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Grade: RT18
Formula: PMP TPX®
Form: Rod
Material: Polymethylpentene (PMP, TPX™)
Commodity: Polymers

RT18 PMP Rod

Our range of RT18 PMP Rods are a thermoplastic material made from polymethylpentene (PMP). This is known for its high impact strength, low density and excellent chemical resistance. These rods are commonly used for machined parts, bearings, rollers and wear strips across industrial, chemical and food processing applications, where durability, weight savings and corrosion resistance are required. With 72 size options available, our PMP rods offer versatile solutions for prototyping and production needs.
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Tolerances

Rod
Diameter +20% / -10%

Material Properties for Polymers

Chemical Resistance
Electrical Properties
Physical Properties
Mechanical Properties
Thermal Properties
Chemical Resistance
Element Value
Acids - concentrated Good-Fair
Acids - dilute Good
Alcohols Good
Alkalis Good
Aromatic hydrocarbons Fair-Poor
Greases and Oils Good-Fair
Halogenated Hydrocarbons Fair-Poor
Halogens Fair-Poor
Ketones Good-Fair
Electrical Properties
Element Value
Dielectric constant @1MHz 2.12
Dissipation factor @ 1kHz 0.0002
Volume resistivity( Ohmcm ) >10¹⁶
Physical Properties
Element Value
Flammability HB
Refractive index 1.463
Resistance to Ultra-violet Poor
Limiting oxygen index( % ) 17
Water absorption - over 24 hours( % ) 0.01
Density( gcm⁻³ ) 0.835
Mechanical Properties
Element Value
Hardness - Rockwell R85
Elongation at break( % ) 15
Tensile modulus( GPa ) 1.5
Izod impact strength( J m⁻¹ ) 49
Tensile strength( MPa ) 25.5
Thermal Properties
Element Value
Heat-deflection temperature - 0.45MPa( C ) 100
Heat-deflection temperature - 1.8MPa( C ) 40
Lower working temperature( C ) 20
Upper working temperature( C ) 75-115
Specific heat( J K⁻¹ kg⁻¹ ) 2000
Thermal conductivity( W m⁻¹ K⁻¹ ) 0.17@23°C
Coefficient of thermal expansion( x10⁻⁶ K⁻¹ ) 117

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