereolithography, is a new technique that makes it possible for the fabrication of complex geometries with high dimensional resolution. This layer by layer photopolymerization approach spans various industrial sectors from adhesives, inks …
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Design and engineering of low-cost centimeter-scale repeatable and accurate kinematic fixtures for nanomanufacturing equipment using magnetic preload and potting
… via an adjustable interface composed of UV curing adhesive between the mating kinematic coupling components. The fixture is monitored by a micro-vision system and moved by a six-axis nanopositioner until proper alignment is achieved, at which point the fixture position is permanently set …
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ORMOCER (inorganic-organic hybrid polymer)-zeolite Nanocomposites: Advanced Membrane Materials for Gas Separation
… conventional solution casting method followed by UV-curing. The ORMOCER® resins and cured membranes were analysed using FT-IR, liquid-state 29Si NMR, TG, DSC, SEM, N2 sorption and single-gas permeation measurements. The permeation performance of the membranes was examined using H2, He, CO2, O2 and …
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Design and Processing of Ferrite Paste Feedstock for Additive Manufacturing of Power Magnetic Components
… of solid loading excluding diluent (SLED) and UV illumination time on the achievable aspect ratio of printed feedstock was studied. Yield shear strength (y) of feedstocks composition versus UV-curing time were characterized. We evaluated various phenomenological models reported in the …
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Environmentally friendly hybrid coatings for corrosion protection: silane based pre-treatments and nanostructured waterborne coatings
… for metals and to modify the inner structure of UV curable waterborne organic coatings. In the first part of this thesis thin (hundreds of nanometers) sol-gel films consisting of an experimental mixture of hybrid silicon alkoxides molecules were applied onto aluminium and hot dip galvanized (HDG) …
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Development of hybrid inorganic/organic nanocomposites with enhanced thermal conductivity
… solvent casting followed by ultraviolet-induced (UV-induced) curing; likewise, LPSQ/Al2O3 NCs were prepared by embedding variable loadings of functionalized γ-Al2O3 nanoparticles within the ladder matrices. To elucidate the role of interfacial interactions, LPSQs were synthesized bearing different …
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Microcapsule-based self-protecting coatings
… also developed and demonstrated based on the UV curing of damage-triggered release of a sunlight curable epoxy resin from specially engineered UV-blocking microcapsules. Microcapsules containing as little as 5 wt% carbon black were shown to be sufficiently UV-blocking to form a viable system. …
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Functionalized Polyisobutylene: From Synthesis to Properties and Applications
… of the PIB-PEO graft copolymers. Finally, a UV-cross-linkable IIR was synthesized by chemical modification of IIR backbones with cinnamate moieties. The physical and mechanical properties of the resulting UV-cured IIR polymers were studied.
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Design and synthesis of plant oil-based UV-curable acrylates for sustainable coating applications
A demand in sustainable polymers has been increased because of the environment concerns and saving finite petroleum resources. Plant oils are promising renewable resources to produce environmentally friendly polymer applications. Soybean oil-based resins such as epoxidized soybean oil (ESO) and …
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Exploiting thiol and disulfide reactive groups in photopolymerization and preparation of stimuli-responsive coatings
L'abstract è presente nell'allegato / the abstract is in the attachment
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Chemically and Photochemically Crosslinked Networks and Acid-Functionalized Mwcnt Composites
… tetraacrylate (PETA) were crosslinked under UV radiation (6 passes, 1.42 ± 0.05 W.cm2 for each pass) in the presence of 2,2-dimethoxy-2-phenylacetophenone (DMPA) (1 wt. % of the mixture) UV initiator. DMA demonstrated the presence of broad glass transition regions with a range of Tg's which …
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Part I - Access to UV photocured nanostructures via selective morphological trapping of block copolymer melts. Part II - Morphological phase behavior of poly(RTIL) containing block copolymer melts
A thermally stable photocuring system was developed for high fidelity translation of block copolymer based melt-state morphologies into their equivalent solid analogs. Cationic photoacids were combined with partially epoxidized polyisoprene-b-poly(ethylene oxide) (PI-PEO) block copolymers, forming …
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Enabling New Material and Process Capabilities for Ultraviolet-Assisted Direct Ink Write Additive Manufacturing via Exploration of Material Rheology and Reactivity
Ultraviolet-Assisted Direct Ink Write (UV-DIW) is a material extrusion additive manufacturing (AM) technology in which a viscous ink, often at room temperature, is selectively extruded through a translating nozzle to selectively deposit material. The extruded ink is solidified via UV irradiation …
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Design of advanced biobased photocurable formulations: from dynamic covalent network to composite scaffold for tissue engineering
L'abstract è presente nell'allegato / the abstract is in the attachment
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Towards Realization of an Innovative Li-Ion Battery: Materials Optimization and System Up-Scalable Solutions
… electrodes. Exploiting the versatile nature of UV-induced free-radical photo-polymerisation, novel ready-to-use multiphase electrode/electrolyte composites (MEEC) were developed in which the electrode is conformally coated by the polymer electrolyte. This “one-shot” process was successfully …