Engineering Thermoplastics
SMA Standard — Styrene Maleic Anhydride Standard
SMA offers better heat resistance and dimensional stability compared to general-purpose polystyrene. It can be modified to improve impact strength and chemical resistance, making it suitable for various automotive and appliance applications.
SMAXyronStyron SMA
Manufacturers
2
Grades
2
Applications
4
Equivalents
1
Physical Properties
- Density
- 1.05-1.10 g/cm³
- Water Absorption (24h)
- 0.1-0.3 %
- Transparency
- Opaque or Transparent (depending on grade)
- Shrinkage
- 0.4-0.7 %
Mechanical Properties
- Young's Modulus
- 2.5-3.5 GPa
- Tensile Strength
- 45-60 MPa
- Elongation at Break
- 5-15 %
- Impact Strength (Izod)
- 5-10 kJ/m
Thermal Properties
- Glass Transition Temperature
- 90-120 °C
- Melting Point
- N/A (amorphous)
- Continuous Service Temperature
- 60-80 °C
- Heat Deflection Temperature
- 80-100 °C (1.8 MPa)
Electrical Properties
- Dielectric Constant
- 2.7-3.0
- Volume Resistivity
- 10^13-10^15 Ohm-cm
- Dielectric Strength
- 16-20 kV/mm
Chemical Resistance
- Acids
- Good
- Bases
- Poor
- Solvents
- Poor
- UV Resistance
- Poor
Sustainability
- Recyclability
- Recyclable
- Recycling Code
- 7 (Other)
- Carbon Footprint
- Moderate
Manufacturing compatibility
Injection MoldingExtrusion
Applications
Automotive interior parts
Appliance housings
Housings for electronics
Coatings
Available grades
SMA FRSMA High Heat