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 10 of 10 for “"crystalline behavior"”.
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Wet-spinning of neat single-walled carbon nanotube fiber from 100+% sulfuric acid
… chlorsulfonic acid. The solutions display liquid crystalline behavior at high concentrations in super acids. Traditional wet-spinning method has been applied to SWNTs to make fibers from SWNTs only with the assistance of 100+% H2SO 4 (neat SWNT fibers). Extensive conditions, including …
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Synthesis and characterization of polyether-ester liquid crystalline polyesters and poly(arylene ether ketone)-lcp segmented copolymers
… be thermoxidatively stable. Thermotropic liquid crystalline polyesters (LCPs) are well known for their thermoxidative stability, ductility, solvent resistance and the potential of generating extremely strong, stiff molecular chains. In this dissertation research, several novel liquid crystalline …
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Isolation of Cellulose Nanocrystals: Data-Driven Identification of Key Factors Affecting Yield and Morphology
… in the CNCs, strongly affecting their liquid crystalline behavior. To facilitate further examination of the process while minimising experimental bias, a continuous laboratory-scale setup was also engineered. By combining data-driven modelling, experimental investigation, and process …
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DESIGN, SYNTHESIS, AND CHARACTERIZATION OF INDANE 2,5-DIKETOPIPERAZINES FOR LIQUID CRYSTAL APPLICATIONS
… DKPs previously investigated exhibited liquid crystalline behavior. A new class of DKPs with one alkoxy substituent, rather than two, on each benzene ring has been synthesized. Thermochemical studies of the new DKPs by differential scanning calorimetry and polarized optical microscopy show that …
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The Pressure Dependence of the Low Temperature Thermal Properties of an Amorphous Polymer
The low-temperature behavior of glasses has been described as anomalous for its marked differences from crystalline behavior and as universal for its apparently weak dependence on chemical composition of the glass. For temperatures below 1 K the phenomemological Tunneling Model and the existence of …
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The pressure dependence of the low-temperature thermal properties of an amorphous polymer
The low-temperature behavior of glasses has been described as anomalous for its marked differences from crystalline behavior and as universal for its apparently weak dependence on chemical composition of the glass. For temperatures below 1 K the phenomemological Tunneling Model and the existence of …
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Towards scalable solid-state spin qubits and quantum simulation of thermal states
… driving pulses that can be used to induce time crystalline behavior and probe the conditions under which this behavior can exist, finding that it should be realizable with current experimental capabilities. Next, we use a correspondence between quantum time evolution geometric space curves to …
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Fabrication and Characterization of Horizontally Aligned Carbon Nanotube Thermoplastic Bulk Nanocomposite Laminates
… covalent bonding between CNTs and PMMA. The crystalline behavior of PMMA was studied via dynamic scanning calorimetry (DSC) as well as X-ray diffraction (XRD), which demonstrated that BNL processing temporarily lowers neat PMMA glass transition temperature T_g by 4 ◦C with no permanent change …
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Deformation induced molecular behavior of Cis 1,4-polyisoprene and its nanocomposites monitored by solid-state NMR
… typical value for plastic crystals. This plastic crystalline behavior suggests that in the high temperature phase, the POSS molecules will undergo plastic flow at relatively low levels of stress. Therefore, in the high temperature phase POSS will not enhance mechanical behavior in the same manner …
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Interactions of Cellulose Nanocrystals in Colloidal and Composite Systems
… films, and their orientation-dependent liquid crystalline behavior in suspensions. Cellulose nanocrystals (CNCs) have seen a particular prominence due to their versatility across a breadth of applications. The unique structure of CNCs, represented as nanoscale rods with a slight twist, provides …