EPS
Expanded Polystyrene
Glass Transition (Tg)
100 °C
Melting Point (Tm)
— (amorphous)
Density
0.01–0.05 g/cm³
CAS Number
9003-53-6
Recycling Code
♺ 6
Category
Commodity
Repeat Unit
–[CH₂–CH(C₆H₅)]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
Closed-cell foam that is ~98 % air; outstanding thermal insulation and shock absorption; very low density.
Applications
Building insulation, protective packaging, lightweight fill in civil works.