PMID- 34960930
OWN - NLM
STAT- PubMed-not-MEDLINE
LR  - 20211230
IS  - 2073-4360 (Electronic)
IS  - 2073-4360 (Linking)
VI  - 13
IP  - 24
DP  - 2021 Dec 14
TI  - Determination of the Thermodynamic Parameters of the Pyrolysis Process of 
      Post-Consumption Thermoplastics by Non-Isothermal Thermogravimetric Analysis.
LID - 10.3390/polym13244379 [doi]
LID - 4379
AB  - Currently, the pyrolysis process is an important technology for the final 
      treatment of plastic waste worldwide. For this reason, knowing in detail the 
      chemical process and the thermodynamics that accompany cracking reactions is of 
      utmost importance. The present study aims to determine the thermodynamic 
      parameters of the degradation process of conventional thermoplastics (polystyrene 
      (PS), polyethylene terephthalate (PET), high-density polyethylene (HDPE), 
      polypropylene (PP) and polyvinyl chloride (PVC)) from the study of their chemical 
      kinetics by thermogravimetric analysis (TG). Non-isothermal thermogravimetry was 
      performed at three heating rates from room temperature to 550  degrees C with an inert 
      nitrogen atmosphere with a flow of 20 mL min(-1). Once the TG data is obtained, 
      an analysis is carried out with the isoconversional models of Friedman (FR), 
      Kissinger-Akahira-Sunose (KAS), and Flynn-Wall-Ozawa (FWO) in order to determine 
      the one that best fits the experimental data, and with this, the calculation of 
      the activation energy and the pre-exponential factor is performed. The validation 
      of the model was carried out using the correlation factor, determining that the 
      KAS model is the one that best adjusts for the post-consumer thermoplastic 
      degradation process at the three heating rates. With the use of the kinetic 
      parameters, the variation of the Gibbs free energy is determined in each of the 
      cases, where it is necessary that for structures containing aromatic groups a 
      lower energy is presented, which implies a relative ease of degradation compared 
      to the linear structures.
FAU - Palmay, Paul
AU  - Palmay P
AD  - Facultad de Ciencias, Escuela Superior Politecnica de Chimborazo ESPOCH, 
      Panamericana Sur Km 1 1/2, Riobamba 060155, Ecuador.
AD  - Department of Mechanical Engineering, Universitat Rovira i Virgili, Avda. Paisos 
      Catalans, 26, 43007 Tarragona, Spain.
FAU - Puente, Cesar
AU  - Puente C
AD  - Facultad de Ciencias, Escuela Superior Politecnica de Chimborazo ESPOCH, 
      Panamericana Sur Km 1 1/2, Riobamba 060155, Ecuador.
FAU - Barzallo, Diego
AU  - Barzallo D
AD  - Facultad Ciencias e Ingenieria, Universidad Estatal de Milagro, Milagro 091050, 
      Ecuador.
FAU - Bruno, Joan Carles
AU  - Bruno JC
AUID- ORCID: 0000-0001-7448-5416
AD  - Department of Mechanical Engineering, Universitat Rovira i Virgili, Avda. Paisos 
      Catalans, 26, 43007 Tarragona, Spain.
LA  - eng
PT  - Journal Article
DEP - 20211214
PL  - Switzerland
TA  - Polymers (Basel)
JT  - Polymers
JID - 101545357
PMC - PMC8705733
OTO - NOTNLM
OT  - degradation temperature
OT  - kinetic parameters
OT  - thermodynamic parameters
OT  - thermoplastics
COIS- The authors declare no conflict of interest.
EDAT- 2021/12/29 06:00
MHDA- 2021/12/29 06:01
PMCR- 2021/12/14
CRDT- 2021/12/28 01:08
PHST- 2021/11/27 00:00 [received]
PHST- 2021/12/08 00:00 [revised]
PHST- 2021/12/10 00:00 [accepted]
PHST- 2021/12/28 01:08 [entrez]
PHST- 2021/12/29 06:00 [pubmed]
PHST- 2021/12/29 06:01 [medline]
PHST- 2021/12/14 00:00 [pmc-release]
AID - polym13244379 [pii]
AID - polymers-13-04379 [pii]
AID - 10.3390/polym13244379 [doi]
PST - epublish
SO  - Polymers (Basel). 2021 Dec 14;13(24):4379. doi: 10.3390/polym13244379.