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Plastics & Elastomers
Polyacetal: Detailed Information on POM and Its Features

Properties of Different Types of POM Resins

Keeping information about the properties of a thermoplastic beforehand is always beneficial. This helps in selecting the right engineering thermoplastic for a particular application. It also assists in evaluating if the end use requirement would be fulfilled or not. Compare all relevant properties of several POM Grades (Unreinforced, Impact-modified, Low-Friction, Mineral Filled). From physical properties, dimensional stability, electrical performances to fire and thermal properties, find out every possible attribute with its values here.

Overview

Key Applications

Key Properties

Property UNREINFORCED POM IMPACT MODIFIED POM LOW FRICTION POM MINERAL FILLED POM
Chemical Resistance
Acetone @ 100%, 20°C Limited Limited Limited Limited
Ammonium hydroxide @ 30%, 20°C Satisfactory Satisfactory Satisfactory Satisfactory
Ammonium hydroxide @ diluted, 20°C Satisfactory Satisfactory Satisfactory Satisfactory
Ammonium hydroxide @ diluted, 60°C Satisfactory Satisfactory Satisfactory Satisfactory
Aromatic hydrocarbons @ 20°C Limited Limited Limited Limited
Benzene @ 100%, 20°C Satisfactory Satisfactory Satisfactory Satisfactory
Ethyleneglycol (Ethane diol) @ 100%, 20°C Limited Limited Limited Limited
Ethyleneglycol (Ethane diol) @ 100%, 50°C Limited Limited Limited Limited
Gasoline Satisfactory Satisfactory Satisfactory Satisfactory
Glycerol @ 100%, 20°C Satisfactory Satisfactory Satisfactory Satisfactory
Grease @ 20°C Satisfactory Satisfactory Satisfactory Satisfactory
Hydrogen peroxide @ 30%, 60°C Non Satisfactory Non Satisfactory Non Satisfactory Non Satisfactory
Kerosene @ 20°C Satisfactory Satisfactory Satisfactory Satisfactory
Methanol @ 100%, 20°C Satisfactory Satisfactory Satisfactory Satisfactory
Methylethyl ketone @ 100%, 20°C Limited Limited Limited Limited
Mineral oil @ 20°C Satisfactory Satisfactory Satisfactory Satisfactory
Phenol @ 20°C Non Satisfactory Non Satisfactory Non Satisfactory Non Satisfactory
Silicone oil @ 20°C Limited Limited Limited Limited
Sodium hydroxide @ 10%, 20°C Satisfactory Satisfactory Satisfactory Satisfactory
Sodium hydroxide @ 10%, 60°C Limited Limited Limited Limited
Sodium hypochlorite @ 20%, 20°C Non Satisfactory Non Satisfactory Non Satisfactory Non Satisfactory
Strong acids @ concentrated, 20°C Non Satisfactory Non Satisfactory Non Satisfactory Non Satisfactory
Toluene @ 20°C Satisfactory Satisfactory Satisfactory Satisfactory
Toluene @ 60°C Satisfactory Satisfactory Satisfactory Satisfactory
Xylene @ 20°C Satisfactory Satisfactory Satisfactory Satisfactory
Butylacetate @ 100%, 20°C Satisfactory Satisfactory Satisfactory Satisfactory
Chlorinated solvents @ 20°C Limited Limited Limited Limited
Chloroform @ 20°C Non Satisfactory Non Satisfactory Non Satisfactory Non Satisfactory
Dioctylphtalate @ 100%, 20°C Limited Limited Limited Limited
Ethanol @ 96%, 20°C Satisfactory Satisfactory Satisfactory Satisfactory
Electrical
Arc Resistance, sec 200-220 120 126-183 -
Volume Resistivity x 1015, Ohm.cm 14-15 15-16 15-16 -
Dielectric Constant 3.3-4.7 4-4.3 3-4 -
Dielectric Strength, kV/mm 13.8-20 19 16 -
Dissipation Factor x 10-4 50-110 50-250 20-90 -
Mechanical
Flexural Modulus, Gpa 2.8-3.7 1.4-2.3 2-3 4-5.5
Hardness Rockwell M 75-94 35-79 58-94 83-90
Hardness Shore D 80-95 80-92 80-94 92-95
Strength at Break (Tensile), MPa 60-70 45-60 50-70 50-75
Strength at Yield (Tensile), MPa 54-78 35-50 48-69 54-78
Toughness at Low Temperature, J/m 53-250 - 32-53 -
Toughness, J/m 60-120 90-250 25-60 50-65
Young's Modulus, GPa 2.8-3.7 1.4-2.3 1.8-3 4-5.5
Elongation at Break, % 15-75 60-200 10-70 5-55
Elongation at Yield, % 8-23 10-15 - -
Physical
Gamma Radiation Resistance Fair Fair Fair Fair
Glass Transition Temperature, °C -60--50 - - -
Shrinkage, % 1.8-2.5 1-2.5 1.8-3 1.5-2
Sterilization Resistance (Repeated) Poor Poor Poor Poor
UV Light Resistance Poor Poor Poor Poor
Water Absorption 24 hours, % 0.15-0.5 0.3-0.5 0.2-0.27 0.2-0.5
Density, g/cm3 1.41-1.42 1.3-1.35 1.4-1.54 1.5-1.6
Service Temperature
HDT @0.46 Mpa (67 psi), °C 158-172 145-165 168-172 158-175
HDT @1.8 Mpa (264 psi), °C 110-136 64-90 118-136 100-140
Max Continuous Service Temperature, °C 80-105 80-100 80-105 80-105
Min Continuous Service Temperature, °C -40 -50--40 -40 -
Ductile / Brittle Transition Temperature, °C -40 -50--40 -40 -
Thermal
Fire Resistance (LOI), % 18 18 - -
Flammability, UL94 HB HB HB HB
Thermal Insulation, W/m.K 0.31-0.37 - 0.31 -
Coefficient of Linear Thermal Expansion x 10-5, /°C 10-15 12-13 10-12 8-9

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1 Comments on "Polyacetal 101: Detailed Information on POM Resin and Its Features"
David R Aug 3, 2022
Very good article

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