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Mechanical and Thermal Properties of Polylactide (PLA) Composites Modified with Mg, Fe, and Polyethylene (PE) Additives

1
Faculty of Mechanical Engineering, Bialystok University of Technology, Wiejska 45C, 15-351 Bialystok, Poland
2
Institute of Lightweight Structures and Polymer Technology, Chemnitz University of Technology, Reichenhainer Str. 31-33, 09126 Chemnitz, Germany
*
Author to whom correspondence should be addressed.
Polymers 2020, 12(12), 2939; https://doi.org/10.3390/polym12122939
Received: 9 November 2020 / Revised: 2 December 2020 / Accepted: 6 December 2020 / Published: 9 December 2020
(This article belongs to the Section Biomacromolecules, Biobased and Biodegradable Polymers)
In this article, polylactic acid-based composites reinforced with 5% of polyethylene, iron, and magnesium powders were prepared by extrusion and compressed under the pressure of about 10 MPa and characterized. These composites were mechanically, thermally, and morphologically evaluated. It was found, compared to the pure polylactic acid (PLA), an improvement in tensile strength (both σ and YS0.2) was obtained for the composite with the iron powder addition, while the magnesium powder slightly improved the ductility of the composite material (from 2.0 to 2.5%). Degradation studies of these composites in the 0.9% saline solution over a period of 180 days revealed changes in the pH of the solution from acidic to alkaline, in all samples. The most varied mass loss was observed in the case of the PLA-5%Mg sample, where initially the sample mass increased (first 30 days) then decreased, and after 120 days, the mass increased again. In the context of degradation phenomenon of the tested materials, it turns out that the most stable is the PLA composite with the Fe addition (PLA-5%Fe), with highest tensile strength and hardness. View Full-Text
Keywords: hydrolytic degradation; polylactide (PLA) composite; mechanical properties; crystallinity; activation energy of thermal decomposition hydrolytic degradation; polylactide (PLA) composite; mechanical properties; crystallinity; activation energy of thermal decomposition
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MDPI and ACS Style

Oksiuta, Z.; Jalbrzykowski, M.; Mystkowska, J.; Romanczuk, E.; Osiecki, T. Mechanical and Thermal Properties of Polylactide (PLA) Composites Modified with Mg, Fe, and Polyethylene (PE) Additives. Polymers 2020, 12, 2939. https://doi.org/10.3390/polym12122939

AMA Style

Oksiuta Z, Jalbrzykowski M, Mystkowska J, Romanczuk E, Osiecki T. Mechanical and Thermal Properties of Polylactide (PLA) Composites Modified with Mg, Fe, and Polyethylene (PE) Additives. Polymers. 2020; 12(12):2939. https://doi.org/10.3390/polym12122939

Chicago/Turabian Style

Oksiuta, Zbigniew, Marek Jalbrzykowski, Joanna Mystkowska, Eliza Romanczuk, and Tomasz Osiecki. 2020. "Mechanical and Thermal Properties of Polylactide (PLA) Composites Modified with Mg, Fe, and Polyethylene (PE) Additives" Polymers 12, no. 12: 2939. https://doi.org/10.3390/polym12122939

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