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Joseph, Sibichen. "Phase segregation in multi-component polymer systems". Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape8/PQDD_0006/NQ41182.pdf.
Pełny tekst źródłaTeixeira, Roberto F. A. "Multi-layered nanocomposite polymer latexes and films". Thesis, University of Warwick, 2011. http://wrap.warwick.ac.uk/45871/.
Pełny tekst źródłaChen, Tzu-Fan. "Multi-Walled Carbon Nanotubes-Modified Polymer Organic Photovoltaics". TopSCHOLAR®, 2009. http://digitalcommons.wku.edu/theses/81.
Pełny tekst źródłaIvankovic, Alojz. "Rapid crack propagation in polymer multi-layer systems". Thesis, Imperial College London, 1991. http://hdl.handle.net/10044/1/46837.
Pełny tekst źródłaVillechevrolle, Viviane Louise. "Polymer blends for multi-extruded wood-thermoplastic composites". Pullman, Wash. : Washington State University, 2008. http://www.dissertations.wsu.edu/Thesis/Fall2008/v_villechevrolle_121008.pdf.
Pełny tekst źródłaTitle from PDF title page (viewed on Mar. 2, 2009). "Department of Civil and Environmental Engineering." Includes bibliographical references.
Kaneko, Wakako. "Studies on multi-functionalization of coordination polymer magnets". 京都大学 (Kyoto University), 2008. http://hdl.handle.net/2433/136283.
Pełny tekst źródłaAsmaoglu, Serdar. "Synthesis And Charaterization Of Multi-hollow Opaque Polymer Pigmets". Master's thesis, METU, 2012. http://etd.lib.metu.edu.tr/upload/12614539/index.pdf.
Pełny tekst źródłaWater-in-Oil-in-Water&rdquo
(W/O/W) emulsion system. Oil phase was methyl methacrylate and ethylene glycol dimethacrylate monomer mixture at 1:1 weight ratio. The dimension and distribution of hollows inside polymer particles are dependent on the size of water droplets which are encapsulated in micelles. For Water-in-Oil (W/O) assembly, a hydrophobic surfactant and hydrophilic co-surfactant (Span 80-Tween 80) combination with a hydrophilic/lipophilic balance (HLB) value between 5-8 was used. The effects of surfactant and co-surfactant composition on the stability of the W/O emulsion and also on the size of water droplets were studied. In addition, the effect of the ultrasonication on the average size of water droplets was investigated. The hollow size distribution which may possibly give the maximum scattering efficiency was predicted by a mathematical model based on the Mie scattering. The optimum size distribution for W/O emulsion was obtained at the monomer/surfactant/water ratio of 75.5/9.4/15.1 after ultrasonication for 30 seconds at 80 W power. The W/O/W emulsion was prepared by dispersing the W/O emulsion in aqueous solution of hydrophilic Triton X-405. The influence of surfactant concentration and mechanical mixing on monomer droplets was investigated by size measurement and optical microscopy. After stabilizing with 1 %w/w polyvinylpyrrolidone (PVP) solution, the W/O/W emulsion was polymerized at 55 °
C for 20 h. The surface morphology of synthesized polymer pigments was analyzed by scanning electron microscopy (SEM) and the inner hollow structure was confirmed by transmission electron microscopy (TEM). The analysis indicated that multihollow opaque polymer pigments were successfully synthesized. The opacity, the L*a*b* color, and the gloss properties of polymer pigments were examined by spectrophotometer and glossmeter. The opacity values were assessed by contrast ratio measurements, and the synthesized polymer pigments provided up to 97.3 % opacity (50 %v/v solid content). In addition, the pigments exhibited low gloss values, and yielded matt films.
Figueroa, Leonardo E. "Deterministic simulation of multi-beaded models of dilute polymer solutions". Thesis, University of Oxford, 2011. http://ora.ox.ac.uk/objects/uuid:4c3414ba-415a-4109-8e98-6c4fa24f9cdc.
Pełny tekst źródłaCresswell, Philip Thomas. "Multi-component stimuli-responsive polymer brushes grafted from flat surfaces". Thesis, University of Bristol, 2013. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.633147.
Pełny tekst źródłaXiao, Xiaoguang. "Multi-Scale Modeling and Simulation of Nanoparticles Reinforced Polymer Composites". Thesis, University of Louisiana at Lafayette, 2019. http://pqdtopen.proquest.com/#viewpdf?dispub=10812557.
