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Key Features & Applications of Polyimide (PI)

Polyimide (PI) - Key Properties

Learn more about all polyimide properties and their values - ranging from mechanical to electrical to chemical properties, to make right selection for your application.

Overview

Popular Applications

Key Properties

Property POLYIMIDE
Chemical Resistance
Acetone @ 100%, 20°C Satisfactory
Ammonium hydroxide @ 10%, 20°C Non-Satisfactory
Aromatic hydrocarbons @ 20°C Satisfactory
Benzene @ 100%, 20°C Satisfactory
Butylacetate @ 100%, 20°C Satisfactory
Chloroform @ 20°C Limited
Concentrated acids @ 20°C Non-Satisfactory
Concentrated acids @ hot conditions Non-Satisfactory
Ethanol @ 96%, 20°C Satisfactory
Glycerol @ 100%, 20°C Non-Satisfactory
Hydrogen peroxide @ 30%, 60°C Non-Satisfactory
Kerosene @ 20°C Satisfactory
Methanol @ 100%, 20°C Non-Satisfactory
Methylethyl ketone @ 100%, 20°C Satisfactory
Mineral oil @ 20°C Satisfactory
Silicone oil @ 20°C Satisfactory
Sodium hydroxide @ 10%, 20°C Non-Satisfactory
Sodium hydroxide @ 10%, 60°C Non-Satisfactory
Sodium hydroxide @ 10%, 90°C Non-Satisfactory
Sodium hypochlorite @ 20%, 20°C Limited
Strong acids @ 20°C Limited
Toluene @ 20°C Satisfactory
Xylene @ 20°C Satisfactory
Electrical
Dielectric Constant 3.1 - 3.55 
Dielectric Strength, kV/mm 22 - 27.6
Dissipation Factor x 10-4 18 - 50
Volume Resistivity x 1015, Ohm.cm 14 - 18
Mechanical
Elongation at Break, % 90 
Elongation at Yield, % 4 - 10
Flexural Modulus, Gpa 2.48 - 4.1
Hardness Rockwell M 110 
Strength at Break (Tensile), MPa 72 - 120
Strength at Yield (Tensile), MPa 120
Toughness (Notched Izod Impact at Room Temperature), J/m 60 - 112
Young's Modulus, GPa 1.3 - 4
Physical
Water Absorption 24 hours, % 1.34 - 1.43
Density, g/cm3 1.31 - 1.43
Glass Transition Temperature, °C 250 - 340 
Shrinkage, % 0.2 - 1.2 
Service Temperature
HDT @1.8 Mpa (264 psi), °C 240 - 360
Max Continuous Service Temperature, °C 260 - 360
Thermal
Coefficient of Linear Thermal Expansion x 10-5, /°C 5.5
Fire Resistance (LOI), % 47 - 53
Flammability, UL94 V0

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