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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 20 of 30 for “"Polymer material"”.
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Surface Relief Grating on Thin Film Containing Azobenzene-Polymer Material Linked by Hydrogen-Bonding
Thin films of azobenzene-polymer material show unique photo-responsive behavior under irradiation with two interfering laser beams. That leads to generate surface inscription pattering known as Surface Relief Grating (SRG). Moreover, two different types of polymers were used in this research, and …
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Polymer material selection and testing of resistive wire arrangement for a transparent infant warming blanket
… of wires, located between two sheets of a clear polymer and is designed to reach 37°C and provide 50W heat generation with a 12V power supply and a 3[omega] effective resistance of the wire network. The alpha prototype of ThermoCloud is composed of thin nichrome wires arranged in parallel and …
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Guided Wave Actuation for Enhanced Damage Identification in Carbon Fiber Reinforced Polymer Material Using Electrical Resistance Tomography
<p>Carbon fiber reinforced polymer composites (CFRP) are prone to delamination damage which leads to the reduction in the mechanical performance of aerospace structures. Electrical Resistance Tomography (ERT) is a non-destructive evaluation technique that uses surface voltage measurements with …
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Characterisation of Polymer-based Wood-substitute for Sustainable Building and Construction
Materials have always been used for the commodities and convenience of mankind. However, the recognition of the impacts of the global demand for materials and resources has been leading to a growing concern with regards to production and consumption patterns, resources scarcity and waste …
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SURFACE AREA AS A METHOD FOR THE DETERMINATION OF GLOVE DEGRADATION
… as reduce the risk of exposure to infectious material. Chemical resistant gloves are made from a variety of polymer materials such as plastic, rubber, and synthetic rubber, as not one material provides protection against all chemicals. One type of polymer material may adequately protect …
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Quality improvement of recycled concrete aggregate using polymers
… is one of the main resources for sustainable material. As this material should not be wasted, this research aims to assess the reuse of crushed concrete material as a resource of sustainable construction material. In this thesis, two types of polymer were mixed with crushed concrete to improve …
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Synthetic Strategies Towards Pi-Extended Dithienophospholes Available for Click Chemistry
… the phosphole was done. Finally, the emissive materials were able to be clicked onto benzyl azide as a proof-of-concept for an organic light-emitting polymer material for the potential application of solid-state lighting.
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Enhancing the Capabilities of Large-Format Additive Manufacturing Through Robotic Deposition and Novel Processes
… is to enhance the capabilities of large-format, polymer material extrusion, additive manufacturing (AM) systems. Specifically, the aims of this research are to (1) Construct, and develop a robust workflow for, a large-format, robotic, AM system; (2) Develop an algorithm for determining and …
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Anionic Amino-Cope Rearrangement Studies and Development of Designer Sulfur-Rich Materials using Sulfur, Sulfur Monochloride and Dithiophosphoric Acids
… and characterizations of new sulfur-rich materials. Chapter 1 presents diverse results of the anionic amino-Cope cascades when strategically employing γ-substituted dienolates nucleophile. In Chapter 2, efforts to challenge anionic amino-Cope reactions with steric effect are reported, …
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Material evaluation and selection processes to enable design for manufacture
… is necessary to quickly evaluate many candidate materials in terms of performance and processing costs. Evaluation using physical prototypes yields concrete results but is time intensive and costly when dealing with multiple optimization objectives. As an alternative, computer aided simulation is …
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Simulation of polymer solar cell characteristics by amps-1d
Simulation of polymer solar cell characteristics is presented in this study. The solar cells are made of materials such as the following: Poly (3-hexylthiophene): [6, 6]-phenyl C61- butyric acid methylester (P3HT: PCBM) and poly[2,1,3-benzothiadiazole-4,7-diyl[4,4- …
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A study of heat transfer and process control in the rotational moulding of polymer powders
… between biaxial motion, powder properties, mould materials and forced convective heating could be obtained. Temperature measurements were made during moulding trials using an insulated datalogging device to verify the findings of the computer simulation.<br/><br/>These measurements were found to …
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Linking Thermophysical Transitions and Rheological Properties to Polymer Foaming Outcomes with Carbon Dioxide
… fluids as physical blowing agents for polymer foaming is driving a renewed need for the fundamental understanding of polymer thermophysical and rheological properties in the presence of dense fluids. In particular, carbon dioxide is often studied as a physical blowing agent because of …
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Process control for micro embossing : initial variability study
… bigger features involve a larger volume of polymer material to form the shape and as the material
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The Minus Approach to Redefine the Standard of Practice of Drinking Water Treatment: Philosophy and Case Studies on the Adsorption of Per- and Polyfluoroalkyl Substances onto Powder Activated Carbon and Membrane Surfaces
… Inadvertent PFAS adsorption onto membrane materials can result in concentration underestimations. Herein, we report on the adsorption of six different PFAS onto eleven syringe filters, differing in either manufacturer, polymer material, diameter, and/or pore size under various experimental …
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Modelling multivalent interactons
… which could represent a protein, nanoparticle, polymer, virus or a lipid bilayer, has the ability to form multiple bonds to a substrate. Hence, a multivalent interaction can be strong, even if the individual bonds are weak. However, much more interestingly, multivalency enables the design of …
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The preparation of a polyurethane elastomer and evaluation of the mechanical properties
… test and hardness test. Three groups of polymer material were prepared. In the first group the R value was varied from 1.0 to 4.5, (the ratio of 33’ Bitolyene 44’ diisocyanate to polyester) and fixed amounts of excess diisocyanate were used. Ethylene glycol was used as the cross-linking …
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Compressive Instabilities in Metal-coated Polymer Microtrusses
… of lightweight structures are metal-coated polymers. Hybrid polymer-nanometal microtrusses are a member of this family. These structures are fabricated by 3D printing complex truss-like structures out of polymer material, and electrodepositing nanocrystalline metal onto the polymer. Recent …
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Polyvinyl alcohol size recovery and reuse via vacuum flash evaporation
… incentives exist to recover the synthetic polymer material from the desize wash water stream and reuse it. A new technology that would eliminate the disadvantages of the current Reverse Osmosis Ultrafiltration (UF) PVA recovery process is Vacuum Flash Evaporation (VFE). This research adapts …
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Capillary Effects of Nanoporous Networks on Aerospace Autoclave-grade Prepreg Composites Enabling Vacuum-bag-only Manufacturing
The use of carbon fiber reinforced polymer (CFRP) composite systems has grown in the aerospace industry due to their high mass-specific stiffness and strength and other properties. Yet, many advanced aerospace-grade CFRPs require autoclave pressure vessels to thermally process composites, which has …
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