MIQUELARD, Guillaume; GUINAULT, Alain; SOLLOGOUB, Cyrille; GERVAIS, Matthieu

doi:10.3144/expresspolymlett.2018.10

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MIQUELARD, Guillaume
Laboratoire Procédés et Ingénierie en Mécanique et Matériaux [PIMM]
Propriétés et architectures des alliages et mélanges [P2AM]

GUINAULT, Alain
Laboratoire Procédés et Ingénierie en Mécanique et Matériaux [PIMM]
Ingénierie, Procédés, Aliments [GENIAL]
Propriétés et architectures des alliages et mélanges [P2AM]
Centre National de la Recherche Scientifique [CNRS]

SOLLOGOUB, Cyrille
Laboratoire Procédés et Ingénierie en Mécanique et Matériaux [PIMM]
Propriétés et architectures des alliages et mélanges [P2AM]

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Express Polymer Letters. 2018, vol. 12, n° 2, p. 114-125 ·

BME-PT Hungary

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Improving overall properties of poly(lactic acid) (PLA) by blending it with another biobased polymer has been a strong field of research over the last years. In this study we demonstrate the synergetic effect of a small amount (between 0.1 and 1 wt%) of oligomer-like PLA (oLA) on the thermal, mechanical and gas barrier properties of the widely studied PLA-poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV) blends (90–10 wt%). Films of PLA/PHBV/oLA blends were prepared via single-screw extrusion. oLA being miscible with both PLA and PHBV, its compatibilizing effect was demon- strated by a decrease of the interfacial tension, a slight shift in the Tgs of both polymers, and an increase in the elongation at break. It was also showed that oLA had a plasticizing effect on the PHBV dispersed phase, increasing its crystallinity rate. This resulted in a decrease in the permeability of the films while improving Young’s modulus.< Leer menos

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polymer blends and alloys

biopolymers

toughening

barrier properties

compatibilization

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Combined compatibilization and plasticization effect of low molecular weight poly(Lactic acid) in poly(lactic acid)/poly(3-hydroxybutyrate-co-3-hydroxyvalerate) blends

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