Ultra-high-molecular-weight polyethylene (UHMWPE) is a linear polymer with an exceptionally long chain structure, specified under ASTM F648, offering an unusual combination of low density, high impact resistance, and excellent wear behavior. It is widely used in orthopedic implants (joint replacements, bearing surfaces), industrial wear components (conveyor systems, chute liners), marine applications, and medical devices where its low friction and self-lubricating properties reduce component degradation. Engineers select UHMWPE over standard polyethylene or competing polymers when prolonged wear life, biocompatibility, and minimal friction are critical, though its relatively low stiffness and moderate temperature ceiling require careful design consideration.
Compliance & Regulations
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Compressive Strength(σc) | 25.00 | MPa | — | ||
Elongation at Break(εf) | 350 | - | — | ||
Fracture Toughness(KIC) | 4,500,000 | Pa·√m | — | ||
Poisson's Ratio(ν) | 0.4600 | - | — | ||
Ultimate Tensile Strength(σUTS) | 40.00 | MPa | ASTM F648 | ||
Yield Strength (0.2% offset)(σy) | 21.00 | MPa | — | ||
Young's Modulus(E) | 800.0 | MPa | — |
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Melting Point / Solidus(Tm) | 408.2 | K | — | ||
Specific Heat Capacity(Cp) | 1.900 | J/(kg·K) | — | ||
Thermal Conductivity(k) | 0.4100 | W/(m·K) | — |
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Density(ρ) | 930 | kg/m³ | — |