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Showing 1 to 12 of 12 for “"ketimine"”.
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Aqueous poly(arylene ether ether ketone) suspensions
… precursor, poly(pyridine ether-co-ether ether ketimine), onto PEEK particles from a organic solvent, followed by hydrolysis of the ketimine moiety on this particle coating in conjunction with protonation of the pyridine units, forming a protonated form of poly(pyridine ether-co-ether ether …
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Synthesis and Characterization of Hydrophobic-Hydrophilic Multiblock Copolymers for Proton Exchange Membrane Applications
… the synthesis and processing, removable bulky ketimine was introduced to synthesize amorphous pre-oligomers poly(ether ether ketimine) (PEEKt). The synthetic procedure first involves the synthesis of hydrophobic poly(ether ether ketimine)-hydrophilic sulfonated poly(arylene ether sulfone) …
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Investigations into the roles and molecular mechanisms of LanC-like proteins
… 4, the role of LanCL proteins in lanthionine ketimine biosynthesis was investigated. The detection of lanthionine ketimine in LanCL triple knockout mice argues against an essential role of LanCL proteins in this pathway and suggests the need for a systematic screening for potential LanCL …
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Chemistry of the Degradation of Vinyl Polymers to give Carbon Fibre Precursors
… is proposed. Before cyclisation the propogating ketimine groups (>C =H) undergo tautomeric rearrangement to the enamine form ( >C-=C—NH2,), Subsequent cyclisation results in a condensed 1 ,4.-dihydropyridine structure which, by analogy with the known chemistry of 1,4-dihydropyridines, will …
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The preparation of high performance polymers for composites and blends: A) thermally stable ion containing polymers B) epoxy and hydroxy functional polyolefin macromers
… containing sulfone, sulfoxide, phosphine oxide, ketimine, and ketone moieties. These pyridine containing poly(arylene ether)s can function as electrostatic stabilizers, but not as the more efficient steric stabilizers. ThE: second approach endeavored to form controlled molecular weight …
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The preparation of some unsymmetrical ortho substituted ̲o-dibenzoylbenzenes and 1,3-diphenylisobenzofurans
… and subsequent hydrolysis of the intermediate ketimine. These were oxidized to the corresponding o-dibenzoylbenzenes (II), 2’-methyl-2-benzoy1 benzophenone (LIV), and 2'-methoxy-2- benzoylbenzophenone (LVII), by the use of sodium dichromate and sulfuric acid, Reduction of these with zinc dust …
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Crystallization and melting behavior of an aromatic semicrystalline polyimide, LaRC CPI-2
… weights and a suppression of a cross-linking ketimine reaction in the polymer produced in m-cresol.
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The synthesis, stabilization and sintering of high performance semicrystalline polymeric powders
… an amorphous PEEK derivative, poly(ether ether ketimine). This monomer can also be statistically copolymerized with 4,4'-difluorobenzophenone to afford a semicrystalline, soluble PEEK derivative. Acid catalyzed hydrolysis of these derivatives to insoluble PEEK can be used to generate submicron …
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Nichtwässrige Synthese und Bildungsmechanismus von Übergangsmetalloxid-Nanopartikeln = Nonaqueous synthesis of transition-metal oxide nanoparticles and their formation mechanism
… in analogy to the synthesis in ketones, induce ketimine and aldol condensation reactions. In the last section of this work, surface functionalization of anatase nanoparticles is explored. The particles were first capped with various organic ligands via a facile in situ route, which resulted in …
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The preparation of polynuclear compounds containing the thiophene ring system
… mixture. 2-(1-Naphthylmethyl)-phenyl-2-thienylketimine formed from the condensation between 2-(1'-naphthylmethyl)- benzonitrile and 2-thienylmagnesiumbromide resisted hydrolysis to the corresponding ketone but cyclized quantitatively to 10-(2-thienyl)-l,2-benzanthracene. Following the classical …
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Crystallization behavior and structure property behavior of selected thermoplastic polymers
… PEEK-PSX, multi block copolymers and their ketimine precursors, PEEKt-PSX, were investigated. A dran1atic dependence on thermal history prior to crystallization was observed in both block copolymer systems. Block copolyn1crs crystallized from the glassy state obtained a much higher degree of …
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Investigations into cyclopropanation and ethylene polymerization via salicylaldiminato copper (II) complexes
Two distinct overall research objectives are in this Master’s thesis. Very little relates the two chapters apart from the ligands. The first chapter addresses diastereoselective homogeneous copper catalyzed cyclopropanation reactions. Cyclopropanation of styrene and ethyl diazoacetate (EDA) is a …