The Impact of the Addition of Compatibilizers on Poly (lactic acid) (PLA) Properties after Extrusion Process

Polymers
F A M M GonçalvesArménio C Serra

Abstract

Poly (lactic acid) (PLA), due to its biodegradability, biocompatibility, and renewability, is one of the most promising biobased polymers for replacing some of the petrol-based materials. Low flexibility of PLA is overcome, by blending it with olefin-based polymers, such as polypropylene (PP). However, the use of compatibilizing agents is required to attain final materials with suitable mechanical properties. Such agents, although essential, can affect PLA structure and, consequently, the mechanical properties of the PLA. To the best of our knowledge, this issue was never studied, and the results can contribute to achieving the best formulations of PLA-based blends according to their final applications. The thermal and mechanical properties of the extruded PLA, with three different commercial compatibilizing agents, were evaluated with the purpose of demonstrating how the compatibilizers can introduce structural differences into the PLA chain during the extrusion process. The combination of crystallinity, molecular weight, and the morphology of the samples after extrusion determines the final mechanical properties of PLA. Despite being a fundamental study, it is our aim to contribute to the sustainability of PLA-based industrie...Continue Reading

References

Mar 26, 1999·Journal of Biomaterials Science. Polymer Edition·K J BurgC R Halberstadt
Oct 7, 2004·Macromolecular Bioscience·Rafael AurasSusan Selke
May 10, 2005·Biomacromolecules·Nadia Ljungberg, Bengt Wesslén
Apr 23, 2008·Journal of Biomedical Materials Research. Part a·Rahul M Rasal, Douglas E Hirt
Jan 8, 2010·International Journal of Molecular Sciences·Wentao ZhaiChul B Park
Jul 16, 2010·Bioresource Technology·K Madhavan NampoothiriRojan Pappy John
Dec 16, 2016·Nature·Yunqing ZhuCharlotte K Williams

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Methods Mentioned

BETA
size-exclusion chromatography
differential scanning calorimetry
nuclear magnetic resonance
scanning electron microscopy
size exclusion chromatography

Software Mentioned

MestRenova
Clarity

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