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

Mohammadreza Nofar1, Dilara Sacligil2, Pierre J Carreau3

  • 1Metallurgical & Materials Engineering Department, Faculty of Chemical and Metallurgical Engineering, Istanbul Technical University, Maslak, Istanbul 34469, Turkey; Polymer Science and Technology Program, Istanbul Technical University, Maslak, Istanbul 34469, Turkey.

International Journal of Biological Macromolecules
|December 12, 2018
PubMed
Summary
This summary is machine-generated.

Poly (lactic acid) (PLA) is a versatile biopolymer with limitations. Blending PLA with other polymers enhances its properties, expanding its applications in various fields.

Keywords:
BinaryBlendCompositeFoamMultiphaseNanocompositePLAPoly(lactic acid)PolylactideReviewStereocomplexTernary

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Area of Science:

  • Polymer Science
  • Materials Science
  • Biomaterials Engineering

Background:

  • Poly (lactic acid) (PLA) is a biobased, biodegradable polymer with desirable properties for biomedical and commodity applications.
  • However, PLA exhibits limitations including poor melt strength, slow crystallization, brittleness, and low toughness.
  • Blending is a cost-effective strategy to overcome these limitations and tailor PLA properties.

Purpose of the Study:

  • To review the synthesis, processing, and properties of various PLA-based blend systems.
  • To compare the interrelationships between synthesis, processing, morphology, and properties in these blends.
  • To highlight the development of PLA blends for diverse applications.

Main Methods:

  • Review of literature on PLA blend systems developed over the last two decades.
  • Analysis of different blend types: stereocomplex blends (PLLA/PDLA), binary blends, ternary blends (with fillers like nanoparticles), and blend foams.
  • Comparison of synthesis, processing, morphology, and property relationships.

Main Results:

  • Exploration of miscible blends (e.g., PLLA/PDLA for stereocomplex crystals).
  • Investigation of binary and ternary immiscible/miscible blends with other thermoplastics and fillers.
  • Development of PLA-based blend foams with tailored properties.
  • Establishment of structure-property relationships in various PLA blend systems.

Conclusions:

  • PLA blending is a viable approach to enhance material properties and overcome inherent limitations.
  • Diverse PLA blend systems, including stereocomplex, binary, ternary, and foam systems, have been developed.
  • Understanding the synthesis/processing-morphology-properties interrelationships is crucial for optimizing PLA blends for specific applications.