ArticlePolymers2022
Impact of Melt Processing Conditions on the Degradation of Polylactic Acid.
Article in Polymers, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 16 papers.
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Who cites it
16 citing papers in PubMed, 40 citations in OpenAlex.
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- Investigation of the synergistic effects of UV radiation and elevated temperatures on regenerated cellulose fiber-reinforced bio-polyamide 5.10 composites.Scientific reports · 2026Article
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- Mechanically Recycled PLA Films Reinforced with Rice Husk and Carbonized Rice Husk Particles.Polymers · 2026Article
- Polylactic Acid and Polybutylene Succinate Biopolymer Blends for Extrusion Processing: Dry Blending vs. Masterbatch Dilution.Polymers · 2025Article
- Investigation of Buckling and Failure in Thin-Walled Columns Fabricated from PLA and PETG Using FDM 3D Printing.Materials (Basel, Switzerland) · 2025Article
- Evaluating Polylactic Acid and Basalt Fibre Composites as a Potential Bioabsorbable Stent Material.Polymers · 2025Article
- Effect of Continuous Mixer Design and Parameters on the Degradation of Polylactic Acid.Polymers · 2025Article
- Impacts of Rotor Design, Screw Design, and Processing Parameters in a Farrel Continuous Mixer.Polymers · 2025Article
- Article
- Rheological Changes in Bio-Based Filaments Induced by Extrusion-Based 3D Printing Process.Materials (Basel, Switzerland) · 2024Article
- Article
- PLA Feedstock Filled with Spent Coffee Grounds for New Product Applications with Large-Format Material Extrusion Additive Manufacturing.ACS omega · 2024Article
- Review
- Molecular Pathways for Polymer Degradation during Conventional Processing, Additive Manufacturing, and Mechanical Recycling.Molecules (Basel, Switzerland) · 2023Review
- Poly(butylene adipate-co-terephthalate)/Poly(lactic acid) Polymeric Blends Electrospun with TiOPolymers · 2023Article
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
3 authors at 1 institution in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
To reduce the degradation of polylactic acid (PLA) during processing, which reduces the molecular weight of PLA and its properties, prior studies have recommended low processing temperatures. In contrast, this work investigated the impact of four factors affecting shear heating (extruder type, screw configuration, screw speed, and feed rate) on the degradation of PLA. The polylactic acid was processed using a quad screw extruder (QSE) and a comparable twin screw extruder (TSE), two screw configurations, higher screw speeds, and several feed rates. The processed PLA was characterized by its rheological, thermal, and material composition properties. In both screw configurations, the QSE (which has a greater free volume) produced 3-4 °C increases in melt temperature when the screw speed was increased from 400 rpm to 1000 rpm, whereas the temperature rise was 24-25 °C in the TSE. PLA processed at low screw speeds, however, exhibited greater reductions in molecular weight-i.e., 9% in the QSE and 7% in the TSE. Screw configurations with fewer kneading blocks, and higher feed rates in the QSE, reduced degradation of PLA. At lower processing temperatures, it was found that an increase in melt temperature and shear rate did not significantly contribute to the degradation of PLA. Reducing the residence time during processing minimized the degradation of PLA in a molten state.
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