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 16 of 16 for “"Photopolymers"”.
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Novel Photopolymers for Additive Manufacturing
… of novel sustainable and eco-friendly photopolymers with specific functions, which are rapidly printable in mild conditions. In Chapter 1, a general introduction of photo-assisted additive manufacturing techniques and photopolymers is discussed. Chapter 2 and Chapter 3 outline the …
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Fabrication and Characterization of Carbon Nanocomposite Photopolymers via Projection Stereolithography
… the material characterization of nanocomposite photopolymers. A morphological matrix design tool was developed and used to categorically analyze published PSL systems. These results were used to justifying design tradeoffs during the design and fabricate of a new PSL system. The developed system …
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Characterization and Modeling of the Thermal Properties of Photopolymers for Material Jetting Processes
… the thermal conductivities of select PolyJet photopolymers (VeroWhitePlus, TangoBlackPlus, and Grey60) by using the heat flow meter method. The resulting thermal conductivities are then applied in finite element analysis (FEA) simulations to model the thermal distribution of heated PolyJet …
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Design and Fabrication of a Mask Projection Microstereolithography System for the Characterization and Processing of Novel Photopolymer Resins
… process, and quantify the performance of novel photopolymers. MPμSL is an Additive Manufacturing process that uses DLP technology to digitally pattern UV light and selectively cure entire layers of photopolymer resin and fabricate a three dimensional part. For the MPμSL system designed in this …
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The Effects of Quantum Dot Nanoparticles on Polyjet Direct 3D Printing Process
… of Additive Manufacturing of nanomaterials in photopolymers. Overall, this work embodies the first investigations of the effects of QDs on rheological characteristics of ink-jetted media, the effects of QDs on curing of AM photopolymer media, visibility of nanoparticles within printed AM media, …
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Fracture and Friction Characterization of Polymer Interfaces
… and interface between two printed acrylic-based photopolymers. Significant differences in fracture energy and loci of failure between the selected test configurations were observed depending on the print orientation. Failures were nominally seen to occur at the interface, alternating from one …
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Characterization of polygrama green photopolymer for Compact Optoelectronic Integrated Neural (COIN) coprocessor applications
… Neural (COIN) co processor [13]. The choice of photopolymers is critical in determining the performance of COIN processors as we look at ways to increase the diffraction efficiency. The focus of this research was to optically characterize Polygrama Green, a photopolymer that is sensitive to …
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Towards material-informed tectonics
… implicit modeling for the fabrication of photopolymers, trajectory optimizing for the fabrication of water-based material, and toolpath planning for the fabrication of fiber-based material. Titled Material-informed Tectonics, the framework extends the domain of parametric design processes …
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Proximity Field Nanopatterning, Its Optics and Applications
… in need. Conformable phase masks and transparent photopolymers provide the basis for a simple optical technique that can form complex, but well defined 3D nanostructures in a single exposure step with incomparable depths of focus. This dissertation describes the method and presents a range of …
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Hybridization of PolyJet and Direct Write for the Direct Manufacture of Functional Electronics in Additively Manufactured Components
… materials, including rigid and elastomeric photopolymers, which enables the design of flexible features such as membranes and joints. In this work, extrusion-based DW is integrated with PolyJet AM technology to explore opportunities for embedding conductive materials on rigid and elastomeric …
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Fabrication of Hybrid Atomic Force Microscopy Probe for Enhancing Sensitivity of AFM-Infrared Nanoscale Spectroscopy
… AFM probe. Since thermal conductivity of photopolymers are orders of magnitude lower than silicon, this alternative seems to be promising. To address this issue, I am developing a MEMS fabrication method enabling us to make a hybrid AFM probe (silicon cantilever with photopolymeric tip). …
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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
… for other AM technologies capable of processing photopolymers and (3) the promise of processing a wide range of inks, which enables the fabrication of metal, ceramic, polymer, bio-based, and multi-material parts. Currently, the technology faces a few shortcomings including (1) limited material …
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Design and Application of Waveguide Holographic Optical Elements
… as studying the diffusion process in holographic photopolymers. The DDEM system was used to optimize the recording of five multiplexed out-coupling HOEs and resulted in a component with uniform consistent diffraction efficiency for five holograms. This would have been difficult or impossible to do …
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Advancing Elastomers to Additive Manufacturing Through Tailored Photochemistry and Latex Design
… the first example of hydrocarbon elastomer photopolymers for VP. 1,6-hexanedithiol provided a miscible dithiol chain extender which introduced linear thiol-ene chain extension to compete with acrylate crosslinking. DMA and tensile confirmed a decrease in T<sub>g</sub> and increased …
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Enabling Soft Mechanosensing via Vat Photopolymerization 3D Printing: Materials, Design and Integration
L'abstract è presente nell'allegato / the abstract is in the attachment
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Análisis del aprovechamiento de fotopolímeros residuales en Flexospring por degradación enzimática
El presente trabajo de grado investiga el aprovechamiento de residuos de fotopolímeros de la empresa Flexospring a través de la degradación enzimática. Ante la generación anual de aproximadamente 11,5 toneladas de estos materiales, los elevados costos y baja sostenibilidad de su disposición …