ABS
Acrylonitrile Butadiene Styrene
Glass Transition (Tg)
~105 °C
Melting Point (Tm)
— (amorphous)
Density
1.04–1.07 g/cm³
CAS Number
9003-56-9
Recycling Code
♺ 7
Category
Engineering
Repeat Unit
–[CH₂–CH=CH–CH₂]ₓ–[CH₂–CH(C₆H₅)]ᵧ–[CH₂–CH(CN)]𝑧–
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
Two-phase system: rigid SAN matrix with dispersed polybutadiene rubber; balanced toughness, rigidity and processability; poor UV resistance.
Applications
LEGO bricks, automotive interior trim, 3D printing, appliance housings.