Synthesis and characterization of aromatic polyamides containing S-triazine rings in the main chain

✍ Scribed by A. D. Sagar; M. M. Salunkhe; P. P. Wadgaonkar; B. D. Sarawade; S. S. Mahajan

• Publisher: John Wiley and Sons
• Year: 1997
• Tongue: English
• Weight: 187 KB
• Volume: 35
• Category: Article
• ISSN: 0887-624X
• DOI: 10.1002/(sici)1099-0518(19970430)35:6<1077::aid-pola11>3.0.co;2-3

✦ Synopsis

Ten new aromatic polyamides containing s-triazine rings in the main chain were synthesized by the low temperature interfacial polycondensation technique involving the reactions of each of the two s-triazine containing diacylchlorides, viz., 2,4-bis (4-chlorocarbonylphenoxy)-6-methoxy-s-triazine and 2,4-bis(3-chlorocarbonylphenoxy)-6-methoxy-s-triazine, with five aromatic diamines namely, 4,4 -bis(4-aminophenoxy)diphenyl sulfone, 4,4 -bis(3-aminophenoxy)diphenyl sulfone, 2,2-bis[4(4-aminophen o x y) p h e n y l ] p r o p a n e, 1,4 b i s (4 -a mi n o -p h e n o x y) b e n z e n e, a n d 1,3 -b i s (4-aminophenoxy)benzene. The resulting polyamides were characterized by viscosity measurements, IR and 1 H-NMR spectroscopy, solubility tests, x-ray diffraction, and thermogravimetry. The polyamides had inherent viscosities in the range of 0.16-1.06 dL/g in N,N-dimethylacetamide at 30ЊC. Most of the s-triazine containing polyamides dissolved readily at room temperature in polar solvents. Except for the polyamide PA-2, the polyamides did not lose weight below 350ЊC under a nitrogen atmosphere. ᭧ 1997