Pełny tekst źródłaOver the years, the properties of nanoparticle-reinforced composites have been investigated regarding how the overall mechanical properties of the composites can be influenced by weight percentages, particle size, and types of reinforcement. The current advanced material processing technology allows people to obtain customized materials. However, making composite materials is usually costly and time-demanding, and some composite waste does not easily degrade. This computational study on composites provides a promising solution to these problems. In this research, a methodology of studying nanoparticle-reinforced polymer composites is developed, which allows the simulation of mechanical properties with multiscale computational approach. First, an RVE model of general nanoparticle-reinforced composites is constructed at nanoscale, and a computational study is made to examine the tensile behavior of the RVE on LS-DYNA. Second, a sensitivity study is conducted to optimize the mesh size with regards to simulation accuracy and computational time. Also, the model is validated by comparing the results from simulation with published data. Third, RVE models are applied to develop multiple models at microscale featured with various nanoparticles reinforcement dosages and orientation. In the end, data from tensile experiments on VGCNF are utilized to verify the models. It is found that using RVE models shortened the simulation times significantly while maintaining relatively high accuracy. Also, those models can be extensively applied to simulate various nanocomposites at multiple scales, which will fill the gap of simulation at between nanoscale and microscale.
Silberstein, Meredith N. "Mechanics and multi-physics deformation behavior of polymer electrolyte membranes". Thesis, Massachusetts Institute of Technology, 2011. http://hdl.handle.net/1721.1/67597.
Pełny tekst źródłaCataloged from PDF version of thesis.
Includes bibliographical references (p. 176-184).
Fuel cells are a developing technology within the energy sector that offer both efficiency and environmental advantages over traditional combustion processes. In particular, proton exchange membrane fuel cells (PEMFC) are promising for transportation and portable devices due to their low operating temperature, reduced C02 emissions, and scalability. A central component is the polymer electrolyte membrane (PEM) which conducts protons from the fuel source (typically either hydrogen or methanol) at the anode to the cathode where it reacts with oxygen while preventing the transport of either electrons or the fuel itself. Historically membranes have been designed primarily in terms of maximizing proton conductivity, but it is also important that they prevent fuel crossover and have minimal chemical and mechanical degradation over the target lifetime of the fuel cell. Membrane mechanical integrity is thus a critical concern for commercial distribution of PEMFC technology. This thesis has two primary focus areas: (1) characterization and modeling of Nafion, the benchmark PEM, in order to understand hygro-thermal loading in the existing technology and (2) mechanical characterization and modeling toward the development of an alternative polymer electrolyte membrane. These two areas are linked by the common technological application of low temperature fuel cells and can also be placed more broadly in the field of microstructurally and micromechanically informed constitutive modeling. The presulfonated polytetrafluoroethylene membrane Nafion is perhaps the most commercially prominent and widely studied polymer electrolyte membrane (PEM). Here Nafion is experimentally characterized first under monotonic and cyclic uniaxial tensile loading as a function of rate, temperature, and hydration. The data is used to develop a microstructurally motivated three-dimensional constitutive model. The Nafion model is validated under uniaxial tension for monotonic, cyclic, stress relaxation, and creep loading at various environmental conditions. Small and wide angle x-ray scattering characterization is then performed during uniaxial tensile testing in order to assign a microstructural interpretation to the mechanical behavior. The model is then validated for loading conditions which are expected to occur in the fuel cell, specifically, biaxial tension in the membrane plane and constrained swelling. Biaxial characterization is conducted via in-plane tensile testing of cruciform shaped specimens. The biaxial response is found to be qualitatively similar to the uniaxial response with the stiffness and strength in a given direction dependent on the degree of biaxiality. The constitutive model was shown to well predict this complex multiaxial deformation response when the model is implemented in the experimental geometry and reduced by the same methods as the experimental results. Biniaterial strip swelling of Nafion and typical gas diffusion layer material (GDL) is used to probe the partially constrained swelling behavior of Nafion. When the strip is hydrated the membrane swells causing the strip to curl with the membrane on the convex side until the force from the membrane is balanced by a moment in the GDL. Upon drying, plastic deformation