High-density polyethylene (HDPE) is a semi-crystalline thermoplastic polymer characterized by a linear molecular structure with minimal branching, resulting in high stiffness and strength relative to other polyethylenes. It is widely used across packaging, automotive, and infrastructure sectors where a balance of rigidity, impact resistance, and chemical durability is needed at moderate temperatures. Engineers select HDPE over lower-density polyethylenes when higher modulus and creep resistance are required, and over rigid plastics like polycarbonate when cost and processability are priorities.
Compliance & Regulations
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Compressive Strength(σc) | 26.59 | MPa | — | ||
Elongation at Break(εf) | 215.2 | - | — | ||
Flexural Strength (MOR)(σf) | 98.03 | MPa | — | ||
Hardness (Vickers)(HV) | 53.87 | HV | — | ||
Ultimate Tensile Strength(σUTS) | 37.17 | MPa | — | ||
Young's Modulus(E) | 1.199 | GPa | — |
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Glass Transition Temperature(Tg) | 185.7 | K | — | ||
Melting Point / Solidus(Tm) | 404.9 | K | — | ||
Maximum Service Temperature(Tmax) | 473.2 | K | — | ||
Thermal Conductivity(k) | 1.417 | W/(m·K) | — |
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Band Gap(Eg) | 3.030 | eV | — |
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Refractive Index(n) | 1.534 | - | — |