EP
Epoxy Resin
Glass Transition (Tg)
60–200 (cure-dependent)
Melting Point (Tm)
— (crosslinked)
Density
1.10–1.40 g/cm³
CAS Number
25068-38-6
Recycling Code
None
Category
Thermoset
Repeat Unit
–[O–C₆H₄–C(CH₃)₂–C₆H₄–O–CH₂–CH(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
Cures by ring-opening of the epoxide group with no volatile by-products, so shrinkage is very low (~2 %); outstanding adhesion; Tg is set entirely by the cure schedule and hardener chemistry.
Applications
Carbon-fibre composite matrix, structural adhesives, PCB laminates, coatings.