Effect of Compatibilizing Agent on the Properties of Highly Crystalline Composites Based on Poly(lactic acid) and Wood Flour and/or Mica

  • Adriana Gregorova
  • Vladimir Sedlarik
  • Miroslav Pastorek
  • Hari Jachandra
  • Franz Stelzer
Original Paper

DOI: 10.1007/s10924-011-0292-6

Cite this article as:
Gregorova, A., Sedlarik, V., Pastorek, M. et al. J Polym Environ (2011) 19: 372. doi:10.1007/s10924-011-0292-6

Abstract

This article contains a concept of the mechanical properties improvement of the highly crystalline poly(lactic acid) (PLA) and filled composites. PLA as a semi-crystalline thermoplastic polymer was plasticized with poly(ethylene glycol) and filled with 30 vol% of organic and/or inorganic filler. The degree of crytallinity was intentionally increased by annealing. The filler/polymer matrix interphase was modified with the addition of 4, 4′-Methylenediphenyl diisocyanate (MDI). The effect of compatibilizing as well as plasticizing agent on the thermal and mechanical properties, the water-absorption behaviour and crystallization characteristics were studied. The results indicated that high content of filler and crystallites have a strong influence on the composite′s mechanical properties despite of the plasticizer content, showing a high Young modulus. The MDI seems to react in preference easy with plasticizing agent and then alternatively with filler due to the low functionality of commercial PLA grade.

Keywords

Biodegradable polymers Wood flour Inorganic filler Mechanical properties Crystallinity 

Copyright information

© Springer Science+Business Media, LLC 2011

Authors and Affiliations

  • Adriana Gregorova
    • 1
  • Vladimir Sedlarik
    • 2
    • 3
  • Miroslav Pastorek
    • 4
  • Hari Jachandra
    • 1
  • Franz Stelzer
    • 1
  1. 1.Institute for Chemistry and Technology of Materials, Faculty of Technical Chemistry, Chemical and Process Engineering, BiotechnologyGraz University of TechnologyGrazAustria
  2. 2.Polymer Centre, Faculty of TechnologyTomas Bata University in ZlinZlinCzech Republic
  3. 3.Jozef Stefan InstituteLjubljanaSlovenia
  4. 4.Department of Polymer Engineering, Faculty of TechnologyTomas Bata University in ZlinZlinCzech Republic

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