PBS (Polybutylene Succinate)
Quick Overview
PBS is a biodegradable polyester with excellent mechanical properties and heat resistance. Synthesized from renewable or petrochemical sources, PBS offers superior processability and performance compared to PLA for engineering and durable applications.
What Is PBS?
Polybutylene Succinate (PBS) is a biodegradable polyester that bridges the gap between performance-oriented engineering plastics and environmentally sustainable materials. With properties comparable to polypropylene and better heat resistance than PLA, PBS addresses one of the key limitations of first-generation bioplastics: the need for higher-performance durable materials.
Both monomers — succinic acid and 1,4-butanediol — can be produced from renewable biomass, enabling fully bio-based PBS.
Key Properties
| Property | PBS | PLA | PP (reference) |
|---|---|---|---|
| Tensile strength | 30–50 MPa | 50–70 MPa | 30–40 MPa |
| Elongation at break | 200–400% | 3–8% | 200–400% |
| Melting point | 90–120°C | 150–180°C | 160–170°C |
| Heat deflection | 90–100°C | 55–60°C | 100–110°C |
| Compostable | Yes (EN 13432) | Yes (with PBAT) | No |
| Bio-based option | Yes (100% possible) | Yes (100%) | Bio-PP emerging |
Applications
Packaging
- Bottles and containers for personal care
- Food packaging films and trays
- Flexible pouches and paper coatings
Automotive
- Interior components (panels, trim, upholstery backing)
- Under-hood applications benefiting from heat resistance
Agriculture
- Mulch films with longer service life than PLA
- Seed tapes, plant pots, slow-release fertiliser coatings
Textiles
- Nonwoven fabrics for hygiene products
- Agricultural textiles, technical fibres
3D Printing
- Filaments requiring better heat resistance than PLA
Frequently Asked Questions
Is PBS commercially available? Yes, from producers including PTT MCC Biochem (BioPBS™), Mitsubishi Chemical, and BASF. Production capacity is smaller than PLA but growing.
Is PBS biodegradable? Yes. PBS is certified to EN 13432 and biodegrades in industrial composting within 180 days. It also biodegrades in soil over 6–24 months.
Can PBS be 100% bio-based? Yes. Both succinic acid and 1,4-butanediol can be produced via fermentation. Fully bio-based PBS is commercially available.
How does PBS compare to PLA? PBS offers superior flexibility, impact resistance, and heat resistance. PLA is stiffer and cheaper but brittle. PBS is better for durable applications; PLA excels in rigid single-use items.
What is PBS’s cost premium over conventional plastics? Typically 2–3× the cost of PE or PP. The premium reflects smaller production scale and bio-based feedstock costs.
Related Terms
- PLA — The most widely used bioplastic; more brittle than PBS
- PBAT — A flexible compostable polymer often blended with PLA
- Bio-PP — Bio-based polypropylene (drop-in, not biodegradable)
- Bioplastic Blends — PBS can be blended to tune properties
- Compostable — PBS meets EN 13432 compostability requirements
Standards & Certifications
- EN 13432 (Industrial Compostable)
- ASTM D6400
- ISO 14855
Major Producers
- PTT MCC Biochem
- Mitsubishi Chemical
- Showa Denko
- BASF
- Kingfa
Key Applications
- Engineering plastics
- Textiles and fibers
- Bottles and containers
- Automotive components
- Agricultural films
- Injection-molded parts