Synthesis and properties of aromatic polyamides of 2,3‐bis(4‐aminophenoxy)naphthalene

Abstract

A new polymer-forming diamine, 2,3-bis(4-aminophenoxy)naphthalene, was synthesized in two steps from the condensation of 2,3-naphthalenediol and p-chloronitrobenzene, giving 2,3-bis(4-nitrophenoxy)naphthalene, followed by the reduction with hydrazine/Pd-C system. A series of novel aromatic polyamides (aramids) were synthesized by direct polycondensation of the diamine with various aromatic dicarboxylic acids in N-methyl-2-pyrrolidone (NMP) using triphenyl phosphite and pyridine as condensing agents. These aramids have inherent viscosities of 0,70-1,48 dL/g and were obtained in quantitative yield. The polymers are generally soluble in a wide range of solvents, such as N,N-dimethylacetamide, NMP, dimethyl sulfoxide, pyridine, and tetrahydrofuran, and afford transparent, flexible, and tough films upon casting from their solutions. The glass transition temperatures of these aramids are in the range of 242-267 "C, and the 10% weight loss temperatures are above 503 "C in nitrogen and above 496 "C in air. 0 1993, Hiithig & Wepf Verlag, Base1 CCC 0025-1 16)3/93/$05.00

Synthesis and Characterization of Poly(amide-imide)s Based on 1,7-Bis(4-aminophenoxy)naphthalene and Various Bis(trimellitimide)s

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Synthesis and properties of aromatic polyamides containing the cyclohexane structure

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Fabrication and electrochemical characterization of polyimide‐derived carbon nanofibers for self‐standing supercapacitor electrode materials

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