Witryna18 maj 2012 · However, polyimides are often insoluble and intractable in their fully imidized form, thus showing severe difficulties in processing. This is why a two step … Polyamide-imides are commercially used for coatings and molded articles. The product used mainly for coatings is sold in a powdered form and is roughly 50% imidized. One of the major uses is as a magnet wire enamel. The magnet wire enamel is made by dissolving the PAI powder in a strong, aprotic solvent such as N-methyl pyrrolidone. Diluents and other additives can be added to provide the correct viscosity for application to the copper or alu…

Silver-Polyimide Nanocomposite Membranes: Self-Generated …

In organic chemistry, an imide is a functional group consisting of two acyl groups bound to nitrogen. The compounds are structurally related to acid anhydrides, although imides are more resistant to hydrolysis. In terms of commercial applications, imides are best known as components of high-strength … Zobacz więcej Most imides are cyclic compounds derived from dicarboxylic acids, and their names reflect the parent acid. Examples are succinimide, derived from succinic acid, and phthalimide, derived from phthalic acid. For … Zobacz więcej Many high strength or electrically conductive polymers contain imide subunits, i.e., the polyimides. One example is Kapton where the repeat unit consists of two imide groups derived from aromatic tetracarboxylic acids. Another example of polyimides is … Zobacz więcej For imides derived from ammonia, the N–H center is weakly acidic. Thus, alkali metal salts of imides can be prepared by conventional bases such as potassium hydroxide. The conjugate base of phthalimide is potassium phthalimide. These anion … Zobacz więcej Being highly polar, imides exhibit good solubility in polar media. The N–H center for imides derived from ammonia is acidic and can participate in hydrogen bonding. Unlike the … Zobacz więcej Most common imides are prepared by heating dicarboxylic acids or their anhydrides and ammonia or primary amines. The result is a Zobacz więcej • IUPAC: imides Zobacz więcej • Inorganic imide Zobacz więcej WitrynaRevue Roumaine de Chimie, 2008, 53(9), 803–811 Dedicated to the memory of Professor Cristofor I. Simionescu (1920–2007) NEW POLYIMIDES CONTAINING can\u0027t find energy saver on mac

RSC Advances

Witrynathe imidized forms are virtually always insoluble in all organic solvents. EXPERIMENTAL DETAILS Materials. 2,2-Bis(3,4-dicarboxyphenyl)hexafluoropropane dianhydride was obtained from Hoechst Celanese and vacuum dried for 5 h at 150 °C. 2,2-Bis[4-(4-aminophenoxy)phenyl]- Witrynathe imidized forms are virtually always insoluble in all organic solvents. EXPERIMENTAL DETAILS Materials. 2,2-Bis(3,4 … Witryna21 lip 2004 · A series of calculations on the three limiting forms of the ODPA monomer have been performed: the uncured monomer in its field-free configuration, the uncured monomer after orienting the functional groups in an external field, and the cured or imidized form of the monomer. bridgehead\u0027s wd