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

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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.

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Acknowledgments

This work was supported by the Austrian Agency for International Cooperation in Education and Research (OeAD-GmbH) (project No. WTZ 05/2009) and by The Ministry of Education, Youth and Sport of the Czech Republic (project No. 2B08071).

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Authors and Affiliations

  1. Institute for Chemistry and Technology of Materials, Faculty of Technical Chemistry, Chemical and Process Engineering, Biotechnology, Graz University of Technology, Stremayrgasse 9, 8010, Graz, Austria

    Adriana Gregorova, Hari Jachandra & Franz Stelzer

  2. Polymer Centre, Faculty of Technology, Tomas Bata University in Zlin, Namesti T. G. Masaryka 275, 76272, Zlin, Czech Republic

    Vladimir Sedlarik

  3. Jozef Stefan Institute, Jamova cesta 39, 1000, Ljubljana, Slovenia

    Vladimir Sedlarik

  4. Department of Polymer Engineering, Faculty of Technology, Tomas Bata University in Zlin, Namesti T. G. Masaryka 275, 76272, Zlin, Czech Republic

    Miroslav Pastorek

Authors
  1. Adriana Gregorova
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  2. Vladimir Sedlarik
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  3. Miroslav Pastorek
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  4. Hari Jachandra
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  5. Franz Stelzer
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Correspondence to Adriana Gregorova.

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Gregorova, A., Sedlarik, V., Pastorek, M. et al. Effect of Compatibilizing Agent on the Properties of Highly Crystalline Composites Based on Poly(lactic acid) and Wood Flour and/or Mica. J Polym Environ 19, 372–381 (2011). https://doi.org/10.1007/s10924-011-0292-6

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  • DOI: https://doi.org/10.1007/s10924-011-0292-6

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