Rheological, mechanical, thermal, and morphological properties of blends poly(butylene adipate‐co‐terephthalate), thermoplastic starch, and cellulose nanoparticles

The objective of the present study was the preparation and characterization of poly(butylene adipate‐co‐terephthalate) (PBAT) and thermoplastic starch (TPS) blends reinforced with cellulose nanoparticles (CNCs) by extrusion. The work was conducted in four steps. Initially, the CNCs were prepared fro...

Ausführliche Beschreibung

Gespeichert in:
Bibliographische Detailangaben
Veröffentlicht in:Polymer engineering and science 2020-07, Vol.60 (7), p.1482-1493
Hauptverfasser: Silva, Jania Betania Alves, Bretas, Rosário Elida Suman, Lucas, Alessandra Almeida, Marini, Juliano, Silva, Aline Bruna, Santana, Jamille Santos, Pereira, Fabiano Vargas, Druzian, Janice Izabel
Format: Artikel
Sprache:eng
Schlagworte:
Online-Zugang:Volltext
Tags: Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
Beschreibung
Zusammenfassung:The objective of the present study was the preparation and characterization of poly(butylene adipate‐co‐terephthalate) (PBAT) and thermoplastic starch (TPS) blends reinforced with cellulose nanoparticles (CNCs) by extrusion. The work was conducted in four steps. Initially, the CNCs were prepared from eucalyptus cellulose pulp by acid hydrolysis. The second step was the preparation of the nanocomposite (TPS‐CNC), composed of cassava starch, CNC, glycerol, and citric and stearic acids, by double screw extrusion. The third step was the preparation of PBAT/TPS‐CNC blends in twin‐screw extruders. In the fourth step, the films were produced by flat extrusion. Blends exhibited similar rheological behavior, increasing the CNC concentration in blends increased the viscosity as a function of the shear rate, and altered the behavior of the shear storage (G′) and shear loss (G″) curves as a function of the oscillation frequency (ω). The presence of CNC in blend provided improvements significant in mechanical properties, with 120% increase in Young's modulus, and 46% increase in maximum tensile. Thermal behavior (thermogravimetric analysis and differential scanning calorimetry) was altered with the incorporation of the CNC, showing a single melt peak (Tm) and a slight increase in Tg, indicating good dispersion between the phases of the blends, corroborating with the fracture surface microscopy of films.
ISSN:0032-3888
1548-2634
DOI:10.1002/pen.25395