ArticleMaterials (Basel, Switzerland)2024
Long-Term Thermal Stabilization of Poly(Lactic Acid).
Article in Materials (Basel, Switzerland), 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 5 papers.
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Who cites it
5 citing papers in PubMed.
- A Green Approach Towards Desalination: Sustainable Poly(lactic acid) Membranes for Pervaporation Desalination.Membranes · 2026Review
- Polylactide Modified with ZnO and Raspberry Leaf Extract as Active Food Packaging.International journal of molecular sciences · 2026Article
- Lactic Acid-Loaded Hydrogels for Post-Episiotomy Wound Healing: Microenvironment Engineering and Regenerative Strategies-A Narrative Review.Molecules (Basel, Switzerland) · 2026Review
- Effect of primary-secondary synergistic system on the aging resistance ofRSC advances · 2026Article
- Oxidation Strength of PLA Filled with Algal Biomass and Rosemary Extract Powders for Food-Safe Handling.Polymers · 2026Article
Corrections and comments
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Authors and funding
3 authors.
Funding
Abstract
To use polylactic acid in demanding technical applications, sufficient long-term thermal stability is required. In this work, the thermal aging of polylactic acid (PLA) in the solid phase at 100 °C and 150 °C is investigated. PLA has only limited aging stability without the addition of stabilizers. Therefore, the degradation mechanism in thermal aging was subsequently investigated in more detail to identify a suitable stabilization strategy. Investigations using nuclear magnetic resonance spectroscopy showed that, contrary to expectations, even under thermal aging conditions, hydrolytic degradation rather than oxidative degradation is the primary degradation mechanism. This was further confirmed by the investigation of suitable stabilizers. While the addition of phenols, phosphites and thioethers as antioxidants leads only to a limited improvement in aging stability, the addition of an additive composition to provide hydrolytic stabilization results in extended durability. Efficient compositions consist of an aziridine-based hydrolysis inhibitor and a hydrotalcite co-stabilizer. At an aging temperature of 100 °C, the time until significant polymer chain degradation occurs is extended from approx. 500 h for unstabilized polylactic acid to over 2000 h for stabilized polylactic acid.
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Registered trials
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