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Licensed Unlicensed Requires Authentication Published by De Gruyter June 25, 2016

Effect of PHB on the properties of biodegradable PLA blends

Zuzana Vanovčanová EMAIL logo , Pavol Alexy , Jozef Feranc , Roderik Plavec , Ján Bočkaj , Leona Kaliňáková , Katarína Tomanová , Dagmara Perďochová , Dávid Šariský and Ivana Gálisová
From the journal Chemical Papers


Blends of biodegradable polymers polylactic acid/thermoplastic starch/polyhydroxybutyrate (PLA/TPS/PHB) were prepared using a twin-screw extruder. The TPS content was constant (50 %) and the PHB content in the blends was gradually changed from 0 mass % to 20 mass %. TPS was prepared by melting, where a mixture of native starch, water and glycerol was fed into the twin-screw extruder. Average temperature of extrusion was 180 °C and the concentration of glycerol was 40 mass %. Influence of the PHB concentration in the blend and that of the processing technology on the mechanical and rheological properties of the PLA/PHB composition containing TPS were studied. Mechanical properties were measured 24 h after the film and monofilament preparation and also after the specific storage time to study the effect of storage on the properties. The results indicate that differences in morphology strongly influence the mechanical properties of the studied materials with identical material composition.


This work was supported by the Slovak Research and Development Agency (project no. APVV-14-0301).


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Received: 2015-10-6
Revised: 2016-2-16
Accepted: 2016-3-1
Published Online: 2016-6-25
Published in Print: 2016-10-1

© 2016 Institute of Chemistry, Slovak Academy of Sciences

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