Kinetics of the Thermal Degradation of Poly(lactic acid) and Polyamide Bioblends
dc.contributor.author
dc.date.accessioned
2021-11-23T11:26:55Z
dc.date.available
2021-11-23T11:26:55Z
dc.date.issued
2021-11-19
dc.identifier.uri
dc.description.abstract
Poly(lactic acid) (PLA) and biosourced polyamide (PA) bioblends, with a variable PA weight content of 10–50%, were prepared by melt blending in order to overcome the high brittleness of PLA. During processing, the properties of the melt were stabilized and enhanced by the addition of a styrene-acrylic multi-functional-epoxide oligomeric reactive agent (SAmfE). The general analytical equation (GAE) was used to evaluate the kinetic parameters of the thermal degradation of PLA within bioblends. Various empirical and theoretical solid-state mechanisms were tested to find the best kinetic model. In order to study the effect of PA on the PLA matrix, only the first stage of the thermal degradation was taken into consideration in the kinetic analysis (α < 0.4). On the other hand, standardized conversion functions were evaluated. Given that it is not easy to visualize the best accordance between experimental and theoretical values of standardized conversion functions, an index, based on the integral mean error, was evaluated to quantitatively support our findings relative to the best reaction mechanism. It was demonstrated that the most probable mechanism for the thermal degradation of PLA is the random scission of macromolecular chains. Moreover, y(α) master plots, which are independent of activation energy values, were used to confirm that the selected reaction mechanism was the most adequate. Activation energy values were calculated as a function of PA content. Moreover, the onset thermal stability of PLA was also determined
dc.description.sponsorship
This research was funded by the Ministry of Science and Innovation of the Spanish Government, grant number PID2019-106518RB-I00
dc.format.mimetype
application/pdf
dc.language.iso
eng
dc.publisher
MDPI (Multidisciplinary Digital Publishing Institute)
dc.relation.isformatof
Reproducció digital del document publicat a: https://doi.org/10.3390/polym13223996
dc.relation.ispartof
Polymers, 2021, vol. 13, núm. 22, p. 3996
dc.relation.ispartofseries
Articles publicats (D-EQATA)
dc.rights
Attribution 4.0 International
dc.rights.uri
dc.subject
dc.title
Kinetics of the Thermal Degradation of Poly(lactic acid) and Polyamide Bioblends
dc.type
info:eu-repo/semantics/article
dc.rights.accessRights
info:eu-repo/semantics/openAccess
dc.type.version
info:eu-repo/semantics/publishedVersion
dc.identifier.doi
dc.type.peerreviewed
peer-reviewed
dc.identifier.eissn
2073-4360