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Plastics & Elastomers
The material selection platform
Plastics & Elastomers
PP caps

Polypropylene Properties and Their Values

Polypropylene is one of the versatile polymers used and exhibits excellent mechanical properties. Polypropylene also offers good chemical and heat resistance. Some of these characteristics have enabled it to replace polyethylene for several applications. Learn more about all polypropylene properties and their values - ranging from mechanical to electrical to chemical properties, to make right selection for your application.

Overview

Key Applications

Key Properties

Property POLYPROPYLENE
Chemical Resistance
Acetone @ 100%, 20°C Satisfactory
Ammonium hydroxide @ 30%, 20°C Satisfactory
Ammonium hydroxide @ diluted, 20°C Satisfactory
Aromatic hydrocarbons @ 20°C Non Satisfactory
Aromatic hydrocarbons @ hot conditions Non Satisfactory
Benzene @ 100%, 20°C Limited
Butylacetate @ 100%, 60°C Non Satisfactory
Butylacetate @ 100%, 20°C Limited
Chlorinated solvents @ 20°C Non Satisfactory
Chloroform @ 20°C Limited
Dioctylphtalate @ 100%, 20°C Satisfactory
Dioctylphtalate @ 100%, 60°C Limited
Ethanol @ 96%, 20°C Satisfactory
Ethyleneglycol (Ethane diol) @ 100%, 100°C Satisfactory
Ethyleneglycol (Ethane diol) @ 100%, 20°C Satisfactory
Ethyleneglycol (Ethane diol) @ 100%, 50°C Satisfactory
Glycerol @ 100%, 20°C Satisfactory
Hydrogen peroxide @ 30%, 60°C Limited
Kerosene @ 20°C Limited
Methanol @ 100%, 20°C Satisfactory
Methylethyl ketone @ 100%, 20°C Satisfactory
Mineral oil @ 20°C Satisfactory
Phenol @ 20°C Satisfactory
Silicone oil @ 20°C Satisfactory
Sodium hydroxide @ <40%, 60°C Satisfactory
Sodium hydroxide @ 10%, 20°C Satisfactory
Sodium hydroxide @ 10%, 60°C Satisfactory
Sodium hypochlorite @ 20%, 20°C Satisfactory
Strong acids @ concentrated, 20°C Satisfactory
Toluene @ 20°C Limited
Toluene @ 60°C Non Satisfactory
Xylene @ 20°C Non Satisfactory
Electrical
Arc Resistance, sec 135 - 180
Dielectric Constant 2.3
Dielectric Strength, kV/mm 20 - 28
Dissipation Factor x 10-4 3 - 5
Volume Resistivity x 1015, Ohm.cm 16 - 18
Mechanical
Elongation at Break, % 150 - 600
Flexural Modulus (Stiffness), Gpa 1.2 - 1.6
Hardness Rockwell M 1 - 30
Hardness Shore D 70 - 83
Tensile Strength at Break, MPa 20 - 40
Tensile Strength at Yield, MPa 35 - 40
Toughness at Low Temperature, J/m 27 - 107
Toughness, J/m 20 - 60
Young's Modulus, GPa 1.1 - 1.6
Optical
Gloss, % 75 - 90
Haze, % 11
Transparency (Visible Light Transmission), % 85 - 90
Physical
Density, g/cm3 0.9 - 0.91
Gamma Radiation Resistance Poor
Glass Transition Temperature, °C -10
Shrinkage, % 1 - 3
Sterilization Resistance (Repeated) Poor
UV Light Resistance Fair
Water Absorption 24 hours, % 0.01 - 0.1
Service Temperature
Ductile / Brittle Transition Temperature, °C -20 - -10
HDT @0.46 Mpa (67 psi), °C 100 - 120
HDT @1.8 Mpa (264 psi), °C 50 - 60
Max Continuous Service Temperature, °C 100 - 130
Min Continuous Service Temperature, °C -20 - -10
Thermal
Coefficient of Linear Thermal Expansion x 10-5, /°C 6 - 17
Fire Resistance (LOI) 17 - 18
Flammability, UL94 HB
Thermal Insulation, W/m.K 0.15 - 0.21

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