that occurred during hydration induces a residual curvature of the opposite convexity. The hydrated and dried radii are found to agree with the finite element simulation predictions for two thicknesses of Nafion to within experimental error. Finally, the Nafion constitutive model is used to simulate a simplified fuel cell cycle. A negative hydrostatic pressure develops in the membrane upon drying, suggesting a driving force for cavitation or crazing. A study of the effect of ramp rate and hold time reveal a significant time dependence of the pressure, which is not surprising given the significant rate dependence observed for Nafion under uniaxial mechanical loading. Simulations of this nature are useful in guiding startup and shutdown procedures for fuel cells, for designing/validating potential procedures for accelerated lifetime testing, and for designing alternative fuel cell geometries. Focus is then shifted to the design of new polymer electrolyte membranes for direct methanol fuel cells (DMFC) which are a special case of PEMFC. DMFC operate under the same principal as PEMFC., however the fuel is liquid methanol rather than hydrogen. The high energy density of methanol makes DMFC particularly promising for portable applications where they could replace Li-ion batteries. In contrast to PEMFC, fuel crossover is a major design concern even when the membrane is fully intact. Given the multi-functionality of a DMFC PEM, it is natural to look to a composite solution. For the proton transport and fuel crossover resistance we use a chemistry and synthesis technique developed in the Hammond lab at MIT. This membrane is itself a composite of sulfonated Poly(2,6-dimethyl 1,4-phenylene oxide) (sPPO) and poly(diallyl dimethyl ammonium chloride) (PDAC) assembled via layer-by-layer (LBL) deposition. Unfortunately these films tear easily under dry conditions and are almost fluid like under hydrated conditions. The PDAC/sPPO membrane must therefore be combined with a mechanical support component. Here we use a highly porous and mechanically robust mat produced by electrospinning polyamide (EFM). In this thesis, focus is on the mechanical aspects of the design. A model for the mechanical behavior of the composite is developed based on experiments and models of the component materials. Uniaxial tensile tests are conducted on each of the materials (LBL, EFM, and LBL coated EFM) and the material morphology is examined via scanning electron microscopy where appropriate (EFM and LBL coated EFM). A micromechanically motivated constitutive model is then developed separately for the LBL and the EFM. The LBL model is a single mechanism elastic-plastic model that is highly hydration sensitive. The EFM structure is idealized as a layered triangulated network of elastic-plastic fibers. The behavior of the constituent fibers is taken to be elastic-plastic accounting for stretching and bending of the fibers when subjected to end tensile and compressive loads; the bending of the fibers when a fiber is locally under compression is found to be the key mechanism enabling the mat to consolidate during tensile loading. The layers of triangles impose mutual kinematic constraints emulating the layered structure of real mats, providing greater isotropy to the yield and post-yield behavior. A composite model is then developed as the superposition of the two materials. It is found that a composite model consisting of a weighted summation of the two component behaviors can capture the dry behavior. but not the hydrated behavior. In the hydrated state, the LBL, which is itself quite compliant under uniaxial loading, is found to inhibit fiber bending, thereby lending initial elastic stiffness and reducing post-yield hardening in a non-additive manner.
by Meredith Natania Silberstein.
Ph.D.
Feickert, Aaron James. "Multi-Scale Simulation Methods of Crosslinked Polymer Networks and Degradation". Diss., North Dakota State University, 2018. https://hdl.handle.net/10365/28764.
Pełny tekst źródłaSato, Takeshi. "Transport Phenomena of Entangled Polymer Melts:A Multi-Scale Simulation Study". Kyoto University, 2020. http://hdl.handle.net/2433/253310.
Pełny tekst źródłaLeamen, Michael. "Kinetic Investigation and Modelling of Multi-Component Polymer Systems with Depropagation". Thesis, University of Waterloo, 2005. http://hdl.handle.net/10012/885.
Pełny tekst źródłaKim, Yong-Jun. "Application of polymer/metal multi-layer processing techniques to microelectromechanical systems". Diss., Georgia Institute of Technology, 1997. http://hdl.handle.net/1853/14987.
Pełny tekst źródłaStenzler, Joshua Saul. "Impact Mechanics of PMMA/PC Multi-Laminates with Soft Polymer Interlayers". Thesis, Virginia Tech, 2009. http://hdl.handle.net/10919/36131.
Pełny tekst źródłaMaster of Science
Zhou, Tianhong. "Multi-compartment biodegradable polymer implants for intravitreal management of proliferative vitreoretinopathy /". The Ohio State University, 1998. http://rave.ohiolink.edu/etdc/view?acc_num=osu1488186329502253.
Pełny tekst źródłaMao, Jialin. "CHARACTERIZATION OF POLYMER ARCHITECTURES AND SEQUENCES BY MULTI-STAGE MASS SPECTROMETRY". University of Akron / OhioLINK, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=akron1554913939030297.
