Acetal Polyoxymethylene Homopolymer - POM PTFE Lubricated

Polyoxymethylene is manufactured in both homopolymer and copolymer forms which are somewhat similar to each other. Both forms are hard, tough, and stiff polymers with good appearance (has a highly glossy surface) and excellent abrasion resistance.

They are generally opaque and highly crystalline. Although their natural color is white, they are often used colored. They show poor resistance to UV and generally to acids and alkalis.

When compared to the copolymer. The mechanical properties of the homopolymer is slightly better but its thermo-oxidative stability is somewhat worse. Only the copolymer is suitable for continuous use with hot water.

Polymer Type

Thermoplastic

Advantages

Advantages of Acetal Polyoxymethylene Homopolymer include low coefficient of friction compared to unmodified grades, good solvent resistance, as with homopolymer, and good hydrolytic stability.

Disadvantages

Reduced mechanical properties i.e. stiffness, strength and toughness, compared to unmodified homopolymer, poor resistance to acids, bases and UV radiation are some of the disadvantages of Acetal Polyoxymethylene Homopolymer.

Applications

Applications include gears, bearings, snap fittings, bearing bushes, conveyor belt components, sprockets, switch components, pulley wheels, and many other engineering components, plumbing fittings, appliance casings and jug kettles.

Typical Properties

Property Value
Density (g/cm3) 1.54
Surface Hardness RR118
Tensile Strength (MPa) 48
Flexural Modulus (GPa) 2.4
Notched Izod (kJ/m) 0.037
Linear Expansion (/°C x 10-5) 9
Elongation at Break (%) 12
Strain at Yield (%) 4
Max. Operating Temp. (°C) 90
Water Absorption (%) 0.2
Oxygen Index (%) 15
Flammability UL94 HB
Volume Resistivity (log ohm.cm) 16
Dielectric Strength (MV/m) 20
Dissipation Factor 1 kHz 0.009
Dielectric Constant 1 kHz 3.3
HDT @ 0.45 MPa (°C) 165
HDT @ 1.80 MPa (°C) 118
Material. Drying hrs @ (°C) 2 @ 90
Melting Temp. Range (°C) 210 - 230
Mould Shrinkage (%) 2.1
Mould Temp. Range (°C) 70 - 110

This information has been sourced, reviewed and adapted from materials provided by Dotmar EPP Pty Ltd.

For more information on this source, please visit Dotmar EPP Pty Ltd.

Citations

Please use one of the following formats to cite this article in your essay, paper or report:

  • APA

    Dotmar EPP Pty Ltd. (2019, April 29). Acetal Polyoxymethylene Homopolymer - POM PTFE Lubricated. AZoM. Retrieved on November 19, 2019 from https://www.azom.com/article.aspx?ArticleID=875.

  • MLA

    Dotmar EPP Pty Ltd. "Acetal Polyoxymethylene Homopolymer - POM PTFE Lubricated". AZoM. 19 November 2019. <https://www.azom.com/article.aspx?ArticleID=875>.

  • Chicago

    Dotmar EPP Pty Ltd. "Acetal Polyoxymethylene Homopolymer - POM PTFE Lubricated". AZoM. https://www.azom.com/article.aspx?ArticleID=875. (accessed November 19, 2019).

  • Harvard

    Dotmar EPP Pty Ltd. 2019. Acetal Polyoxymethylene Homopolymer - POM PTFE Lubricated. AZoM, viewed 19 November 2019, https://www.azom.com/article.aspx?ArticleID=875.

Tell Us What You Think

Do you have a review, update or anything you would like to add to this article?

Leave your feedback
Submit