Poly(ethylene terephthalate), or PET, is a thermoplastic polyester synthesized from ethylene glycol and terephthalic acid, forming a semi-crystalline polymer with good strength and stiffness. It is the most widely produced polyester in the world, dominating applications where a combination of mechanical performance, chemical resistance, and thermal stability are needed alongside cost-effectiveness and recyclability. Engineers select PET for its excellent barrier properties to gases and moisture, dimensional stability, and proven long-term performance in both ambient and moderately elevated temperature environments.
Compliance & Regulations
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Compressive Strength(σc) | 1.876 | GPa | — | ||
Elongation at Break(εf) | 33.22 | - | — | ||
Flexural Strength (MOR)(σf) | 54.00 | MPa | — | ||
Hardness (Vickers)(HV) | 1,000 | HV | — | ||
Ultimate Tensile Strength(σUTS) | 127.5 | MPa | — | ||
Young's Modulus(E) | 6.524 | GPa | — |
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Glass Transition Temperature(Tg) | 351.6 | K | — | ||
Melting Point / Solidus(Tm) | 522.3 | K | — | ||
Maximum Service Temperature(Tmax) | 587.8 | K | — |
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Band Gap(Eg) | 3.725 | eV | — |
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Refractive Index(n) | 1.520 | - | — |