Biodegradable Polymer Properties and Applications

Biodegradable polymers encompass a diverse group of materials capable of undergoing degradation by biological processes into benign end products. These include aliphatic polyesters such as polylactic acid (PLA), polyhydroxyalkanoates (PHA), polybutylene succinate (PBS) and copolyesters like polybutylene adipate terephthalate (PBAT), as well as emerging biobased aromatic polyesters derived from furan and thiophene building blocks. Key properties such as crystallinity, molecular weight, mechanical strength, thermal stability and permeability are intimately linked to polymer architecture and processing conditions. High crystallinity generally enhances mechanical rigidity and barrier performance, whereas amorphous domains accelerate hydrolytic and enzymatic breakdown. The incorporation of copolymers, fillers and nanocomposites enables fine tuning of mechanical, barrier and degradation profiles. Applications span flexible and rigid food packaging, agricultural mulch films, biomedical devices and controlled drug delivery systems, aligning material lifetimes with end-of-life requirements and reducing environmental impact. Continued innovations in synthesis and formulation seek to reconcile performance demands with sustainable feedstocks and circular-economy paradigms.

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Biodegradable Polymer Properties and Applications publication trend

The graph below shows the total number of articles in biodegradable polymer properties and applications across all publications each year (not limited to Nature Index journals).

Technical terms

Aliphatic polyester: A polymer containing ester linkages in the backbone derived from aliphatic (non-aromatic) monomers, known for hydrolytic and enzymatic degradability.

Crystallinity: The degree of ordered regions within a polymer, influencing mechanical strength, barrier properties and degradation rate.

Barrier properties: The ability of a material to resist permeation of gases (e.g. O2, CO2) and vapours, critical for packaging applications.

Enzymatic degradation: Breakdown of polymers through enzyme-catalysed hydrolysis of ester bonds, often leading to surface erosion.

Copolymerisation: The chemical process of combining two or more distinct monomers into a single polymer chain to tailor material properties.

References

1. Biodegradable Polymers. Materials (2009).
2. Nanocomposites Based on Biodegradable Polymers. Materials (2018).
3. A glimpse of biodegradable polymers and their biomedical applications. e-Polymers (2019).
4. Poly(propylene 2,5-thiophenedicarboxylate) vs. Poly(propylene 2,5-furandicarboxylate): Two Examples of High Gas Barrier Bio-Based Polyesters. Polymers (2018).
5. Enzymatic Degradation of the Most Common Aliphatic Bio-Polyesters and Evaluation of the Mechanisms Involved: An Extended Study. Polymers (2022).
6. Biodegradation Behavior of Degradable Mulch with Poly (Butylene Adipate-co-Terephthalate) (PBAT) and Poly (Butylene Succinate) (PBS) in Simulation Marine Environment. Polymers (2022).
7. A Review on Current Strategies for the Modulation of Thermomechanical, Barrier, and Biodegradation Properties of Poly (Butylene Succinate) (PBS) and Its Random Copolymers. Polymers (2022).