Pełny tekst źródłaBavisi, Amit. "Integrated multi-mode oscillators and filters for multi-band radios using liquid crystalline polymer based packaging technoloy". Diss., Available online, Georgia Institute of Technology, 2006, 2006. http://etd.gatech.edu/theses/available/etd-04062006-131113/.
Pełny tekst źródłaSwaminathan, Madhavan, Committee Chair ; Cressler, John D., Committee Co-Chair ; Kenney, Stevenson J., Committee Member ; Peterson, Andrew, Committee Member ; Durgin, Gregory, Committee Member ; Sitaraman, Suresh, Committee Member.
Chinnam, Parameswara Rao. "MULTI-IONIC LITHIUM SALTS FOR USE IN SOLID POLYMER ELECTROLYTES FOR LITHIUM BATTERIES". Diss., Temple University Libraries, 2015. http://cdm16002.contentdm.oclc.org/cdm/ref/collection/p245801coll10/id/311780.
Pełny tekst źródłaPh.D.
Commercial lithium ion batteries use liquid electrolytes because of their high ionic conductivity (>10-3 S/cm) over a broad range of temperatures, high dielectric constant, and good electrochemical stability with the electrodes (mainly the cathode cathode). The disadvantages of their use in lithium ion batteries are that they react violently with lithium metal, have special packing needs, and have low lithium ion transference numbers (tLi+ = 0.2-0.3). These limitations prevent them from being used in high energy and power applications such as in hybrid electric vehicles (HEVs), plug in electric vehicles (EVs) and energy storage on the grid. Solid polymer electrolytes (SPEs) will be good choice for replacing liquid electrolytes in lithium/lithium ion batteries because of their increased safety and ease of processability. However, SPEs suffer from RT low ionic conductivity and transference numbers. There have been many approaches to increase the ionic conductivity in solid polymer electrolytes. These have focused on decreasing the crystallinity in the most studied polymer electrolyte, polyethylene oxide (PEO), on finding methods to promote directed ion transport, and on the development of single ion conductors, where the anions are immobile and only the Li+ ions migrate (i.e. tLi+ = 1). But these attempts have not yet achieved the goal of replacing liquid electrolytes with solid polymer electrolytes in lithium ion batteries. In order to increase ionic conductivity and lithium ion transference numbers in solid polymer electrolytes, I have focused on the development of multi-ionic lithium salts. These salts have very large anions, and thus are expected to have low tanion- and high tLi+ transference numbers. In order to make the anions dissociative, structures similar to those formed for mono-ionic salts, e.g. LiBF4 and lithium imides have been synthesized. Some of the multi-ionic salts have Janus-like structures and therefore can self-assemble in polar media. Further, it is possible that these salts may not form non-conductive ion pairs and less conductive ion triplets. First, we have prepared nanocomposite electrolytes from mixtures of two polyoctahedral silsesquioxanes (POSS) nanomaterials, each with a SiO1.5 core and eight side groups. POSS-PEG8 has eight polyethylene glycol side chains that have low glass transition (Tg) and melt (Tm) temperatures and POSS-phenyl7(BF3Li)3 is a Janus-like POSS with hydrophobic phenyl groups and -Si-O-BF3Li ionic groups clustered on one side of the SiO1.5 cube. The electron-withdrawing POSS cage and BF3 groups enable easy dissociation of the Li+. In the presence of polar POSS-PEG8, the hydrophobic phenyl rings of POSS-phenyl7(BF3Li)3 aggregate and crystallize, forming a biphasic morphology, in which the phenyl rings form the structural phase and the POSS-PEG8 forms the conductive phase. The -Si-O-BF3- Li+ groups of POSS-phenyl7(BF3Li)3 are oriented towards the polar POSS-PEG8 phase and dissociate so that the Li+ cations are solvated by the POSS-PEG8. The nonvolatile nanocomposite electrolytes are viscous liquids that do not flow under their own weight. POSS-PEG8/POSS-phenyl7(BF3Li)3 at O/Li = 16/1 has a conductivity, σ = 2.5 x 10-4 S/cm at 30°C, 17 x greater than POSS-PEG8/LiBF4, and a low activation energy (Ea ~ 3-4 kJ/mol); σ = 1.6 x 10-3 S/cm at 90°C and 1.5 x 10-5 S/cm at 10°C. The lithium ion transference number was tLi+ = 0.50 ± 0.01, due to reduced mobility of the large, bulky anion and the system exhibited low interfacial resistance that stabilized after 3 days (both at 80°C). Secondly, solid polymer electrolytes have been prepared from the same salt, POSS-phenyl7(BF3Li)3 and polyethylene oxide (PEO). These exhibit high ambient temperature conductivity, 4 x 10-4 S/cm, and transference number, tLi+ = 0.6. A two-phase morphology is proposed in which the hydrophobic phenyl groups cluster and crystallize, and the three -BF3- form an anionic pocket, with the Li+ ions solvated by the PEO phase. The high ionic conductivity results from interfacial migration of Li+ ions loosely bonded to three -BF3- anions and