PF
Phenol Formaldehyde (Bakelite)
Glass Transition (Tg)
— (crosslinked)
Melting Point (Tm)
— (decomposes)
Density
1.25–1.30 g/cm³
CAS Number
9003-35-4
Recycling Code
None
Category
Thermoset
Repeat Unit
–[C₆H₃(OH)–CH₂]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
The first fully synthetic plastic (1907); excellent heat resistance, dimensional stability and very low smoke; dark colour only; condensation cure releases water.
Applications
Electrical switchgear, brake pads, plywood adhesive, foundry binders.