PBS
Polybutylene Succinate
Glass Transition (Tg)
-32 °C
Melting Point (Tm)
112–115 °C
Density
1.26 g/cm³
CAS Number
25777-14-4
Recycling Code
♺ 7
Category
Biodegradable
Repeat Unit
–[O–(CH₂)₄–O–CO–(CH₂)₂–CO]ₙ–
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
Biodegradable aliphatic polyester with mechanical behaviour close to PP and much better ductility than PLA; can be partly bio-based.
Applications
Mulch film, compostable bags, food containers, PLA toughening.