the ether oxygens of PEO. Physical crosslinks formed between PEO/Li+ chains and the POSS clusters account for the solid structure of the amorphous PEO matrix. The solid polymer electrolyte has an electrochemical stability window of 4.6 V and excellent interfacial stability with lithium metal. In order to further enhance the ionic conductivity of solid polymer electrolytes, we have made two improvements. First, we have used so called half cube structures, T4-POSS, that contain 4 phenyl groups on one side of a Si-O- ring, and 4 ionic groups on the other side, and so are true Janus structures. They contain a 4/4 ratio of phenyl/ionic groups, unlike the previous structures that contain 7 phenyl groups/3 ionic groups. At the same O/Li ratio, the ionic conductivity of [PhOSi(OLi)]4 with POSS-PEG8 is higher than POSS-phenyl7Li3 because of more Li+ dissociation in the former case. Second, we have increased the dissociation of the lithium salts by replacing the Si-O-BF3Li groups with Si-(C3H4NLiSO2CF3)4. Both T4-POSS-(C3H4NLiSO2CF3)4 and POSS-(C3H4NLiSO2CF3)8 have been synthesized and characterized, with some preliminary conductivity data obtained.
Temple University--Theses
Jain, Ayush. "Development and Characterization of Multi-scale Polymer Composite Materials for Tribological Applications". Thesis, Luleå tekniska universitet, Maskinelement, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-65241.
Pełny tekst źródłaSong, Mo. "Applications of modulated-temperature differential scanning calorimetry to multi-component polymer materials". Thesis, Lancaster University, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.337256.
Pełny tekst źródłaLidgett, Mark Jonathan. "Multi-scale modelling of polymer composite materials at high rates of strain". Thesis, University of Nottingham, 2012. http://eprints.nottingham.ac.uk/30888/.
Pełny tekst źródłaChristke, Sandra. "Multi-layer polymer-metal laminate as fire protection for lightweight transport structures". Thesis, University of Newcastle upon Tyne, 2016. http://hdl.handle.net/10443/3348.
Pełny tekst źródłaÇakir, Pinar. "Molecularly imprinted polymer nanostructures by controlled / living radical polymerization with multi-iniferters". Compiègne, 2012. http://www.theses.fr/2012COMP2018.
Pełny tekst źródłaMolecularly imprinted polymers (MIPs) are synthetic materials with specific recognition properties for target molecules. They are considered an alternative to antibodies and are characterized by a higher chemical and physical stability, better availability and lower cost. Historically, MIPs were synthesized as bulk monoliths that were subsequently broken down mechanically in order to form particles of a size in the micrometer range, with irregular shapes. During the last decade, research has focused on the direct synthesis of spherical MIP micro and nanoparticles, and, more recently, on protein-sized, quasi-soluble MIP nanogels in order to widen the application range of MIPs in the biological field. The main difficulty of synthesizing MIPs with diameters in the low nm region is the low density of the resulting polymer network consisting only of a few polymer chains, which makes it difficult to imprint and maintain a molecular memory. In this thesis, we propose an original approach to the synthesis of quasisoluble MIP nanogels with a size in the low nm range, close to that of real antibodies. The proposed procedure involves a new type of initiator for controlled/living radical polymerization, based on multiple iniferter moieties attached to a dendritic core. This allows for the generation of a higher local radical density, and thus for the synthesis of denser nanogels. By using this strategy, MIP Nanogels of 17 nm size with an appreciable molecular imprinting effect, a good affinity for the target molecule, the chiral drug propranolol, and a good selectivity were obtained. In addition, these multiiniferters were also used for the bottom-up synthesis of thin MIP patterns on silicon wafers, by surface-initiated polymerization. The multi-iniferter was printed on to the surface by soft lithography and chemically attached through its carboxyl-functionalized core, followed by the in-situ synthesis of the MIP. Well defined MIP patterns were obtained, which were characterized by optical emission spectroscopy, Raman spectroscopy, atomic force microscopy, and the specific binding of the target molecule was visualized by fluorescence microscopy. We believe that the synthesis, in solution and at surfaces, of protein-size MIP nanogels with specific recognition properties will provide new opportunities for biosensors and biochips technologies in biomedical applications
Njuguna, Michael Kamau. "Characterisation of multi wall carbon nanotube–polymer composites for strain sensing applications". Thesis, Queensland University of Technology, 2012. https://eprints.qut.edu.au/54671/1/Michael_Kamau_Njuguna_Thesis.pdf.
