Thermal degradation, kinetic triplet, multiple extrusions, PLA
 A. A. Mendes, A. Cunha, and C. Bernardo, “Study of the degradation mechanisms of polyethylene during reprocessing”, Polym Degrad Stab., vol. 96, pp. 1125-1133, 2011.
 K. Jitendra, K. Pondey, A. Ragunata, K. Prep, and R. Sing, “An overview on the degradability of polymer nanocomposites”, Polym Degrad Stabil., vol. 88, pp. 234-250, 2005.
 M. Jakic, N. Stipanelov, and I. Klari, “Thermal degradation of poly(vinyl chloride)/poly(ethylene oxide) blends: Thermogravimetric analysis”, Polym Degrad Stab., vol. 98, pp. 1738-1743, 2013.
 P. Wilichowski, “Comparison of effect of smooth and grooved feed extrusion on HDPE recyclability”, M. Sc. Thesis, Univ. Winsconsin, Madison, USA, 2004.
 J. Pérez, J. Vilas, J. Laza, S. Arnáiz, F. Milangos, E. Bilbao et al., “Effect of reprocessing and accelerated ageing on thermal and mechanical polycarbonate properties”, J Mater Proces Technol., vol. 210, pp. 727-733, 2010.
 R. Valapa, G. Pugazhenthi, and V. Katiyar, “Thermal degradation kinetics of sucrose palmitate reinforced poly(lactic acid) biocomposites”, Int J Biolog Macromol., vol. 65, pp. 275-283, 2014.
 W. Grellmann and S. Seidler, Polymer Testing. Munich: Editorial Hanser, 2007.
 F. Carrasco, P. Pages, J. Gámez-Pérez, O. O. Santana, and M. Maspoch, “Processing of poly(lactic acid): characterization of chemical structure, thermal stability and mechanical properties”, Polym Degrad Stab., vol. 95, pp. 116-125, 2010.
 D. S. Achilias, E. Panayotidou, and I. Zuburtikudis, “Thermal degradation kinetics and isoconversional analysis of biodegradable poly(3-hydroxybutyrate)/organomodified montmorillonite nanocomposites”, Thermochim Acta, vol. 514, pp. 58-66, 2011.
 Z. Ma, D. Chen, J. Gu, B. Bao, and Q. Zhang, “Determination of pyrolysis characteristics and kinetics of palm kernel shell using TGA-FTIR and model-free integral methods”, Energ Convers Manag., vol. 89, pp. 251-259, 2015.
 J. Tochacek and J. Jancar, “Processing degradation index (PDI). A quantitative measure of processing stability of polypropylene”, Polym Test., vol. 31, pp. 1115-1120, 2012.
 J. W. Park, S. C. Oh, H. P. Lee, H. T. Kim, and K. O. Yoo, “Kinetic analysis of termal decomposition of polymer using a dynamic model”, Korean J Chem. Eng., vol. 17, pp. 489-496, 2000.
 H. Kim and S. Oh, “Kinetics of thermal degradation of waste polypropylene and highdensity polyethylene”, J Indust Engin Chem., vol. 11, núm. 5, pp. 648-656, 2005.
 S. Mallakpour and M. Taghavi, “The accuracy of approximation equations in the study of thermal decomposition behavior of some systhesized optically active polyamides”, Iranian Polym J., vol. 18, núm. 11, pp. 857-872, 2009.
 A. Aboulkas, K. El Harfi, and A. El Bouadili, “Thermal degradation behaviors of polyethylene and polupropylene. Part I: Pyrolysis”, Energy Conv. Manag., vol. 51, pp. 1363-1369, 2010.
 W. B. Wan, F. N. Ani, and H. H. Masjuki, “Thermal stability evaluation of palm oil as energy transport media”, Energy Conv Manag., vol. 46, pp. 2198-2215, 2005.
 W. Kim, S. Kim, S. Lee, and I. Hong, “Kinetic characterization of thermal degradation process for commercial rubbers”, J Ind Engin Chem., vol. 6, pp. 348-355. 2000.
 J. C. Santos, I. M. Dos Santos, A. G. Desousa, S. Prasad, and A. V. Dos Santos, “Thermal stability and kinetic study on thermal decomposition of commercial edible oils by thermogravimetry”, J Food Sci., vol. 67, núm. 4, pp. 1393-1398, 2006.
 J. Badia, L. Santonja, A. Martínez-Felipe, and A. Ribes-Greus, “Reprocessed polyactide: studies of thermo-oxidative decomposition”, Biores Technol., vol. 114, pp. 622-628, 2012.
 F. Carrasco, L. Pérez-Maqueda, P. Sánchez-Jiménez, A. Perejón, O. Santana, and M. Maspoch, “Enhanced general analytical equation for the kinetics of the thermal degradation of poly(lactic acid) driven by random scission”, Polym Test., vol. 32, pp. 937-945, 2013.
 B. M. Roduit, “Computational aspects of kinetic analysis: Part E: The ICTAC Kinetics Project-numerical techniques and kinetics of solid state processes”, Thermoch Acta, vol. 355, pp. 171-180, 2000.
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