UHMWPE
Ultra-High Molecular Weight Polyethylene
Glass Transition (Tg)
-110 °C
Melting Point (Tm)
130–136 °C
Density
0.93–0.94 g/cm³
CAS Number
9002-88-4
Recycling Code
None
Category
Engineering
Repeat Unit
–[CH₂–CH₂]ₙ– (Mw > 3.5 M)
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
Extremely high abrasion resistance and impact toughness; self-lubricating; cannot be processed by conventional melt extrusion due to very high melt viscosity.
Applications
Hip and knee implants, ballistic armour (Dyneema), conveyor components.