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Determination of Thermodynamic Parameters of Polylactic Acid by Thermogravimetry under Pyrolysis Conditions

  • Dades identificatives

    Identificador: imarina:9230958
  • Autors:

    Palmay, Paul
    Mora, Melissa
    Barzallo, Diego
    Bruno, Joan Carles
  • Altres:

    Autor segons l'article: Palmay, Paul; Mora, Melissa; Barzallo, Diego; Bruno, Joan Carles
    Departament: Enginyeria Mecànica
    Autor/s de la URV: Bruno Argilaguet, Juan Carlos
    Paraules clau: Thermodynamic parameters Thermal-degradation kinetics Polylactic acid Kinetic triplet Degradation temperature polylactic acid plastics kinetic triplet degradation temperature decomposition
    Resum: In the present study, the thermodynamic parameters of Polylactic Acid (PLA) under conditions of thermal degradation were determined. The PLA material, previously sampled and characterized, was analyzed by dynamic thermogravimetry (TG) at heating rates of 5, 10 and 15 °C min?1 with a nitrogen flow of 20 mL min?1 from a temperature of 25 to 900 °C. The data were treated using isoconversional kinetic models to obtain the activation energy and the pre-exponential factor of each model. To fit the DTG curves, the Arrhenius equation was used applying the Contraction Sphere reaction model: two-dimensional phase limit reaction (R2). The thermodynamic parameters such as enthalpy, Gibbs free energy and entropy were determined from the kinetic parameters of suitable models for each heating rate after statistical validation and comparison with other studies. The results showed that as the heating rate increases, the degradation temperature also increases, while the activation energy, enthalpy and pre-exponential factor decrease. According to the value of ?G (171.65 kJ mol?1), PLA has a significant potential to be used as a raw material to produce bioenergy/biofuels by pyrolysis.
    Àrees temàtiques: Química Process chemistry and technology Physics, applied Materials science, multidisciplinary Materials science (miscellaneous) Materials science (all) Materiais Instrumentation General materials science General engineering Fluid flow and transfer processes Engineering, multidisciplinary Engineering (miscellaneous) Engineering (all) Engenharias ii Engenharias i Computer science applications Ciências biológicas iii Ciências biológicas ii Ciências biológicas i Ciências agrárias i Ciência de alimentos Chemistry, multidisciplinary Biodiversidade Astronomia / física
    Accès a la llicència d'ús: https://creativecommons.org/licenses/by/3.0/es/
    Adreça de correu electrònic de l'autor: juancarlos.bruno@urv.cat
    Identificador de l'autor: 0000-0001-7448-5416
    Data d'alta del registre: 2024-07-27
    Versió de l'article dipositat: info:eu-repo/semantics/publishedVersion
    Enllaç font original: https://www.mdpi.com/2076-3417/11/21/10192
    URL Document de llicència: https://repositori.urv.cat/ca/proteccio-de-dades/
    Referència a l'article segons font original: Applied Sciences-Basel. 11 (21): 10192-
    Referència de l'ítem segons les normes APA: Palmay, Paul; Mora, Melissa; Barzallo, Diego; Bruno, Joan Carles (2021). Determination of Thermodynamic Parameters of Polylactic Acid by Thermogravimetry under Pyrolysis Conditions. Applied Sciences-Basel, 11(21), 10192-. DOI: 10.3390/app112110192
    DOI de l'article: 10.3390/app112110192
    Entitat: Universitat Rovira i Virgili
    Any de publicació de la revista: 2021
    Tipus de publicació: Journal Publications
  • Paraules clau:

    Chemistry, Multidisciplinary,Computer Science Applications,Engineering (Miscellaneous),Engineering, Multidisciplinary,Fluid Flow and Transfer Processes,Instrumentation,Materials Science (Miscellaneous),Materials Science, Multidisciplinary,Physics, Applied,Process Chemistry and Technology
    Thermodynamic parameters
    Thermal-degradation kinetics
    Polylactic acid
    Kinetic triplet
    Degradation temperature
    polylactic acid
    plastics
    kinetic triplet
    degradation temperature
    decomposition
    Química
    Process chemistry and technology
    Physics, applied
    Materials science, multidisciplinary
    Materials science (miscellaneous)
    Materials science (all)
    Materiais
    Instrumentation
    General materials science
    General engineering
    Fluid flow and transfer processes
    Engineering, multidisciplinary
    Engineering (miscellaneous)
    Engineering (all)
    Engenharias ii
    Engenharias i
    Computer science applications
    Ciências biológicas iii
    Ciências biológicas ii
    Ciências biológicas i
    Ciências agrárias i
    Ciência de alimentos
    Chemistry, multidisciplinary
    Biodiversidade
    Astronomia / física
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