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Designed for Molecular Recycling: A Lignin-Derived Semi-aromatic Biobased Polymer
Published on: November 30, 2020
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Environmentally Friendly Polymer Compositions with Natural Amber Acid
Malgorzata Latos-Brozio1, Anna Masek1
1Faculty of Chemistry, Institute of Polymer and Dye Technology, Lodz University of Technology, Stefanowskiego 12/16, 90-924 Lodz, Poland.
International Journal of Molecular Sciences
|February 9, 2021
Summary
Natural succinic acid can stabilize biodegradable polyesters like PLA and PHA against oxidation and aging. Optimal concentrations (1-1.5 wt%) enhance material durability, while higher amounts accelerate degradation.
Area of Science:
- Polymer Science
- Materials Science
- Green Chemistry
Background:
- Commercial stabilizers in polymers pose health and environmental risks.
- Natural phenolic acids are explored as eco-friendly alternatives.
- Biodegradable polyesters like polylactide (PLA) and polyhydroxyalkanoate (PHA) require stabilization.
Purpose of the Study:
- To investigate succinic acid as a stabilizer for PLA and PHA blends.
- To evaluate the impact of succinic acid on the thermooxidative and solar aging resistance of these biopolymers.
- To determine optimal concentrations for effective stabilization.
Main Methods:
- Preparation of PLA/PHA blends with varying succinic acid content (1-4 wt%).
- Controlled thermooxidation and solar aging tests.
- Analysis using Differential Scanning Calorimetry (DSC), surface energy measurements, mechanical testing, and spectrophotometry for color change.
Main Results:
- Succinic acid at 1-2 wt% improved oxidation resistance (DSC).
- Optimal stabilization was observed at 1-1.5 wt% succinic acid.
- Higher concentrations (above 2 wt%) exhibited a pro-oxidative effect, accelerating aging and reducing material lifetime (low aging coefficients K).
Conclusions:
- Succinic acid can function as a stabilizer for PLA and PHA, enhancing their resistance to degradation.
- The concentration of succinic acid is critical; lower levels stabilize, while higher levels promote oxidation.
- This study demonstrates the potential to tailor the service life and longevity of biopolymers using natural additives like succinic acid.
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