Microstructure and Mechanical Properties of Compatibilized Polylactide/Thermoplastic Starch Blends

  • Seyed Ali Nezamzadeh
  • Zahed AhamadiEmail author
  • Faramarz Afshar Taromi
Conference paper


Biodegradable polymer blends of polylactic acid/thermoplastic starch (PLA/TPS) were prepared via direct melt blending varying order of mixing of ingredients fed into the extruder. The effect of interface interactions between PLA and TPS in the presence of maleic anhydride (MA) compatibilizer on the microstructure and mechanical properties was then investigated. The prepared PLA/TPS blends were characterized by scanning electron microscopy, differential scanning calorimetry (DSC), tensile, and rheological measurements. Morphology of PLA/TPS shows that the introduction of MA into the polymer matrix increases the presence of TPS at the interface region. The DSC results revealed the reduction of glass transition of PLA with contributions from both TPS and MA. The crystallization temperature was decreased by the addition of MA leading to reduction of overall crystallization of PLA/TPS blend. The mechanical measurements show that increasing MA content up to 2 wt% enhances the modulus of PLA/TPS more than 45% compared to the corresponding blends free of MA compatibilizer.


Interface Maleic anhydride Mechanical properties Poly(lactic acid) Thermoplastic starch 


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Copyright information

© Springer Nature Switzerland AG 2020

Authors and Affiliations

  • Seyed Ali Nezamzadeh
    • 1
  • Zahed Ahamadi
    • 2
    Email author
  • Faramarz Afshar Taromi
    • 1
  1. 1.Department of Polymer EngineeringAmirkabir University of TechnologyTehranIran
  2. 2.Department of ChemistryAmirkabir University of TechnologyTehranIran

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