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The Global ETD Search service is a free service for researchers
to find electronic theses and dissertations. This service is
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Networked Digital Library of Theses and Dissertations.
Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
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Showing 61 to 70 of 151 (0.061 seconds)| 61 |
Synthesis and Complexation of Functionalized Mixed Thia-Aza-Macrocyclic and Medium Sized LigandsMalasi, Wilhelm S. 09 June 2009 (has links)
No description available.
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Amine-Containing Mixed-Matrix Membranes Incorporated with Amino-Functionalized Multi-walled Carbon Nanotubes for CO2/H2 SeparationYang, Yutong January 2019 (has links)
No description available.
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Side-Chain Modification for Self-Assembling Conductive Polymer ScaffoldsHogg, Jacob January 2022 (has links)
No description available.
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Functionalized Sulfone and Sulfonamide Based Poly(arylene ether)sAndrejevic, Marina 05 August 2014 (has links)
No description available.
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Self-Assembly of Carboxylic Acid-Functionalized Hydrophilic Fullerene Macroanions in Dilute SolutionWu, Jiayingzi 29 May 2015 (has links)
No description available.
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Iodo Containing Sulfone and Sulfonamide Based Poly(arylene ether)sConstandinidis, Fadwa G. 27 August 2013 (has links)
No description available.
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Tuning the Physical Properties of Poly(arylene ether)s Prepared from 3,5-Difluorobenzene SulfonamidesMitton, Renata 12 August 2015 (has links)
No description available.
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Thermal Properties of Poly(arylene ether)s Prepared from N,N-Dialkyl-2,4-DifluorobenzenesulfonamidesWaweru, James Kanyoko 20 December 2016 (has links)
No description available.
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Novel Regenerable Adsorbents for Wastewater Treatment from Wet Flue Gas ScrubbersSanghavi, Urvi January 2016 (has links)
No description available.
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Synthesis and characterization of rigid nanoporous hypercrosslinked copolymers for high surface area materials with potential hydrogen storage capabilitiesZhou, Xu 11 January 2011 (has links)
Hydrogen storage remains a major technological barrier to the widespread adoption of hydrogen as an energy source. Organic polymers offer one potential route to useful hydrogen storage materials. Recently, Frechet and his coworkers described a series of hypercrosslinked polymers with high surface area and studied their surface properties and hydrogen storage capacities. McKeown and his coworkers studied a class of materials termed Polymers of Intrinsic Microporosity (PIMs) which are also based on a "hypercrosslinked" concept. We enchained N-substituted maleimide and functionalized stilbene alternating copolymers into a "hypercrosslinked system" to achieve high rigidity, high surface areas, high aromatic content and good thermal stability.
Hypercrosslinked copolymers of N-(3-methylphenyl)maleimide (3MPMI), 4-methyl stilbene (4MSTBB), vinylbenzyl chloride (VBC) and divinyl benzene (DVB) were synthesized. Scanning electron micrographs (SEM) show the copolymers are porous and some examples have shown surface areas over 1200 m²/g. We have also found the incorporation of 3MPMI and 4MSTBB improves the thermal stability and raises the glass transition temperature of the copolymer. However, the incorporation of 3MPMI and 4MSTBB decreases the hypercrosslinking density and therefore causes a decrease in the copolymer surface area. The systematic study of styrene (STR) – vinylbenzyl chloride (VBC) – divinyl benzene (DVB) networks indicates that a low density of chloromethyl groups leads to a decrease in surface area. Therefore, we are continuing to investigate other monomers, such as N-substituted maleimide and functionalized stilbene containing chloromethyl groups, in order to enhance thermal stability while maintaining surface area.
In order to increase the enthalpy of hydrogen adsorption and thus raise the temperature of hydrogen storage, the monomer N,N-dimethyl-N',N'-diethyl-4,4'-diaminostilbene (4,4'DASTB-3MPMI) which contains electron donating groups was incorporated into hypercrosslinked polymer particles. Hypercrosslinked polymer (4,4'DASTB-3MPMI)1.0(VBC)98.5(DVB).50 exhibits a surface area of 3257 m²/g. / Master of Science
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