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Showing 1 to 20 of 87 for “"poly(arylene ether)"”.
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Physical and mechanical behavior of amorphous poly(arylene ether)ketone and poly(arylene ether)ketone modified bismaleimides
Bisphenol-A based poly(arylene ether)ketones (PAEKs) are tough, amorphous processable thermoplastics possessing a glass transition temperature of approximately 160°C. In the form of a thermoset, these polymers have potential usages as structural engineering matrix resins or adhesives, as well as …
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Aqueous poly(arylene ether ether ketone) suspensions
… laboratories for processing fiber reinforced, polymer matrix composites with environmental concern by using water instead of toxic organic solvents. This method requires that the polymers be in the form of a stable aqueous colloidal dispersion. This thesis describes the preparation of submicron …
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Synthesis of poly(arylene ether sulfone)-polyimide segmented copolymers
Poly(arylene ether sulfone) oligomers have been synthesized by nucleophilic aromatic substitution using potassium carbonate as base and N-methyl pyrrolidinone (NMP) as solvent. m-Aminophenol was used as an endcapper to control the molecular weight of the oligomers and to provide functional amine …
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Synthesis and Characterization of Hydrophilic-Hydrophobic Disulfonated Poly(Arylene Ether Sulfone)-Decafluoro Biphenyl Based Poly(Arylene Ether) Multiblock Copolymers for Proton Exchange Membranes (PEMs)
Hydrophilic/hydrophobic block copolymers as proton exchange membranes (PEMs) has become an emerging area of research in recent years. Three series of hydrophilic/hydrophobic, fluorinated/sulfonated multiblock copolymers were synthesized and characterized in this thesis. These copolymers were …
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Synthesis and Characterization of Phosphorus Containing Poly(arylene ether)s
… and characterization of phosphorus containing poly(arylene ether)s were investigated to determine the effect of phosphorus upon the thermal stability, mechanical strength, and fire resistance of thermoplastics. Phosphorus containing activated aromatic dihalides and bisphenols were synthesized …
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Synthesis and characterization of phosphorus containing poly(arylene ether) systems
The synthesis and characterization of poly (arylene ether) s containing the phosphine oxide unit along the backbone were investigated and unique properties derived from the presence of this moiety were identified. The preparation of crucial phosphine oxide containing monomers which would be …
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Modified Poly(arylene ether sulfone) Compositions and their Segmented Block Copolymers
A series of modified poly(arylene ether sulfone)s (PAES) incorporating hexafluoroisopropylidene units and co-monomers, bisphenol A (BA), 4,4′-dihydroxyterphenyl (DHTP) and triptycene-1,4-hydroquinone (TPDH), were synthesized using a polyetherification synthetic method. These thermoplastic PAES were …
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Complexation of metal salts with phosphorus-containing poly(arylene ether)s
Poly(arylene ether phosphine oxide)s (PEPO) are a recently identified subset of an important macromolecular series which includes industrially important high performance thermoplastics, such as the polysulfones, e.g. UDEL@ and polyether ketones, e.g. PEEK@, PEKK@, etc. The PEPO materials show an …
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Gas permselectivity in amorphous linear and crosslinked poly(arylene ether ketones)
… on the gas transport properties through a dense polymer film of amorphous Poly(Arylene Ether Ketones) or PEK. The methodology for the preparation of crosslinked maleimide terminated PEK (or MIPEK) films from several blend ratios of different molecular weights of MIPEK is discussed in detail. The …
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Direct Polymerization Of Sulfonated Poly(arylene ether) Random Copolymers And Poly(imide)Sulfonated Poly(arylene ether) Segmented Copolymers: New Candidates For Proton Exchange Membrane Fuel Cell Material Systems
… with 4,4′-biphenol under nucleophilic step polymerization conditions to generate a series of high molecular weight, film-forming, ductile, ion conducting copolymers. These were converted to the acid form and investigated as proton exchange membranes for fuel cells. Hydrophilicity increased …
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Crystallization and structure-property investigations of semicrystalline poly(arylene ether) based polymers
… characteristics of selected high temperature poly(arylene ether) based polymers. The first part deals with the studies carried out on a series of biphenol and hydroquinone based novel poly(ether ether sulfide)s which were investigated with respect to their crystallization and morphological …
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Benign Processing of High Performance Polymeric Foams of Poly(arylene ether sulfone)
… with the production of high performance polymer foams via a benign foaming process. The first goal of this project was to develop a process and the conditions necessary to produce a low density (>80% density reduction) foam from poly(arylene ether sulfone) (PAES). Water and supercritical …
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Synthesis and Characterization of Sulfonated Poly(arylene ether sulfone)s for Membrane Separations
Sulfonated poly(arylene ether sulfone)s are a class of engineering thermoplastics well-known for their mechanical properties and chemical/oxidative stability. The research in this dissertation focuses on modifying the structure of sulfonated poly(arylene ether sulfone)s to improve membrane …
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Synthesis and basic characteristics of segmented poly(arylene ether sulfone)-poly(arylate) copolymers
Segmented copolymer systems composed of an amorphous g1assy engineering polymer as one segment and a potentially anisotropic polyester as the second segment were synthesized and investigated. The engineering thermoplastic segment was based on various all aromatic poly(arylene ether sulfooes) …
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Synthesis and Characterization of Poly(arylene ether sulfone)s with Novel Structures and Architectures
Poly(arylene ether sulfone)s with dendritic terminal groups were synthesized by step-growth polymerization of two difunctional monomers in the presence of preformed dendritic end-cappers. These polymers were characterized by NMR, SEC, DSC, TGA, melt rheology and tensile tests. The melt viscosities …
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Synthesis and Characterization of trans-1,4-Cyclohexylene Ring Containing Poly(arylene ether sulfone)s
Poly(arylene ether sulfone)s (PAES) are important commercial polymers and have been extensively studied due to their excellent thermal and mechanical properties. However, some applications are still limited when good solvent resistance and low thermal expansion coefficient are required. There has …
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Solution-casting of Disulfonated Poly(arylene ether sulfone) Multiblock Copolymer Films for Proton Exchange Membranes
… final morphology and properties of disulfonated poly(arylene ether sulfone) multiblock copolymer films from the viewpoint of phase separation of block copolymers. Of equal importance to this work, is a possibility of utilizing a rheological technique for monitoring the transformation and kinetics …
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Effect of Backbone Structure on Membrane Properties for Poly(arylene ether) Random and Multiblock Copolymers
Poly(arylene ether)s are a well-established class of thermoplastics that are known for their mechanical toughness, thermal stability, and fabrication into membranes. These materials can undergo a myriad of modifications including backbone structure variability, sulfonation, and crosslinking. In …
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Synthesis and characterization of poly(arylene ether)s containing phosphorus, sulfur and heterocyclic pendant moieties
Poly(arylene ether)s containing phosphorus, sulfur, and heterocyclic pendant moieties were synthesized and their properties investigated. The preparation of monomers containing phosphorus as well as monomers derived from phenolphthalein were synthesized in high purity. These monomers were then …
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