PS
Polystyrene (GPPS)
Glass Transition (Tg)
100 °C
Melting Point (Tm)
— (amorphous)
Density
1.04–1.06 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
Atactic and fully amorphous; glass-clear; very brittle; excellent dimensional stability and dielectric properties.
Applications
Disposable cutlery, CD cases, laboratory ware, petri dishes.