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 “"Liquid crystal polymer"”.
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The rheology of liquid crystal polymer blends.
… and explanation of the interaction between liquid crystal and isotropic polymers. An investigation of the rheological behaviour has been carried out on blends containing small additions of a main chain thermotropic liquid crystal polymers using capillary rheometry. Samples of these blends …
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Exploration of liquid crystal polymer packaging techniques for rf wireless systems
In the past decade, there has been an increased interest in low-cost, low-power, high data rate wireless systems for both commercial and defense applications. Some of these include air defense systems, remote sensing radars, and communication systems that are used for unmanned aerial vehicles, …
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Molecular simulation of liquid crystal polymer flow : a wavelet-finite element analysis
… distribution function, f, of rigid rod polymers in flow. These methods were used to investigate the liquid crystal polymer (LCP) system. Second, the distribution function calculations were incorporated into a discontinuous Galerkin finite element framework for the modeling of complex LCP …
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Synthesis, Characterization, Membrane Fabrication and Gas Transport Behavior of Liquid Crystal Polymer Materials
A variety of liquid crystalline (LC) materials have been examined as potential membrane separation materials. The order present in the LC phases has measurable effects on solute sorption, diffusivity, permeability, and selectivity, and can thus be used to tune the transport and separation of …
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Development of polymer bonded magnets with enhanced magneto-mechanical properties for high temperature and aggressive environments
… silane coupling agent prior to blending with the polymer and subsequent molding of the composite. The coated rare earth powders are ready for injection molding when highly packed and the coating is capable of withstanding mechanical shearing during the polymer blending process. The research also …
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Radio frequency circuit design and packaging for silicon-germanium hetrojunction bipolar technology.
… The packaging effect for the SiGe chip using liquid crystal polymer (LCP) is presented and methodology to derive the model for the package is discussed. Chapter 1, we discuss the overview and benefits of SiGe HBT technology in high frequency circuit design. Chapter 2 presents the methodology …
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Novel interphases: Synthesis, molecular orientation and grafting of liquid crystal polymers on carbon fibers
… has been to study composite materials containing liquid crystal polymers either as matrices or in interfacial boundary zones. The fundamental point of interest here is the interfacial response that fiber surfaces can potentially induce in self ordering polymers. This investigation includes studies …
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Finite element simulation of electrorheological fluids
… in an insulating base fluid or composed of liquid crystal polymer. To build more suitable and complicated designs for application of ER fluid, the simulation of ER fluid as well as experiments are important. First, fundamental fluid motions of Newtonian fluids are simulated and checked by …
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Design and development of novel radio frequency identification (RFID) tag structures
… can be realized on flexible substrates such as liquid crystal polymer (LCP), paper-based substrate and magnetic composite material for conformal applications. The demand for flexible RFID tags has recently increased tremendously due to the requirements of automatic identification in various …
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Studies of blends containing liquid crystalline polymers with PET and related investigations of hydroquinone/biphenol polysulfone systems
… cast films prepared from blends of thermotropic liquid crystalline copolyesters with polyethylene terephthalate (PET). Data were obtained which showed not only the temperature dependence of the moduli and stress-strain behavior but also the orientation effects that must be prevalent in order to …
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Morphological studies of polymeric systems with liquid crystalline order
… structure, properties, and processing of various liquid crystal polymer systems. Morphologies of microphase separated side chain liquid crystal block copolymers are determined, both in the bulk and when confined to thin films. We show for the first time how these materials could potentially be …
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Investigation of physical and electro-optic diffractive structures for energy-efficient smart window applications
… pixelated optoelectronic smart window based on liquid crystal polymer blazed diffraction gratings are also explored and developed.
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Integration of liquid crystals with redox electrolytes in dye-sensitised solar cells
… electric and electrochemical properties of liquid crystal (LC) materials in self-assembly systems, that is, liquid crystal-polymer electrolyte composites (LC-PEs), LC binary mixtures, and their potential application in dye-sensitised solar cells (DSSCs). The birefringence of LCs causes light …
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Additive Manufacturing of Functional Materials for Biomedical Devices
… is used to enhance the functionality of polymers for the improvement of medical devices, including bespoke ankle braces, impact resistance protective paddings, and biomedical surfaces for the regulation of cell growth. Anisotropic, self-assembling, and self-reinforcement hierarchical …
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Enhancing the Effectiveness and Availability of Orthoses by Additive Manufacturing
… wave design parameters. 3D printed using liquid crystal polymer (LCP), the brace harnesses the superior mechanical performance and high stiffness-to-weight ratio of 3D-printed LCP wavy fibres, given the high degree of molecular alignment achieved along the printing direction. Such that …
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Tunable Liquid Crystal Photonic Devices
Liquid crystal (LC)-based adaptive optics are important for information processing, optical interconnections, photonics, integrated optics, and optical communications due to their tunable optical properties. In this dissertation, we describe novel liquid crystal photonic devices and their …
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Nonlinear optical studies of dye-doped nematic liquid crystals
Nematic liquid crystals possess large optical nonlinearities owing to their large refractive index anisotropy coupled with the collective molecular reorientation. Doping absorbing dyes into liquid crystals increases their optical responses significantly due to increased absorption in the visible …