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Showing 1 to 17 of 17 for “"polysulfones"”.
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Characterization of polymeric membranes: sulfonated polysulfones
Sulfonated polysulfone has been shown to possess desirable physical properties for use as a reverse osmosis desalination membrane. In this work, an extensive of dense membranes made from sulfonated polysulfone having 0.2, 0.4, 0.5, 0.6, 0.8, and 1.0 degree of sulfonation is described. The degree of …
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Hydration Mechanisms in Sulfonated Polysulfones for Desalination Membrane Applications
… water content, and the bulk properties. The polysulfones investigated here are aromatic polymers with relatively high ion contenremain in the glassy state at room temperature even when fully hydrated. In order to better understand the effects of water on these ionic polysulfones molecular …
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I. Structure of Polymethyl Alpha-Haloacrylates. Ii. Structure of Polysulfones
Made available in DSpace on 2015-05-12T17:02:27Z (GMT). No. of bitstreams: 2 license.txt: 4848 bytes, checksum: 96035ab3f5e1c23cc7138a224ce498bd (MD5) 0006022.PDF: 4962561 bytes, checksum: 3dacd7b1b77c597470adbb560c79d054 (MD5) Previous issue date: 1953
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Synthesis and Characterization of Branched Ionomers for Performance in Ionic Liquid – Swollen Ionic Polymer Transducers
… Controlled branching is achieved in sulfonated polysulfones (sBPS) through employment of an oligomeric A₂ + B₃ step-growth polymerization. Structure – property relationships are established for a series of linear and branched sulfonated polysulfones to resolve the effects of polymer topology and …
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Designing Functionality into Step-Growth Polymers from Liquid Crystallinity to Additive Manufacturing
… applicable polymers, such as polyesters and polysulfones. The choice of backbone and end group structure within these polymers drastically impacts the final material properties and processability emphasizing the necessity for thorough understanding of structure-property relationships. …
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Structure-property relationships of functionalized modifiers for thermosetting resin systems
… separation. In contrast, the functionalized polysulfones were shown to be effective toughening agents, with the resultant morphology primarily a function of percent incorporation. At ~15% w/w, the polysulfone separated as l-2μm discreet particles while a 30% loading level resulted in a …
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Structure-Property Relationships in the Design of High Performance Membranes for Water Desalination, Specifically Reverse Osmosis, Using Sulfonated Poly(Arylene Ether Sulfone)s
… of a non-sulfonated active polysulfone. The polysulfones from direct polymerization incorporated specialty sulfonated monomers, which were stoichiometrically controlled during the polymerization. Sulfonated polysulfones that were synthesized from post sulfonation incorporated biphenol and …
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Synthesis, properties, and modifications of engineering polymers
… of these materials were also examined. Polysulfones were characterized to be tough, ductile materials and it was found that polysulfone-poly(dimethylsiloxane) block copolymers blends with homopolysulfone serves to further increase their ductility as indicated by fracture toughness …
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High Performance Engineering Polymers: Design, Properties, and Performance
… probed various polymer families including polysulfones, polyesters, polyimides and polyureas. Copolymers ranging from random to segmented sequences provided insight into the influence of segment length on physical properties. Melting temperatures, glass transition temperatures, and …
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Synthesis, Characterization and Structure - Property Relationships of Post - sulfonated Poly(arylene ether sulfone) Membranes for Water Desalination
… membrane process of reverse osmosis. Sulfonated polysulfones are a potential alternative to state-of-the-art thin film polyamides. Synthesized by step growth polymerization, polysulfone membranes have smooth surfaces and they are more chemically resistant relative to polyamides. Previously …
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Study on the effect of zeolite rice husk particles on polysulfone membrane
… obtained from rice husk ash (RHA). The RHY/polysulfones (PSf) membranes incorporated with RHY particle at different loading were prepared through phase inversion technique. Physical characterization were carried out using thermogravimetric analysis (TGA), scanning electron microscope (SEM), …
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Synthesis and Characterization of Poly(arylene ether sulfone)s with Novel Structures and Architectures
… phenols were attached to the terminal groups of polysulfones by this method. A novel cyclohexyl-containing difunctional monomer was prepared and successfully incorporated into poly(arylene ether sulfone) backbones. These polymers were characterized by NMR, SEC, DSC, TGA, DMA and tensile tests and …
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Complexation of metal salts with phosphorus-containing poly(arylene ether)s
… high performance thermoplastics, such as the polysulfones, e.g. UDEL@ and polyether ketones, e.g. PEEK@, PEKK@, etc. The PEPO materials show an elevated glass transition temperature, high thermal and oxidative stability, improved solubility, and increased flame resistance. It has been …
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Structure-property behavior of novel high performance thermoplastic and thermoset structural adhesives and composite matrix resins
… and good mechanical properties. Biphenyl-based polysulfones were synthesized and endcapped with 3-phenyl ethyny] functional groups. High Tg, thermostable, ductile and solvent resistant networks were prepared after curing at 380°C. Thermo-mechanical behavior, including tensile properties and …
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Synthesis and Characterization of Poly(arylene ether sulfone)s for Reverse Osmosis Water Purification and Gas Separation Membranes
… of swelling that non-crosslinked sulfonated polysulfones undergo. The crosslinked oligomers had the best water purification properties reported for sulfonated polysulfone, with similar water permeabilities and an order of magnitude higher selectivity (Pw/Ps = 1.69 ± 0.13 x 103) than analogous …