Outperforms standard polyamides in heat, moisture and chemical resistance
Amodel® polyphthalamide (PPA) is an aromatic polyamide that outperforms standard polyamides with higher strength and stiffness at elevated temperatures, better retention of properties in humid environments, and greater resistance to a broader range of chemicals.
Higher Heat Resistance
Amodel® PPA is used to replace metal in high-temperature automotive applications. Continuous-use temperatures range from 120°C to 185°C (248°F to 365°F). Heat deflection temperatures (HDT) go up to 310°C (590°F).
Thermal properties comparison, ASTM test method
Lower Moisture Absorption
Humid environments can have a devastating effect on the mechanical properties of standard polyamides. Amodel® PPA’s lower water absorption rate results in significantly less change in strength and stiffness, even with high levels of humidity.
Effect of moisture on tensile strength, ASTM test method
Effect of moisture on flexural modulus, ASTM test method
Better Chemical Resistance
Amodel® PPA’s highly aromatic ring structure provides greater resistance to a broader range of chemicals than standard aliphatic polyamides, even at high temperatures. This enables automotive, electrical and industrial components to withstand prolonged exposure to harsh chemicals:
- Bio-diesel fuel
- Brake fluid
- Calcium chloride
- Synthetic motor oil
- Road salt
- Sulfuric acid
- Transmission fluid
- Zinc chloride