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

Amodel-thermal-properties

 

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

Amodel-moisture-and-tensile-strength

 

Effect of moisture on flexural modulus, ASTM test method

Amodel-moisture-and-flexural-modulus

 

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
  • Glycols
  • Synthetic motor oil
  • Road salt
  • Sulfuric acid
  • Transmission fluid
  • Zinc chloride