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.
Results
Showing 1 to 6 of 6 for “"Polybenzimidazoles"”.
-
Synthesis and Chacterization of Novel Polybenzimidazoles and High-Solids Meta-Polybenzimidazoles
<p>Polymer electrolyte membrane (PEM) fuel cells are one of the most promising alternative power devices available due to their multiple applications as well as their clean and efficient operation. PEM fuel cells that operate at high temperatures (> 120oC) have advantages over low temperature PEM …
-
Synthesis and Characterization of Novel Polybenzimidazoles and Post-modifications for Membrane Separation Applications
Polybenzimidazoles, a class of aromatic heterocyclic polymers, are well known due to their remarkable thermal stability, mechanical properties and chemical resistance which are often required in extreme operation conditions. Because of these properties, polybenzimidazoles are excellent candidates …
-
Kinetic and mechanistic investigations of polyimide formation and characterization of their blends with polybenzimidazoles
This dissertation describes kinetic and mechanistic studies of high performance polyimide formation, synthesis and characterization of fully cyclized, molecular weight and end group controlled polyimides, and investigations of high performance polymer blends based upon polyimides and …
-
Synthesis and Characterization of High Performance Polymers for Gas Separation Membranes
… especially polyimides, polybenzoxazoles and polybenzimidazoles for gas separation applications. An abundance of monomers and novel polymers were synthesized and fabricated into membranes. Thermally rearranged polybenzoxazoles and their precursor polyimides were systematically studied with …
-
Synthesis and Characterization of High Performance Polymers for Gas Separation and Water Purification Membranes and as Interfacial Agents for Thermplastic Carbon Fiber Composites
… of high performance polymers, specifically polybenzimidazoles (PBIs) for gas separation applications and polyimides (PI) for water purification and as interfacial agents for thermoplastic carbon fiber composites. Two methods for improving the gas transport properties (for H2/CO2 separation) …
-
Novel Polyphenylquinoxaline and Polybenzimidazole Proton Exchange Membranes For High Temperature Fuel Cell Systems
… and better utilization of system-generated heat. Polybenzimidazoles (PBIs) have been identified as one of the most prominent candidates for high temperature PEMFCs due to their excellent thermal and oxidative stability, as well as their proton conducting ability.</p><p>Recently, a novel process …