Preparation and properties of new soluble aromatic polyamides from 2,2′-bis(4-aminophenyl)biphenyl and aromatic dicarboxylic acids
Journal
Journal of Polymer Science, Part A: Polymer Chemistry
Journal Volume
36
Journal Issue
12
Pages
2029-2035
Date Issued
1998
Author(s)
Abstract
New biphenyl-2,2′-diyl-containing aromatic polyamides having a crank and twisted noncoplannar structure were synthesized in inherent viscosities of 0.39-1.42 dL/g by the low-temperature solution polycondensation of 2,2′-bis(4-aminophenyl)biphenyl, prepared in four steps starting from 2-aminobiphenyl, with various aromatic dicarboxylic acid chlorides. These polyamides were readily soluble in a variety of solvents including N,N-dimethylacetamide, N-methyl-2-pyrrolidone (NMP), m-cresol, and pyridine. Transparent, pale-yellow, and flexible films could be cast from the NMP solutions of the polyamides. The aromatic polyamides had glass transition temperatures in the range of 284-320°C, and began to lose weight around 400°C, with 10% weight loss being recorded at about 500°C in air. © 1998 John Wiley & Sons, Inc.
Subjects
2,2′-bis(4-aminophenyl)biphenyl; Aromatic polyamides; Solubility; Thermal behavior
Other Subjects
Aromatic polymers; Chlorine compounds; Glass transition; Polycondensation; Solubility; Solvents; Structure (composition); Synthesis (chemical); Temperature; Thermodynamic properties; Viscosity; Aromatic dicarboxylic acid chloride; Noncoplanar structure; Polyamides
Type
journal article