Muestra métricas de impacto externas asociadas a la publicación. Para mayor detalle:
| Indexado |
|
||||
| DOI | 10.1007/S00289-016-1714-3 | ||||
| Año | 2017 | ||||
| Tipo | artículo de investigación |
Citas Totales
Autores Afiliación Chile
Instituciones Chile
% Participación
Internacional
Autores
Afiliación Extranjera
Instituciones
Extranjeras
New halogenated silicon-containing poly(amides) (PAs) derived from diacids and an aromatic diamine containing an Si atom were obtained according to the Yamazaki procedure. The diacids contain a preformed halogenated imide ring, another amide group and an aminoacidic residue. The diacids and the PAs were characterized by IR and H-1, C-13 and Si-29 NMR spectroscopy, elemental analysis and, when corresponding, optical rotation. For those PAs containing F atoms in the imide ring, we also observed the signals corresponding to the coupling of the C-F atoms in the C-13 MNR spectra. The results are in agreement with the proposed structures. Also, PAs without amino acid residues were synthesized according to the same procedure. PAs were soluble in aprotic polar solvents and some of them in m-cresol and THF, due to the inclusion in the structure of meta-substitution aromatic rings, flexible aminoacidic residue and polar C-Si bonds. The eta (inh) values were low, indicating the presence of oligomeric species of low molecular weight. The T (g) values did not show a clear tendency about the influence of the nature of the amino acid residue, but when the influence of the halogen atoms was analyzed, it was possible to observe a decrease in the T (g) values, due to the higher chain separation, and consequently the lower interactions between them. The thermal decomposition temperatures were determined at 10 % of weight loss, showing in general good values between 300 and 367 A degrees C, and not showing a relationship between the values and the structure of the side groups. The transparency was studied observing moderate values at 400 nm, but showing 80 % of transparency between 500 and 550 nm, which was attributed to the higher aromatic content of these PAs. All PAs showed flame retardancy due to the presence of the halogen atoms.
| Ord. | Autor | Género | Institución - País |
|---|---|---|---|
| 1 | TAGLE-DOMINGUEZ, LUIS HERNAN | Hombre |
Pontificia Universidad Católica de Chile - Chile
|
| 2 | TERRAZA-INOSTROZA, CLAUDIO ALBERTO | Hombre |
Pontificia Universidad Católica de Chile - Chile
|
| 3 | Tundidor-Camba, Alain | Hombre |
Pontificia Universidad Católica de Chile - Chile
|
| 4 | COLL-HERRERA, DEYSMA | - |
Pontificia Universidad Católica de Chile - Chile
|
| Fuente |
|---|
| CONICYT |
| Comisión Nacional de Investigación Científica y Tecnológica |
| Comisión Nacional de Investigación CientÃfica y Tecnológica |
| Fondo Nacional de Investigacion Cientifica y Tecnologica, FONDECYT |
| Fondo Nacional de Desarrollo CientÃfico, Tecnológico y de Innovación Tecnológica |
| Fondo Nacional de Investigaci?? |
| Agradecimiento |
|---|
| Authors acknowledge Fondo Nacional de Investigacion Cientifica y Tecnologica, FONDECYT, through Project 1100015. D.C. acknowledges CONICYT for a Ph.D. fellowship. |
| Authors acknowledge Fondo Nacional de Investigación Científica y Tecnológica, FONDECYT, through Project 1100015. D.C. acknowledges CONICYT for a Ph.D. fellowship. |