Pełny tekst źródłaKhan, Ikram Ullah. "Microfluidic-assisted synthesis and release properties of multi-domain polymer microparticles drug carriers". Thesis, Strasbourg, 2014. http://www.theses.fr/2014STRAF042/document.
Pełny tekst źródłaCharacteristics and release properties of drug loaded microparticles depend upon material used and choice of production method. Conversely to most of the conventional ones, microfluidic methods give an edge by improving the control over droplet generation, size and size distribution. Capillary-based microfluidic devices were successfully used to obtain monodisperse drug(s) loaded microbeads, janus, core-shell and trojan particles using UV initiated free radical polymerization while keeping activity of active loaded molecules. These devices can be assembled in a short period of time and a slight change in design gives completely different microparticles morphologies. These particles were developed with the aim to address different issues experienced in oral drug delivery. For instance microbeads can be used to deliver NASIDs in a sustained release manner while janus particles can release two APIs with completely different properties (solubility, compatibility) also in a sustained release manner. Core-shell particles were designed to target colonic region of human intestine for dual drug delivery. Trojan particles were synthesized in a new semi-continuous microfluidic process, thus improving nanoparticles safety handling and release in simulated gastric fluid. Each system was fully characterized to insure batch to batch consistency and reproducibility. In general, the release of active ingredients was controlled by tuning the operating and material parameters like phases flow rates, nature and concentration of drug, (co)monomers, surfactant and crosslinker, pH of release media with the result of different particle morphologies, sizes and shapes or matrix crosslinking density
Perdikoulias, John. "Analysis and design of annular dies for mono- and multi-layer polymer flows". Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/nq21380.pdf.
Pełny tekst źródłaPeng, Tao. "Permeability of responsive polymer-grafted porous membranes, temperature, pH and multi-stimuli response". Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape4/PQDD_0020/NQ49832.pdf.
Pełny tekst źródłaWillemann, Michael Howard. "Polymer-Supported Bridges for Multi-Finger AlGaN/GaN Heterojunction Field Effect Transistors (HFETs)". Thesis, Virginia Tech, 2007. http://hdl.handle.net/10919/34801.
Pełny tekst źródłaMaster of Science
Greenhalgh, Kerriann R. "Development of biocompatible multi-drug conjugated nanoparticles/smart polymer films for biomedicinal applications". [Tampa, Fla.] : University of South Florida, 2007. http://purl.fcla.edu/usf/dc/et/SFE0002318.
Pełny tekst źródłaRasmussen, Sarah Grace. "Synthesis and Characterization of Ferromagnetic Polymer-Coated Cobalt Nanoparticles in Multi-Gram Quantities". Thesis, The University of Arizona, 2009. http://hdl.handle.net/10150/193433.
Pełny tekst źródłaAl-Harbi, Nasser Munawir D. "Characterisation of complex polymer mixtures". Thesis, University of Manchester, 2011. https://www.research.manchester.ac.uk/portal/en/theses/characterisation-of-complex-polymer-mixtures(be0269fe-2ac3-4128-ba57-4a03dbf46a7e).html.
Pełny tekst źródłaRodriguez, John Israel 1972. "A multi-frequency induction heating system for a thermally triggered gel polymer dynamic vibration absorber". Thesis, Massachusetts Institute of Technology, 2003. http://hdl.handle.net/1721.1/87905.
Pełny tekst źródłaIncludes bibliographical references (p. 277-280).
