PA11: Polyamide 11
- Short Name
- PA11
- Name
- Polyamide 11
- Group
- ETP - Engineering Thermoplastics
- General Properties
- Chemical Formula
- Structural Formula
-
Properties
- Glass Transition Temperature
- 40 to 55 °C
- Melting Temperature
- 180 to 190 °C
- Melting Enthalpy
- 224 J/g
- Decomposition Temperature
- 430 to 455 °C
- Young's Modulus
- 1400 MPa
- Coefficient of Linear Thermal Expansion
- 85 to 120 *10¯6/K
- Specific Heat Capacity
- 1.26 J/(g*K)
- Thermal Conductivity
- 0.23 to 0.28 W/(m*K)
- Density
- 1.03 to 1.05 g/cm³
- Morphology
- Semi-crystalline thermoplastic
- General properties
- Good combination of stability, toughness and hardness. High aging resistance. Good chemical resistance. Low water absorption compared to other polyamide types
- Processing
- Extrusion
- Applications
- Transportation, Packaging, tubes and films, Medicine, Electrical and electronics industry
Internet Links
NETZSCH Measurements
- Instrument
- DSC 204 F1 Phoenix®
- Sample Mass
- 11.29 mg
- Isothermal Phase
- 3 min
- Heating/Colling Rates
- 10 K/min
- Crucible
- Al, pierced
- Atmosphere
- N2 (40 ml/min)
Evaluation
Polyamides can absorb humidity. This affects the position of the glass transition due to the plasticizing properties of water.
In the measuring curves shown above, a small peak can be seen in the 1st heating (blue) at 82°C, probably due to the evaporation of water. As a result, the glass transition temperature increases from 51°C in the 1st heating (blue, midpoint) to 53°C
in the 2nd heating (green, again midpoint).
Endothermal melting of the semi-crystalline polymer occurs at 184°C (peak temperature) in the 2nd heating with a melting enthalpy of 52 J/g.
In the measuring curves shown above, a small peak can be seen in the 1st heating (blue) at 82°C, probably due to the evaporation of water. As a result, the glass transition temperature increases from 51°C in the 1st heating (blue, midpoint) to 53°C
in the 2nd heating (green, again midpoint).
Endothermal melting of the semi-crystalline polymer occurs at 184°C (peak temperature) in the 2nd heating with a melting enthalpy of 52 J/g.