# RPU vs. Thermoset PI

Both RPU and thermoset PI are thermoset plastics. There are 15 material properties with values for both materials. Properties with values for just one material (14, in this case) are not shown.

For each property being compared, the top bar is RPU and the bottom bar is thermoset PI.

Metric UnitsUS Customary Units

## Mechanical Properties

Elongation at Break, % | 90 | |

2.0 to 5.9 |

Flexural Modulus, GPa | 2.0 | |

3.1 to 4.8 |

Flexural Strength, MPa | 83 | |

60 to 100 |

Tensile Strength: Ultimate (UTS), MPa | 60 | |

37 to 81 |

## Thermal Properties

Maximum Temperature: Autoignition, °C | 380 | |

380 |

Maximum Temperature: Decomposition, °C | 270 | |

330 |

Specific Heat Capacity, J/kg-K | 1750 | |

1130 |

Thermal Conductivity, W/m-K | 0.19 | |

0.29 to 1.7 |

Thermal Expansion, µm/m-K | 63 | |

38 to 54 |

## Electrical Properties

Dielectric Strength (Breakdown Potential), kV/mm | 19 | |

20 |

Electrical Resistivity Order of Magnitude, 10^{x} Ω-m |
13 | |

15 |

## Otherwise Unclassified Properties

Density, g/cm^{3} |
1.2 | |

1.4 to 1.6 |

## Common Calculations

Strength to Weight: Axial, points | 14 | |

6.5 to 16 |

Strength to Weight: Bending, points | 28 | |

16 to 30 |

Thermal Diffusivity, mm^{2}/s |
0.090 | |

0.18 to 0.95 |