Imidized form
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 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…
Imidized form
Did you know?
Witryna16 gru 1994 · About 10 to about 95% of the amic acid groups in the polyamic acid are imidized, forming a partially imidized polyamic acid. A more concentrated solution of the partially imidized polyamic acid is prepared and about 0.1 to about 10 wt % of a thixotrope is mixed with the more concentrated solution to form a paste. WitrynaTo this silver(I) solution, 2.00 g of the fully imidized form of 6FDA/0.5 ODA-0.5 DABA copolymer was added followed by 4.0 g DMAc. The resulting solution was stirred for 1 h. The silver-doped solution was cast onto a glass plate at a thickness of 0.45 mm. The film was placed in a film box for 15 h with dry air flowing through the box to
Witryna11 cze 2024 · Read "10.1016/j.polymer.2009.02.009" on DeepDyve, the largest online rental service for scholarly research with thousands of academic publications available at your fingertips. WitrynaDue to an all-aromatic structure, these high-performance polymers are exceptionally chemically and thermally stable but are not conventionally processable in their …
Witryna2 maj 2016 · After being removed from the substrate, the polymer films were washed several times with hot ethanol–water mixture (1:1, v:v) to extract the residual high-boiling solvent and afterward dried in a vacuum oven at 100 °C. In all cases, the fully imidized form of the polymers was used to prepare films with the thickness of 40–60 μm. … Witryna1 sty 2007 · Thermoplastic polyimides, when used as adhesives in fully imidized form, exhibit a viscoealstic solid-like behavior and require high pressure to achieve proper wetting of the adherend surface. In this study adhesive strength of partially imidized thermoplastic polyimide films in bonded joints is investigated when processed at low …
Witryna5. The method of fabricating a liquid crystal display device according to claim 3, wherein in applying the alignment film, an ink-jet coater is used in which coating conditions are established such that the region outside the display region receives a larger amount of jetted alignment material or a larger number of jets of the alignment material than the …
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 … finger stick ac hsWitryna7 lut 2002 · Imidized polymers, once thought too exotic for all but aerospace components, now serve in more down-to-earth applications thanks to optimized formulations and broader processing options. finger stick achsWitryna15 wrz 2015 · When the imidized forms were highly soluble, PAAs were chemically imidized as previously described [14], [16], [19]. The imidized samples isolated as … fingers that won\u0027t bendWitrynaDue to an all-aromatic structure, these high-performance polymers are exceptionally chemically and thermally stable but are not conventionally processable in their … fingers terminologyWitrynaorganic solvents in its fully imidized form. While Cornelius et al. [10], and Wen et al. [11], reported that introducing silicone segment network into PI matrix, enhanced the excellent multifunctional properties of PI. Chang and Wu [12] studied the degradation process of PI siloxane (PIS) copolymer in common type 30,4,40-benzo- escalation forceWitrynathe imidized forms are virtually always insoluble in all organic solvents. EXPERIMENTAL DETAILS Materials. 2,2-Bis(3,4 … escalation procedure templateWitryna22 sie 2024 · The polyimide films exhibit CTE between 17 and 57 ppm/K. Comparing the CTE of PI(CpODA+3,4′-DDE) films, the value of chemically imidized film is lower than that of the thermally imidized one. In plain-oriented polymer chain, orientation relaxation might occur at high temperature in the curing process. escalation work meaning