High-Density Polyethylene (HDPE) is a semi-crystalline thermoplastic polymer characterized by a linear molecular structure with minimal branching, giving it higher density and stiffness than its low-density counterpart. It is widely used across packaging, infrastructure, and consumer goods industries due to its excellent chemical resistance, low moisture absorption, and ease of processing through injection molding and extrusion. Engineers select HDPE when they need a cost-effective, durable polymer that balances rigidity with impact resistance, particularly for applications requiring outdoor weathering or contact with harsh chemicals where metals would corrode or more brittle polymers would fail.
Compliance & Regulations
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Compressive Strength(σc) | 33.24 | MPa | — | ||
Elongation at Break(εf) | 437.7 | - | — | ||
Flexural Strength (MOR)(σf) | 32.25 | MPa | — | ||
Hardness (Vickers)(HV) | 56.91 | HV | — | ||
Ultimate Tensile Strength(σUTS) | 27.52 | MPa | — | ||
Young's Modulus(E) | 975.0 | MPa | — |
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Glass Transition Temperature(Tg) | 202.8 | K | — | ||
Melting Point / Solidus(Tm) | 405.2 | K | — | ||
Maximum Service Temperature(Tmax) | 712 | K | — | ||
Thermal Conductivity(k) | 0.8784 | W/(m·K) | — |
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Band Gap(Eg) | 4.300 | eV | — |
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Refractive Index(n) | 1.524 | - | — |