Biodegradable Bioblends: A Study of Fabrication and Life Cycle Assessment of Blended Biopolymers as Sustainable Material for Packaging Applications




Hedrick, Mary "Mal"

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University of Guelph


A biodegradable ternary blend fabricated from polylactic acid (PLA), poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV) and polypropylene carbonate (PPC) with a good balance of stiffness and toughness via optimizing composition ratio and morphology is provided in our work. 20% PLA, 40% PHBV and 40% PPC obtained tensile strength at 44 MPa with an elongation at break of 215%. Thermal performance showed an HDT value of 72°C. The Harkins equation predicted that the three immiscible polymers formed a complete wetting morphology. Initial impact assessment revealed that 1:1 PLA-PPC binary blend produced at lab scale had emissions for all impact categories that resulted from the effects of materials PLA and using synthetic based PPC. This LCA study provided an initial baseline for these biodegradable materials.



PHBV, PLA, PPC, biopolymer blend, biodegradable, ternary blend, food packaging


Hedrick, M.M., Wu, F., Mohanty, A.K., Misra, M. (2020). Morphology and performance relationship studies on biodegradable ternary blends of poly(3-hydroxybutyrate-co-3-hydroxyvalerate), polylactic acid, and polypropylene carbonate. RSC Advances, 1(73), 44624�??44632.