New aliphatic-aromatic and fully aromatic phosphonate polyamides were prepared by polycondensation reaction of our synthesized aromatic diamine: tetraethyl[(2,5-diamino-3,6-dimethylbenzene-1,4-diyl)dimethanediyl]bis(p hos phonate) with the specific di-acylchloride (adipoyl chloride, isophthaloyl chloride and terephthaloyl chloride). The chemical structure of all samples were characterized by (H-1 and P-31) NMR, MALDI-TOF MS, FT-IR tools, whereas their thermal properties were determined by DSC and TGA techniques. The phosponate polyadipamide (referred as PAP) is a semi-crystal line sample with a melting temperature at about 261 degrees C and glass transition (T-g) of 71 degrees C. All polymers show two thermal degradation steps in the temperature range 270-550 degrees C. Each polymer, independently its structure, shows the first maximum rate of thermal decomposition temperature (PDT) around 300-310 degrees C, which may be due to thermal degradation of phoshonate groups. MALDI-TOF spectra, beside the linear oligomers terminated with the specific groups expected in accord to the synthesis procedure. reveals the presence of cyclic oligomers in the polyadipamide and polyisophthalamide samples. (c) 2008 Elsevier Ltd. All rights reserved.
New aliphatic-aromatic and fully aromatic phosphonate polyamides were prepared by polycondensation reaction of our synthesized aromatic diamine: tetraethyl[(2,5-diamino-3,6-dimethylbenzene-1,4-diyl)dimethanediyl]bis(p hos phonate) with the specific di-acylchloride (adipoyl chloride, isophthaloyl chloride and terephthaloyl chloride). The chemical structure of all samples were characterized by (H-1 and P-31) NMR, MALDI-TOF MS, FT-IR tools, whereas their thermal properties were determined by DSC and TGA techniques. The phosponate polyadipamide (referred as PAP) is a semi-crystal line sample with a melting temperature at about 261 degrees C and glass transition (T-g) of 71 degrees C. All polymers show two thermal degradation steps in the temperature range 270-550 degrees C. Each polymer, independently its structure, shows the first maximum rate of thermal decomposition temperature (PDT) around 300-310 degrees C, which may be due to thermal degradation of phoshonate groups. MALDI-TOF spectra, beside the linear oligomers terminated with the specific groups expected in accord to the synthesis procedure. reveals the presence of cyclic oligomers in the polyadipamide and polyisophthalamide samples. (c) 2008 Elsevier Ltd. All rights reserved.
Synthesis and characterization of novel polyamides from new aromatic phosphonate diamine monomer
CONSIGLIO, GIUSEPPE;FAILLA, Salvatore;
2008-01-01
Abstract
New aliphatic-aromatic and fully aromatic phosphonate polyamides were prepared by polycondensation reaction of our synthesized aromatic diamine: tetraethyl[(2,5-diamino-3,6-dimethylbenzene-1,4-diyl)dimethanediyl]bis(p hos phonate) with the specific di-acylchloride (adipoyl chloride, isophthaloyl chloride and terephthaloyl chloride). The chemical structure of all samples were characterized by (H-1 and P-31) NMR, MALDI-TOF MS, FT-IR tools, whereas their thermal properties were determined by DSC and TGA techniques. The phosponate polyadipamide (referred as PAP) is a semi-crystal line sample with a melting temperature at about 261 degrees C and glass transition (T-g) of 71 degrees C. All polymers show two thermal degradation steps in the temperature range 270-550 degrees C. Each polymer, independently its structure, shows the first maximum rate of thermal decomposition temperature (PDT) around 300-310 degrees C, which may be due to thermal degradation of phoshonate groups. MALDI-TOF spectra, beside the linear oligomers terminated with the specific groups expected in accord to the synthesis procedure. reveals the presence of cyclic oligomers in the polyadipamide and polyisophthalamide samples. (c) 2008 Elsevier Ltd. All rights reserved.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
