Published : 2024-08-30

PLA/PBAT blends for blown film extrusion

Abstract

Biodegradable PLA/PBAT polymers blends in different ratio were prepared by extrusion process for blown films produced. The granulates with PBAT content from 10 wt% to 90 wt% in the PLA/PBAT blends were tested. Blends were characterized using thermal methods (DSC, TG) and FTIR spectroscopy. Although both polymers PLA and PBAT are thermodynamically immiscible, it has been shown that up to 50 wt% addition of PBAT to PLA enables obtaining good quality films in a continuous technological process. Among all of the analyzed high flexibility samples, the most optimal are films with a PLA content of 30 or 40 wt% characterized by high strength parameters in the range of 36.7–38.7 MPa, 357–388% and tear strength on 11–22 N/mm, respectively. SEM microscopy was used as an analysis complementing the observation of changes in the mechanical properties of the films by assessing their surface.



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Ostrowska, J., Sadurski, W. ., Paluch, M. ., Dębowski, M. ., Wrona, O., Sołtan, K., & Tyński, P. (2024). PLA/PBAT blends for blown film extrusion. Polimery, 69(7-8), 368-. https://doi.org/10.14314/polimery.2024.7.4