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) | 272.1 | ksi | — | ||
Elongation at Break(εf) | 33.22 | - | — | ||
Flexural Strength (MOR)(σf) | 7.832 | ksi | — | ||
Hardness (Vickers)(HV) | 1,000 | HV | — | ||
Ultimate Tensile Strength(σUTS) | 18.49 | ksi | — | ||
Young's Modulus(E) | 946.2 | ksi | — |
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Glass Transition Temperature(Tg) | 173.2 | °F | — | ||
Melting Point / Solidus(Tm) | 480.4 | °F | — | ||
Maximum Service Temperature(Tmax) | 598.4 | °F | — |
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Band Gap(Eg) | 3.725 | eV | — |
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Refractive Index(n) | 1.520 | - | — |