PLA films with improved flexibility properties by using maleinized cottonseed oil

[Display omitted] •Acid number obtained by MCSO was 63mgKOHg−1.•MCSO has been proposed as plasticizer for poly(lactic acid).•Addition of 7.5wt% MCSO increases the elongation at break by 292%.•FESEM has indicated better dispersion of MCSO into the PLA matrix.•DSC revealed a decrease in the glass tran...

Ausführliche Beschreibung

Gespeichert in:
Bibliographische Detailangaben
Veröffentlicht in:European polymer journal 2017-06, Vol.91, p.248-259
Hauptverfasser: Carbonell-Verdu, Alfredo, Garcia-Garcia, Daniel, Dominici, Franco, Torre, Luigi, Sanchez-Nacher, Lourdes, Balart, Rafael
Format: Artikel
Sprache:eng
Schlagworte:
Online-Zugang:Volltext
Tags: Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
Beschreibung
Zusammenfassung:[Display omitted] •Acid number obtained by MCSO was 63mgKOHg−1.•MCSO has been proposed as plasticizer for poly(lactic acid).•Addition of 7.5wt% MCSO increases the elongation at break by 292%.•FESEM has indicated better dispersion of MCSO into the PLA matrix.•DSC revealed a decrease in the glass transition temperature. This work assesses the potential of maleinized cottonseed oil – MCSO as plasticizer in poly(lactic acid) – PLA films with improved ductile behaviour. The effects of MCSO are compared with commercially available maleinized oil, i.e. maleinized linseed oil – MLO in terms of mechanical, thermal and barrier properties, as well as morphology changes. Plasticized PLA formulations were obtained with a maleinized oil content in the 0–10wt% range. Addition of both maleinized vegetable oils leads to a slight decrease in the glass transition temperature (Tg) of neat PLA from 63°C to 60–61°C. Nevertheless, MCSO provides better overall properties. Addition of 7.5wt% MCSO increases the elongation at break by 292%. Regarding the barrier properties, both maleinized vegetable oils increase the oxygen transmission rate – OTR. Nevertheless, this increase is less pronounced in the case of MCSO thus indicating its higher efficiency compared to MLO. On the other hand, addition of both maleinized vegetable oils do not compromise the overall disintegration of the obtained PLA formulations, thus positioning these additives as environmentally friendly solutions to increase ductile properties in PLA-based films.
ISSN:0014-3057
1873-1945
DOI:10.1016/j.eurpolymj.2017.04.013