Poly (lactic acid) blends: Processing, properties and applications

Mohammadreza Nofar*, Dilara Sacligil, Pierre J. Carreau, Musa R. Kamal, Marie Claude Heuzey

*Corresponding author for this work

Research output: Contribution to journalReview articlepeer-review

513 Citations (Scopus)

Abstract

Poly (lactic acid) or polylactide (PLA) is a commercial biobased, biodegradable, biocompatible, compostable and non-toxic polymer that has competitive material and processing costs and desirable mechanical properties. Thereby, it can be considered favorably for biomedical applications and as the most promising substitute for petroleum-based polymers in a wide range of commodity and engineering applications. However, PLA has some significant shortcomings such as low melt strength, slow crystallization rate, poor processability, high brittleness, low toughness, and low service temperature, which limit its applications. To overcome these limitations, blending PLA with other polymers is an inexpensive approach that could also tailor the final properties of PLA-based products. During the last two decades, researchers investigated the synthesis, processing, properties, and development of various PLA-based blend systems including miscible blends of poly L-lactide (PLLA) and poly D-lactide (PDLA), which generate stereocomplex crystals, binary immiscible/miscible blends of PLA with other thermoplastics, multifunctional ternary blends using a third polymer or fillers such as nanoparticles, as well as PLA-based blend foam systems. This article reviews all these investigations and compares the syntheses/processing-morphology-properties interrelationships in PLA-based blends developed so far for various applications.

Original languageEnglish
Pages (from-to)307-360
Number of pages54
JournalInternational Journal of Biological Macromolecules
Volume125
DOIs
Publication statusPublished - 15 Mar 2019

Bibliographical note

Publisher Copyright:
© 2018 Elsevier B.V.

Keywords

  • Binary
  • Blend
  • Composite
  • Foam
  • Multiphase
  • Nanocomposite
  • PLA
  • Poly(lactic acid)
  • Polylactide
  • Review
  • Stereocomplex
  • Ternary

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