Since its invention in the early part of the twentieth century, the dynamic vibration absorber (DVA) has played an important role in vibration suppression. In its simplest form, a dynamic vibration absorber is a mechanical network consisting of a spring, a mass and sometimes a damping element. These networks have been used to successfully reduce vibrations in buildings, bridges and imbalances in rotating machinery. Because these absorbers are most effective at attenuating disturbance near or at their self-resonant frequency, there is on-going research to develop semi-active DVA's capable of adjusting their natural frequency in real time. A new semi-active DVA is described that can modify its moment of inertia, and therefore its natural frequency, by using a collection of thermo-responsive gel polymers. This thesis develops an induction heating system that is suitable for noncontact heating of these gel polymers. The proposed heating system addresses the more general problem of controllable power delivery to multiple induction targets driven by a single induction coil. The focus of this work divides neatly between the design of the induction heating targets and the necessary power electronics. Targets that have preferential heating characteristics at particular frequencies are developed and analyzed. These targets include both resonant RLC circuits as well as conductors whose critical dimensions are much smaller than their associated skin depth. Extensive modeling of these targets is carried out and experimental results are presented. The ability to "selectively" heat these induction targets requires a power supply that can generate a sinewave with enough purity to not excessively heat unwanted targets.
(cont.) A 1 kW multilevel inverter topology is presented as an excellent compromise between total harmonic distortion and efficiency for this application. Referred to as the Marx inverter, this circuit can maintain its multilevel nature during real power transfer without the need for an external voltage balancing circuit or complicated control- unlike more traditional multilevel topologies. In addition to the gel vibration damper, portions of this work stand to benefit both medical and industrial venues where a desired temperature profile must be generated in a noncontact manner.
by John Israel Rodriguez.
Ph.D.
An, Dechang. "Electro-optic polymer-based monolithic waveguide devices with multi-functions of amplification switching and modulation". Access restricted to users with UT Austin EID Full text (PDF) from UMI/Dissertation Abstracts International, 2001. http://wwwlib.umi.com/cr/utexas/fullcit?p3035933.
Pełny tekst źródłaSanti, Vasile Nicolò. "3D multi-physics modelling and validation of the model of a Polymer Electrolyte Membrane Fuel". Doctoral thesis, Politecnico di Torino, 2017. http://hdl.handle.net/11583/2690105.
Pełny tekst źródłaCattell, Melina Kay. "Static and fatigue flexural testing of polymer matrix glass fibre composites using a multi station fixture". Thesis, University of Wolverhampton, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.395193.
Pełny tekst źródłaHölzer, Stefan Verfasser], Ulrich Sigmar [Akademischer Betreuer] [Schubert i Mario [Akademischer Betreuer] Beiner. "Structure-property relationships of polymer-based multi-phase systems / Stefan Hölzer. Gutachter: Ulrich Sigmar Schubert ; Mario Beiner". Jena : Thüringer Universitäts- und Landesbibliothek Jena, 2015. http://d-nb.info/1072621878/34.
Pełny tekst źródłaHölzer, Stefan [Verfasser], Ulrich Sigmar [Akademischer Betreuer] Schubert i Mario [Akademischer Betreuer] Beiner. "Structure-property relationships of polymer-based multi-phase systems / Stefan Hölzer. Gutachter: Ulrich Sigmar Schubert ; Mario Beiner". Jena : Thüringer Universitäts- und Landesbibliothek Jena, 2015. http://d-nb.info/1072621878/34.
Pełny tekst źródłaPark, Soo Jeoung. "Photopolymerization-Induced Crystallization in Relation to Solid-Liquid Phase Diagrams of Blends of Blends of Poly(ethylene oxide)/Multi-functional Acrylate Monomers". University of Akron / OhioLINK, 2008. http://rave.ohiolink.edu/etdc/view?acc_num=akron1218131827.
Pełny tekst źródłaKienitz, Brian L. "The Effects of Cationic Contamination on Polymer Electrolyte Membrane Fuel Cells". Case Western Reserve University School of Graduate Studies / OhioLINK, 2009. http://rave.ohiolink.edu/etdc/view?acc_num=case1228255795.
Pełny tekst źródłaVickerstaffe, Emma. "The development and application of automated multi-step polymer assisted solution phase synthesis for the production of biologically active compound arrays". Thesis, University of Cambridge, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.614773.
Pełny tekst źródłaSauerwein, Malte [Verfasser], i Holger [Akademischer Betreuer] Steeb. "Simulation of coupled transfer and transport phenomena in multi-phase materials with application to polymer gels / Malte Sauerwein ; Betreuer: Holger Steeb". Stuttgart : Universitätsbibliothek der Universität Stuttgart, 2021. http://d-nb.info/1237270731/34.
