Ozawa, Hiroki et al. published new experimental results with the assistance of 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. Recommanded Product: 3-(4-Aminophenoxy)anilineEthers 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.

Ozawa, Hiroki;Ishiguro, Eriko;Kyoya, Yuri;Kikuchi, Yasuaki;Matsumoto, Toshihiko published 《Colorless Polyimides Derived from an Alicyclic Tetracarboxylic Dianhydride, CpODA》. The research results were published in《Polymers (Basel, Switzerland)》 in 2021.Recommanded Product: 3-(4-Aminophenoxy)aniline The article conveys some information:

An alicyclic tetracarboxylic dianhydride having cyclopentanone bis-spironorbornane structure (CpODA) was polycondensated with aromatic dianhydrides to form the corresponding poly(amic acid)s which possessed logarithmic viscosities in the range 1.47-0.54 dL/g. The poly(amic acid) was imidized by three methods: a chem., a thermal, and a combined chem. and thermal process. In a thermal method, imidization temperature markedly influenced the film quality and mol. weight of the polyimide. When the poly(amic acid) was cured over the Tg of the corresponding polyimide, the flexible polyimide films were obtained and the mol. weights increased several times, which means that the post-polymerization took place. In spite of low-temperature cure below Tg flexible films with the imidization ratio of 100% were fabricated by a combined chem. and thermal imidization technique. The films possessed the decomposition temperatures in a range of 475-501°C and Tgs over 330°C. The high Tg results from a dipole-dipole interaction between the keto groups of the polymer chains as well as development of the rigid polyalicyclic unit. The polyimide films exhibited CTE between 17 and 57 ppm/K. All the films fabricated were entirely colorless and possessed the λcut-offs shorter than 337 nm. Notably, the films prepared by a chem. method exhibited outstanding optical properties. And 3-(4-Aminophenoxy)aniline (cas: 2657-87-6) was used in the research process.

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. Recommanded Product: 3-(4-Aminophenoxy)anilineEthers 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