Microstructural Behaviors of Matrices Based on Polylactic Acid and Polyhydroxyalkanoates

Individual films of polyhydroxyalkanoates (PHA) and polylactic acid (PLA) and their blends were developed by solvent casting. PHA was obtained from activated sludges from a wastewater-treatment system at a laboratory scale. This work focused on analyzing the microstructural properties and thermal be...

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Autores principales: Alzate Marín, Juan Carlos, Rivero, Sandra, Pinotti, Adriana, Caravelli, Alejandro Horacio, Zaritzky, Noemí Elisabet
Formato: Articulo Preprint
Lenguaje:Inglés
Publicado: 2018
Materias:
Bioquímica
Biopolymers
Crystallinity
Infrared spectroscopy
Modulated DSC
Morphology
Polymer blends
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/99331
https://ri.conicet.gov.ar/11336/87647
http://pubs.acs.org/doi/10.1021/acs.jafc.8b01506
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SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-99331
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Bioquímica
Biopolymers
Crystallinity
Infrared spectroscopy
Modulated DSC
Morphology
Polymer blends
spellingShingle Bioquímica
Biopolymers
Crystallinity
Infrared spectroscopy
Modulated DSC
Morphology
Polymer blends
Alzate Marín, Juan Carlos
Rivero, Sandra
Pinotti, Adriana
Caravelli, Alejandro Horacio
Zaritzky, Noemí Elisabet
Microstructural Behaviors of Matrices Based on Polylactic Acid and Polyhydroxyalkanoates
topic_facet Bioquímica
Biopolymers
Crystallinity
Infrared spectroscopy
Modulated DSC
Morphology
Polymer blends
description Individual films of polyhydroxyalkanoates (PHA) and polylactic acid (PLA) and their blends were developed by solvent casting. PHA was obtained from activated sludges from a wastewater-treatment system at a laboratory scale. This work focused on analyzing the microstructural properties and thermal behaviors of individual films of PHA and PLA as well as those of their blends. The behaviors of the biodegradation processes of the individual films and blends were examined from a microstructural point of view. ATR-FTIR spectra indicated the existence of weak molecular interactions between the polymers. The formulation of blend films improved the crystallinity of PLA; additionally, it induced the polymer-recrystallization phenomenon, because crystallized PHA acted as a PLA-nucleating agent. This phenomenon explains the improvements in the films´ water-vapor-barrier properties. The blends exposed to a biodegradation process showed an intermediate behavior between PLA and PHA, leading to a consistent basis for designing systems tailored to a particular purpose.
format Articulo
Preprint
author Alzate Marín, Juan Carlos
Rivero, Sandra
Pinotti, Adriana
Caravelli, Alejandro Horacio
Zaritzky, Noemí Elisabet
author_facet Alzate Marín, Juan Carlos
Rivero, Sandra
Pinotti, Adriana
Caravelli, Alejandro Horacio
Zaritzky, Noemí Elisabet
author_sort Alzate Marín, Juan Carlos
title Microstructural Behaviors of Matrices Based on Polylactic Acid and Polyhydroxyalkanoates
title_short Microstructural Behaviors of Matrices Based on Polylactic Acid and Polyhydroxyalkanoates
title_full Microstructural Behaviors of Matrices Based on Polylactic Acid and Polyhydroxyalkanoates
title_fullStr Microstructural Behaviors of Matrices Based on Polylactic Acid and Polyhydroxyalkanoates
title_full_unstemmed Microstructural Behaviors of Matrices Based on Polylactic Acid and Polyhydroxyalkanoates
title_sort microstructural behaviors of matrices based on polylactic acid and polyhydroxyalkanoates
publishDate 2018
url http://sedici.unlp.edu.ar/handle/10915/99331
https://ri.conicet.gov.ar/11336/87647
http://pubs.acs.org/doi/10.1021/acs.jafc.8b01506
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