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Towards High-performance Materials Based on Carbohydrate-Derived Polyamide Blends.

Aleksandra A Wróblewska1, Nils Leoné2, Stefaan M A De Wildeman3

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Polymers
|April 10, 2019
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Biobased polyamides from GalXMe monomer show potential despite brittleness. Blending with commercial polyamides significantly enhances material strength and Young

Keywords:
biobased polyamidesblendinghigh Tgmechanical properties

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Area of Science:

  • Polymer Science
  • Materials Science
  • Biomaterials

Background:

  • Bio-derived monomers offer sustainable alternatives in polymer production.
  • 2,3:4,5-di-O-isopropylidene-galactarate acid/ester (GalXMe) is a rigid, bulky monomer with potential for high thermal properties and transparency.
  • Biobased polymers often suffer from inherent brittleness, limiting their applications.

Purpose of the Study:

  • To investigate the melt blending of GalXMe-based polyamides (PAs) with commercial PA grades.
  • To characterize the properties of these biobased PA blends.
  • To explore the miscibility, mechanical performance, and thermal stability of the resulting materials.

Main Methods:

  • Melt blending of GalXMe polyamides with commercial polyamides using extrusion.
  • Characterization of blend properties, including miscibility, Young's modulus, and thermal stability.
  • Investigation of blending mechanisms, including transamidation reactions.

Main Results:

  • GalXMe PA blends exhibited limited miscibility with commercial polyamides.
  • Significant increases in Young's modulus were observed, up to 75% for PA(6,12) and 82% for PA(PACM,12).
  • Transamidation reactions improved blend compatibility in some cases; thermal stability varied with diamine type.

Conclusions:

  • Blending GalXMe polyamides with commercial grades enhances mechanical strength, mitigating brittleness.
  • The choice of diamine significantly influences the thermal stability of biobased polyamides under processing conditions.
  • GalXMe-based polyamides show promise for creating high-performance, stronger biobased materials.