PBAT
Poly(butylene adipate-co-terephthalate)
Glass Transition (Tg)
-30 °C
Melting Point (Tm)
110–120 °C
Density
1.26 g/cm³
CAS Number
55231-08-8
Recycling Code
♺ 7
Category
Biodegradable
Repeat Unit
–[O–(CH₂)₄–O–CO–(CH₂)₄–CO]ₓ–[O–(CH₂)₄–O–CO–C₆H₄–CO]ᵧ–
The repeating unit is the smallest structural fragment whose repetition builds the whole chain. Subscripts show the relative share of each unit in copolymers.
Key Properties
Highly flexible and tough (elongation >500 %) while remaining compostable; almost always blended with brittle PLA or starch to balance properties.
Applications
Compostable carrier bags, mulch film, PLA blend partner (Ecoflex).