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Suitability of Blends from Virgin and Reprocessed Polylactide: Performance and Energy Valorization Kinetics

O. Gil-Castell1, J. D. Badia1,2, A. Ribes-Greus1,*
Instituto de Tecnología de Materiales (ITM), Universitat Politècnica de València, Camino de Vera s/n, 46022 València, Spain
Departament d’Enginyeria Química, Escola Tècnica Superior d’Enginyeria, Universitat de València, Av. de la Universitat s/n, 46100 Burjassot, Spain
*Corresponding author:

Journal of Renewable Materials 2018, 6(4), 370-382.


A blending strategy of virgin and reprocessed polylactide may be postulated as an alternative to reduce the material cost at industrial level, and as a valorization route to plastic waste management of production scraps. The performance of blends prepared from virgin polylactide and polylactide mechanically reprocessed up to two cycles (PLA-V/R) was assessed in terms of thermo-oxidative stability, morphology, viscoelasticity and thermal kinetics for energetic valorization. PLA-V/R blends showed appropriate thermo-oxidative stability. The amorphous nature of polylactide was preserved after blending. The viscoelastic properties showed an increment of the mechanical blend effectiveness, which suggested the feasibility of using PLA-V/R blends under similar mechanical conditions to those of virgin PLA goods. Finally, it was shown that the energetic valorization of PLA-V/R blends would result in a more feasible process, due to the lower required activation energy, thus highlighting the advantages of the energetic demand for the process. In conclusion, PLA-V/R blends showed similar processability, service performance and valorization routes as virgin PLA and therefore could be relevant in the sustainable circular industry of bioplastics.


Polylactide (PLA), mechanical recycling, reprocessing, energetic valorisation, thermal analysis

Cite This Article

Gil-Castell, O., Badia, J. D., Ribes-Greus, A. (2018). Suitability of Blends from Virgin and Reprocessed Polylactide: Performance and Energy Valorization Kinetics. Journal of Renewable Materials, 6(4), 370–382.

This work is licensed under a Creative Commons Attribution 4.0 International License , which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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