Synthesis and characterization of phenylated aromatic poly(amide–amide)s

✍ Scribed by P. H. Basutkar; M. D. Joshi; S. V. Lonikar; N. N. Maldar; B. B. Idage

• Publisher: John Wiley and Sons
• Year: 1998
• Tongue: English
• Weight: 172 KB
• Volume: 68
• Category: Article
• ISSN: 0021-8995
• DOI: 10.1002/(sici)1097-4628(19980531)68:9<1523::aid-app15>3.0.co;2-#

✦ Synopsis

A modified new aromatic diamine 2,5-bis[(4-aminophenyl)4-benzamide]-3,4-diphenyl thiophene ( VI) with preformed amide linkages and pendant phenyl substituents was synthesized, characterized by IR, NMR, mass spectroscopy, and a physical constant. Novel poly(amide-amide)s were synthesized from VI and aromatic diacid chlorides in N,N-dimethylacetamide by a solution polycondensation technique. The polymers were obtained in 98-100% yields and showed reduced viscosities in the range of 0.80-2.68 dL/g. They were readily soluble in aprotic polar solvents. These poly(amide-amide)s showed glass transition temperatures of 277-280ЊC as measured by DSC and showed no weight loss below 412ЊC in a nitrogen atmosphere. The polymers showed moisture regain in the range of 9.52-12.67%.