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Showing 1 to 11 of 11 for “"phthalonitrile"”.
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Novel Novolac-Phthalonitrile and Siloxane-Phthalonitrile Resins cured with low melting Novolac Oligomers for Flame Retardant Structural Thermosets
… monomers has led to novel phthalonitrile derivatives with low glass transition temperatures, ranging from -25 to 75 ºC. Multi-functional, low molecular weight phenol-formaldehyde novolac resins were blended with these novel phthalonitrile derivatives to achieve low viscosity …
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Synthesis, Processing, and Properties of Silicon-Containing Phthalonitrile Resins
… environments than their organic counterparts. Phthalonitrile (PN) polymers are excellent candidates for hybridization due to their high thermal stability and glass transition temperatures and their need for improved long-term oxidative stability and toughness. In this work phenyl-substituted …
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From conventional to microphotochemistry: A study of phthalimide and phthalonitrile derivatives
… for the preparation of new phthalimide and phthalonitrile derivatives. Photodecarboxylative (PDC) additions of carboxylates to phthalimides were explored, this work included addition reactions using phenyl acetates, α-keto carboxylates and protected amino acids. Once these photo-additions …
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Synthesis of Phthalocyanines and Porphyrazines for Photodynamic Therapy and Bioalytical Purposes
… formed by cross condensation of maleonitrile or phthalonitrile elaborated with ester or ethylene glycol functions with phthalonitrile covalently bonded to the solid support with an amino linking group. The polymer bound Pc or Pz is separated by filtration, and washing the symmetrical Pc or Pz by …
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High Performance Materials Containing Nitrile Groups
… 4,4′-Bis(3,4-dicyanophenoxy)biphenyl(biphenoxyphthalonitrile). A 700 g mol-1 novolac oligomer was cured with relatively low concentrations of this reagent (~20 wt %) into high Tg (~190 °C) networks. The curing reaction was attrubuted to nucleophilic attack of the phenolic hydroxyl on the …
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Synthesis of novel red-shifted phthalocyanines
… Pc. The one-step bromination to prepare 4-bromophthalonitrile was reported to produce a mixture containing up to three products, we found controlling the stiochiometric ratio of phthalonitrile to dibromoisocyanuric acid could give single product: 4-bromophthalonitrile in 3 3% yield. In chapter …
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Synthesis, crosslinking and characterization of disulfonated poly(arylene ether sulfone)s for application in reverse osmosis and proton exchange membranes
… such as methacrylate, multifunctional epoxy, phthalonitrile and phenylethynyls were investigated. A wide range of crosslinking chemistries i.e. free radical (methacrylate), step growth (epoxy), heterocyclic (phthalonitrile) and acetylenic (phenylethynyl) was explored. The effects of …
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A study of methods of preparation of phthalaldehyde
… of nitriles to prepare phthalaldehyde from phthalonitrile. The method apparently failed completely of aldehyde formation, but the eventual fate of the nitrile in the reduction was not ascertained. The possibility exists that with a stronger reducing couple such as stannous bromide and …
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NMR Relaxometry and Diffusometry Studies for Investigating Heterogeneous Catalysis
… nitrile hydrogenations (benzonitrile and phthalonitrile) over a Pd/Al<sub>2</sub>O<sub>3</sub> catalyst. These were subsequently tested in the continuous flow TBR under near-ambient conditions. Batch reactions revealed information on the inter- particle chemical kinetics, conversion, and …
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Cobalt Nanoparticle-Macromolecular Complexes and Their Conversion to Oxidatively Stable Entities
… particles stabilized with poly (4-vinylphenoxyphthalonitrile-co-4-vinylphenoxytriethoxysilane-g-dimethylsiloxane) graft copolymers. Moreover, cobalt nanoparticles encapsulated with either phthalonitrile networks or graphitic char were prepared via the thermal treatment of nanoparticles …
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Preparation and Functionalization of Macromolecule-Metal and Metal Oxide Nanocomplexes for Biomedical Applications
… groups onto the siliceous-cobalt nanoparticles.Phthalonitrile containing graft copolysiloxanes were synthesized and investigated as enhanced oxygen impermeable shell precursors for cobalt nanoparticles. The siloxane provided a silica precursor whereas the phthalonitrile provided a graphitic …