Properties of Syndiotactic Polypropylene (PP)
Syndiotactic polypropylene is a type of polypropylene, which is a thermoplastic polymer widely used in various applications. What sets syndiotactic polypropylene apart is its specific molecular arrangement. In syndiotactic polypropylene, the propylene monomer units in the polymer chain alternate their stereochemistry in a regular pattern, creating a syndiotactic structure.
The following table provides a comprehensive list of syndiotactic polypropylene (PP) properties in both SI and US customary/Imperial units at normal temperature and pressure (NTP).
Click on the icon to switch between Metric and Imperial units.
| Physical Properties | Metric |
|---|---|
| Category | Thermoplastic |
| Density | 890 - 915 kg/m3 |
| Water Absorption | 0.01 %wt/day |
| Mechanical Properties | Metric |
| Ultimate Tensile Strength | 35 MPa |
| Young’s Modulus (E) | 0.69 - 1.52 GPa |
| Rockwell Hardness (R) | 95 |
| Thermal Properties | Metric |
| Melting Point | 135 °C |
| Thermal Conductivity | 0.154 W/m·K |
| Specific Heat Capacity (Cp) | 1960 J/kg·K |
| Coefficient of Thermal Expansion (αL) | 6×10-5 - 9×10-5 1/°C |
| Glass Transition Temperature (Tg) | -10 to -8.2 °C |
| Electrical Properties | Metric |
| Relative Permittivity (@1 MHz) (εr) | 2.2 - 2.3 |
| Electrical Resistivity | 1016 Ω·cm |
| Dielectric Field Strength (Ed) | 200 - 260 kV/cm |
| Hazardous Data | Metric |
| Flammability Rating (ANSI/UL 94) | Combustible |
Unless stated otherwise, all values are taken at room temperature (approximately 20°C or 68°F) and 1 atm pressure. (1 atm = 101,325 Pa)