Pełny tekst źródłaWEGRZYN, MARCIN. "Nanocomposites of Multiphase Polymer Blend Reinforced with Carbon Nanotubes: Processing and Characterization". Doctoral thesis, Universitat Politècnica de València, 2014. http://hdl.handle.net/10251/36869.
Pełny tekst źródłaWegrzyn, M. (2014). Nanocomposites of Multiphase Polymer Blend Reinforced with Carbon Nanotubes: Processing and Characterization [Tesis doctoral no publicada]. Universitat Politècnica de València. https://doi.org/10.4995/Thesis/10251/36869
TESIS
Henke, M., i G. Gerlach. "A multi-layered variable stiffness device based on smart form closure actuators". Sage, 2016. https://tud.qucosa.de/id/qucosa%3A35622.
Pełny tekst źródłaPhilip, Long Nguyen. "Development of a Multi Radiation Type Survey Meter Using Aromatic Ring Polymers Undoped with Fluorescent Molecules". Kyoto University, 2016. http://hdl.handle.net/2433/217749.
Pełny tekst źródła0048
新制・課程博士
博士(農学)
甲第20066号
農博第2195号
新制||農||1045(附属図書館)
学位論文||H28||N5022(農学部図書室)
京都大学大学院農学研究科地域環境科学専攻
(主査)教授 髙橋 千太郎, 教授 近藤 直, 教授 飯田 訓久
学位規則第4条第1項該当
Subbaraman, Ramachandran. "A multi-scale hierarchical approach for understanding the structure of the polymer electrolyte membrane fuel cell (PEMFC) electrodes - from nanoparticales to composites". online version, 2008. http://rave.ohiolink.edu/etdc/view.cgi?acc%5Fnum=case1205852564.
Pełny tekst źródłaSubbaraman, Ramachandran. "A MULTI-SCALE HIERARCHICAL APPROACH FOR UNDERSTANDING THE STRUCTURE OF THE POLYMER ELECTROLYTE MEMBRANE FUEL CELL (PEMFC) ELECTRODES - FROM NANOPARTICLES TO COMPOSITES". Case Western Reserve University School of Graduate Studies / OhioLINK, 2008. http://rave.ohiolink.edu/etdc/view?acc_num=case1205852564.
Pełny tekst źródłaChauvin, David. "Réalisation d'un capteur optofluidique à champ évanescent à base de microrésonateurs polymères pour la détection ultrasensible d'espèces (bio)chimiques à haute toxicité". Thesis, Université Paris-Saclay (ComUE), 2016. http://www.theses.fr/2016SACLN078/document.
Pełny tekst źródłaHigh sensitivity biochemical sensing is a concern for health, environment and defense. Thanks to the interaction between an analyte and an evanescent field at their surface, label-free polymer microring resonators, in association with a microfluidic channel, form an optofluidic sensor that can be used for biosensing. This thesis shows the realization of versatile optofluidic sensors based on polymer microring resonators combining a high detection limit with a short response time. High limit of detection of heavy ions in tap water was obtained after a careful optimization of the optical and microfluidic designs, signal processing, methodology of detection, surface chemistry and instrumentation. By functionalizing the resonator surface with 2,2’-((4Amino-1,2- Phenylene)Bis(Carboxylatoazanedyil))Diacetate, we obtained a limit of detection of 50 pmol/L in deionized water and 500 pmol/L in tap water. It should be stressed that the functionalized surface of the resonator was regenerated more than 60 times, enabling several sensing experiments with the same resonator. Besides, we were able to optimize the measurement sensitivity by an analysis of the orthogonal polarizations TE and TM from the sensor optical response. The simultaneous use of at least two microresonators in parallel (providing a reference signal and allowing multiplexing) enabled us to improve measurement accuracy and to compensate the signal from various external perturbations such as pressure, temperature and non-specific bindings. These “multi-sensors” are essential for (i) an in-depth understanding of surface reaction mechanism, (ii) an evaluation of the binding efficiency of different functionalization protocols and (iii) a high throughput characterization tool for multiple detections of pollutants
Stradins, Linards. "Simulating the flow of multi-domain/multi-viscous polymer blends during polymer processing using the boundary element method". 1993. http://catalog.hathitrust.org/api/volumes/oclc/32485953.html.
Pełny tekst źródłaTypescript. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaves 64-66).