New copolyamides containing azobenzene groups and different diacid and diamine in the main chain: Synthesis and characterization
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[1] Islamic Azad University
Islamic Azad University
Irán
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- Localización: Journal of the Chilean Chemical Society (Boletín de la Sociedad Chilena de Química), ISSN-e 0717-6309, ISSN 0366-1644, Vol. 55, Nº. 2, 2010, págs. 212-214
- Idioma: inglés
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Resumen
A new series of copolyamides CoPAs 7a-f were synthesized through the direct polycondensation reaction of 4,4'-azobenzenedicarboxylic acid 1 with 1,5-naphthalenediamine 2, 3,4-diaminobenzophenone 3 in the presence of adipic acid 4, fumaric acid 5 and terephthalic acid 6 as a second diacid in a medium consisting of N-methyl-2-pyrrolidone, triphenyl phosphate (TPP), calcium chloride and pyridine. The obtained polymers were characterized by means of FT-IR spectroscopy, elemental analyses and inherent viscosity. These CoPAs were highly soluble in polar aprotic solvents such as N,N-dimethylacetamide (DMAc), N,N-dimethylformamide (DMF), dimethyl sulfoxide (DMSO), W-methyl-2-pyrrolidone (NMP) and other solvents such as sulfuric acid. Thermal properties of the CoPAs 7 c, 7d and 7e were investigated using thermal gravimetric analysis (TGA and DTG).
