NEW COPOLYAMIDES CONTAINING AZOBENZENE GROUPS AND DIFFERENT DIACID AND DIAMINE IN THE MAIN CHAIN: SYNTHESIS AND CHARACTERIZATION
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 m...
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| Autores principales: | , , |
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| Lenguaje: | English |
| Publicado: |
Sociedad Chilena de Química
2010
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| Materias: | |
| Acceso en línea: | http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-97072010000200014 |
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| Sumario: | 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). |
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