General Properties
Short Name:
Name:
PA6/3T
Polyamide 6/3T
Polyamide 6/3T belongs to the semi-aromatic amorphous polyamides, made of the monomer trimethyl hexamethylene diamine and terephthalic acid (T represents terephthalic acid). Polyamide 6/3T has a quite irregular structure, strongly decreasing the tendency to crystallize.
Structural Formula
Properties
| Glass Transition Temperature | 145 to 153°C |
|---|---|
| Melting Temperature | - |
| Melting Enthalpy | - |
| Decomposition Temperature | 460 to 470°C |
| Young's Modulus | 2000 MPa |
| Coefficient of Linear Thermal Expansion | 80 *10-6/K |
| Specific Heat Capacity | 1.6 J/(g*K) |
| Thermal Conductivity | 0.23 W/(m*K) |
| Density | 1.12 g/cm³ |
| Morphology | Amorphous thermoplastic |
| General properties | High mechanical stability. High chemical resistance. Good electrical insulation properties. Low processing shrinkage and tendency to wrap |
| Processing | Extrusion, injection molding, blow molding |
| Applications | Electrical engineering/electronics (switch housings, gear wheels, push buttons …). Mechanical and apparatus engineering (valve and control blocks, flow meter ...). Water management and filter technology |
NETZSCH Measurement
| Instrument | DSC 204 F1 Phoenix® |
| Sample Mass | 12.73 mg |
| Isothermal Phase | 3 min / 3 min / 5 min |
| Heating/Colling Rates | 10 K/min |
| Crucible | Al, pierced lid |
| Atmosphere | N2 (50 ml/min) |
Evaluation
Typically an amorphous polymer, PA6/3T exhibits a glass transition with a midpoint temperature of 142°C (1st heating, blue, midpoint) and 147°C (2nd heating, red, midpoint) which was overlapped by a RelaxationWhen a constant strain is applied to a rubber compound, the force necessary to maintain that strain is not constant but decreases with time; this behavior is known as stress relaxation. The process responsible for stress relaxation can be physical or chemical, and under normal conditions, both will occur at the same time. relaxation peak in the 2nd heating. The step heights (Δcp) of this example were approx. 0.39 J/(g.K) (mean value of both heatings).