| Títol: | Thermal stability studies on clay nanocomposites prepared from a degradable poly(ester amide) constituted by glycolic acid and 6-aminohexanoic acid |
| Autor: | Morales Gámez, Laura Teresa
Franco García, María Lourdes
Puiggalí Bellalta, Jordi |
| Altres autors/autores: | Universitat Politècnica de Catalunya. Departament d'Enginyeria Química |
| Matèries: | Àrees temàtiques de la UPC::Enginyeria química
Nanocomposites (Materials)
Polymers
Polímers -- Biodegradació
Polímers -- Propietats tèrmiques
Nanotecnologia |
| Tipus de document: | Article |
| Descripció: | An intercalated nanocomposite of the organically modified montmorillonite Cloisite C25A and a degradable
poly(ester amide) based on glycolic acid and 6-aminohexanoic acid units (poly(glc-alt-amh)) was
prepared using a twin-screw co-rotating extruder. The non-isothermal degradation kinetics was investigated
by thermogravimetric analysis (TG and DTG) in the temperature range of 50–600 ◦C at five
heating rates (2, 5, 10, 20 and 40 ◦C/min) and compared with the neat polymer. Significant differences
were found since the nanocomposite showed three degradation steps instead of the two decomposition
processes detected in the pristine sample. The onset mass loss temperature decreased in the
nanocomposite due to the presence of the organo-modifier compound, but the presence of the silicate
layers significantly decreased the degradation rate at the last stages of decomposition. Kinetic analysis
was performed using the Kissinger method and the isoconversional (Kissinger–Akahira–Sunose
and Friedman) methods. The true kinetic triplets (E, A, f(˛)) were determined for the first two
steps of degradation through the Coats–Redfern and the Invariant Kinetic Parameters methods. The
results clearly indicated that the presence of the organo-modified clay modified the mechanisms of
degradation. |
| Altres identificadors i accés: | Morales-Gámez, L.; Franco, M.; Puiggali, J. Thermal stability studies on clay nanocomposites prepared from a degradable poly(ester amide) constituted by glycolic acid and 6-aminohexanoic acid. "Thermochimica acta", Gener 2011, vol. 512, núm. 1-2, p. 142-149.
0040-6031
http://hdl.handle.net/2117/11657 |
| Disponible al dipòsit: | E-prints UPC
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