Properties of Syndiotactic Polypropylene (PP)
Syndiotactic polypropylene (sPP) is a distinct form of polypropylene characterized by its regular alternating stereochemical structure. This molecular arrangement imparts unique physical, mechanical, thermal, and electrical properties, making sPP valuable across diverse industrial and research applications.
Looking to buy polymers?
Check pricing and availability through our trusted partner:
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 button 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)