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Materials 2018, 11(1), 148; https://doi.org/10.3390/ma11010148

Poly(lactic acid) (PLA) Based Tear Resistant and Biodegradable Flexible Films by Blown Film Extrusion

1
Department of Civil and Industrial Engineering, University of Pisa, Via Diotisalvi 2, 56122 Pisa, Italy
2
Department of Chemical Engineering, Can Tho University, 3/2 Street, Can Tho 90000, Vietnam
3
National Research Council, Institute of Chemical Physical Processes, Via Moruzzi 1, 56124 Pisa, Italy
*
Author to whom correspondence should be addressed.
Received: 18 October 2017 / Revised: 25 December 2017 / Accepted: 9 January 2018 / Published: 17 January 2018
(This article belongs to the Section Biomaterials)
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Abstract

Poly(lactic acid) (PLA) was melt mixed in a laboratory extruder with poly(butylene adipate-co-terephthalate) (PBAT) and poly(butylene succinate) (PBS) in the presence of polypropylene glycol di glycidyl ether (EJ400) that acted as both plasticizer and compatibilizer. The process was then scaled up in a semi-industrial extruder preparing pellets having different content of a nucleating agent (LAK). All of the formulations could be processed by blowing extrusion and the obtained films showed mechanical properties dependent on the LAK content. In particular the tearing strength showed a maximum like trend in the investigated composition range. The films prepared with both kinds of blends showed a tensile strength in the range 12–24 MPa, an elongation at break in the range 150–260% and a significant crystallinity. View Full-Text
Keywords: biodegradable polymer blends; mechanical properties; blown film extrusion; plasticizer; nucleating agent biodegradable polymer blends; mechanical properties; blown film extrusion; plasticizer; nucleating agent
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Mallegni, N.; Phuong, T.V.; Coltelli, M.-B.; Cinelli, P.; Lazzeri, A. Poly(lactic acid) (PLA) Based Tear Resistant and Biodegradable Flexible Films by Blown Film Extrusion. Materials 2018, 11, 148.

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