Application of cas: 2657-87-6 | Wang, Wei et al. published an article in 2014

3-(4-Aminophenoxy)aniline is one of ethers-buliding-blocks. Ethers feature bent C–O–C linkages. In dimethyl ether, the bond angle is 111° and C–O distances are 141 pm. The barrier to rotation about the C–O bonds is low. Related Products of 2657-87-6 The bonding of oxygen in ethers, alcohols, and water is similar. In the language of valence bond theory, the hybridization at oxygen is sp3.

Wang, Wei;Wang, Zijun;Zhang, Li;Liu, Yuntao;Chen, Dongfeng published 《Effect of isomeric oxydianiline on crystalline behavior and properties of semicrystalline copolyimides》 in 2014. The article was appeared in 《Gaofenzi Cailiao Kexue Yu Gongcheng》. They have made some progress in their research.Related Products of 2657-87-6 The article mentions the following:

To investigate the effect of isomer on crystallinities of copolyimides, two copolyimides were synthesized by introducing 4,4′-oxydianiline (4,4′-ODA) or 3,4′-oxydianiline (3,4′-ODA) to 3,3′,4,4′-biphenyltetracarboxylic dianhydride (s-BPDA)/1,3-bis (4-aminophenoxy) benzene (TPER). And the mole ratio of ODA and TPER is both 1:9. The homopolyimide based on s-BPDA/TPER/phthalic anhydride (PA) was also prepared and it was abbreviated as TPER PI. Copolyimide containing 4,4′-ODA or 3,4′-ODA was abbreviated as PI a and PI b, resp. TGA, DSC, DMA and WXRD were used to study the crystalline behaviors and properties of the polymers. Three polymers display different cold crystallization temperatures and melting temperatures after being quenched from melts by DSC and they also display different melting behaviors after being slowly cooled from melts. Since 3,4′-ODA has more twisted structure, PI b displays the lowest melting temperature (Tm), the lowest crystallization rate, and the lowest storage modulus above Tg. After being isothermally crystallized at different temperatures for 1 h, PI a displays a triple-melting behaviors as same as TPER PI, however, PI b displays a duple-melting behaviors. Positions of some diffraction peaks of PI b were found to be changed after being isothermally crystallized at different temperatures In a word, introduction of 4,4′-ODA and 3,4′-ODA greatly affects crystalline behaviors of the copolyimides.3-(4-Aminophenoxy)aniline (cas: 2657-87-6) were involved in the experimental procedure.

3-(4-Aminophenoxy)aniline is one of ethers-buliding-blocks. Ethers feature bent C–O–C linkages. In dimethyl ether, the bond angle is 111° and C–O distances are 141 pm. The barrier to rotation about the C–O bonds is low. Related Products of 2657-87-6 The bonding of oxygen in ethers, alcohols, and water is similar. In the language of valence bond theory, the hybridization at oxygen is sp3.

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