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Gomez-Caturla, Jaume
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- 2024The Influence of In-Mould Annealing and Accelerated Ageing on the Properties of Impact-Modified Poly(Lactic Acid)/Biochar Composites
- 2023Incorporation of argan shell flour in a biobased polypropylene matrix for the development of high environmentally friendly composites by injection moldingcitations
- 2023Effect of dibutyl itaconate on plasticization efficiency of a REX processed polylactide with peroxidescitations
- 2023Improvement of Poly(lactide) Ductile Properties by Plasticization with Biobased Tartaric Acid Estercitations
- 2021Upgrading Argan Shell Wastes in Wood Plastic Composites with Biobased Polyethylene Matrix and Different Compatibilizerscitations
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article
Improvement of Poly(lactide) Ductile Properties by Plasticization with Biobased Tartaric Acid Ester
Abstract
<jats:title>Abstract</jats:title><jats:p>Diethyl <jats:sc>l</jats:sc>‐tartrate (DET) is used as a biobased plasticizer for poly(lactide) (PLA) formulations with improved ductile properties without compromising biodegradation. Different weight percentages (wt.%) of DET in the 0–50 wt.% range are added to PLA by melt compounding and subsequently processed by injection molding. The effect of wt.% DET on mechanical, thermal, thermo‐mechanical, morphology, biodegradation, and crystallinity is studied. Addition of 20 wt.% DET leads to a noticeable increase in elongation at break up to values of 567%, which is quite an interesting result considering the extreme brittleness of PLA. These results are verified by field emission scanning electron microscopy (FESEM) images, where filament‐like structures are observed, indicative of an effective plasticization. Differential scanning calorimetry (DSC) and dynamic mechanical thermal analysis (DMTA) show that the glass transition temperature of PLA is drastically decreased down to values of 23 °C for the sample with the highest amount of DET (50 wt.%), thus increasing its ductility and processability. Fourier‐transformed infrared spectroscopy (FTIR) spectra show that there exists chemical interactions between PLA and DET. Finally, the biodegradability analysis proves that the developed blends are fully biodegradable, achieving complete disintegration after 49 days. It is observed that DET enhanced the disintegration rate of PLA.</jats:p>