Cas: 2657-87-6 was involved in experiment | Journal of Macromolecular Science, Part A: Pure and Applied Chemistry 2017

3-(4-Aminophenoxy)aniline is one of ethers-buliding-blocks. Ethers lack the hydroxyl groups of alcohols. Without the strongly polarized O―H bond, ether molecules cannot engage in hydrogen bonding with each other. Product Details of 2657-87-6Ethers do have nonbonding electron pairs on their oxygen atoms, however, and they can form hydrogen bonds with other molecules (alcohols, amines, etc.) that have O―H or N―H bonds.

Chen, Yung-Chung;Hsiao, Sheng-Huei;Wu, Cheng-Hsin published 《Thermally stable and organosoluble poly(amide-imide)s based on the imide ring-preformed dicarboxylic acids derived from 3,4′-oxydianiline with trimellitic anhydride and 6FDA》 in 2017. The article was appeared in 《Journal of Macromolecular Science, Part A: Pure and Applied Chemistry》. They have made some progress in their research.Product Details of 2657-87-6 The article mentions the following:

A diimide-dicarboxylic acid (DIDA) was prepared from the condensation reaction of trimellitic anhydride (TMA) and 3,4′-oxydianiline (3,4′-ODA) in a 2:1 molar ratio, and another new tetraimide-dicarboxylic acid (TIDA) was synthesized by condensation from 4,4′-(hexafluoroisopropylidene)diphthalic anhydride (6FDA), TMA, and 3,4′-ODA in a 1:2:2 molar ratio. Two series of aromatic poly(amide-imide)s (PAI) and were synthesized by Yamazaki phosphorylation polyamidation reactions of DIDA and TIDA, resp., with various aromatic diamines. Due to highly random segmental sequence for both series in the polymer chain and the incorporation of 6FDA moieties for the series, all the polymers were readily soluble in many organic solvents and could be casted into transparent, flexible, and tough films with good mech. properties. Glass-transition temperature (Tgs) of the series and series were recorded in the range of 242-274°C and 264-295°C. In addition, almost all the polymers showed 10% weight loss temperatures higher than 500°C under a nitrogen or an air atm. To complete the study, the researchers used 3-(4-Aminophenoxy)aniline (cas: 2657-87-6) .

3-(4-Aminophenoxy)aniline is one of ethers-buliding-blocks. Ethers lack the hydroxyl groups of alcohols. Without the strongly polarized O―H bond, ether molecules cannot engage in hydrogen bonding with each other. Product Details of 2657-87-6Ethers do have nonbonding electron pairs on their oxygen atoms, however, and they can form hydrogen bonds with other molecules (alcohols, amines, etc.) that have O―H or N―H bonds.

Reference:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem