PAA (polyarylate or polyacrylic acid, exact composition unspecified) is an engineering polymer known for high stiffness, excellent thermal stability, and significant strain capacity before fracture. It is commonly used in precision structural components, electrical insulation, and high-temperature applications where dimensional stability and load-bearing performance are critical; engineers select it over commodity plastics when superior mechanical strength and thermal resistance are required without the cost or processing complexity of thermoset composites.
Compliance & Regulations
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Compressive Strength(σc) | 12.52 | MPa | — | ||
Elongation at Break(εf) | 382.2 | - | — | ||
Flexural Strength (MOR)(σf) | 64.94 | MPa | — | ||
Hardness (Vickers)(HV) | 365 | HV | — | ||
Ultimate Tensile Strength(σUTS) | 11.69 | MPa | — | ||
Young's Modulus(E) | 389.1 | MPa | — |
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Glass Transition Temperature(Tg) | 384.5 | K | — | ||
Melting Point / Solidus(Tm) | 409.1 | K | — | ||
Maximum Service Temperature(Tmax) | 592.9 | K | — | ||
Thermal Conductivity(k) | 0.4395 | W/(m·K) | — |
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Band Gap(Eg) | 2.612 | eV | — |
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Refractive Index(n) | 1.479 | - | — |