DX845 PMP Rod

DX845 PMP Rod combines excellent machinability with the high-performance characteristics of polymethylpentene, making it a strong choice for precision components. With an ultra-low density of ~0.833 g/cm³, it offers significant weight reduction compared to other engineering thermoplastics, without compromising mechanical stability. A melting point near 235–240 °C and exceptional chemical resistance allow it to maintain integrity in high-temperature or corrosive environments. Its low dielectric constant (~2.1) and high volume resistivity (~10¹⁶ Ω·cm) support use in electrical insulation for high-frequency and microwave applications. Industries such as aerospace, electronics, and biomedical engineering employ DX845 PMP Rod for custom-machined housings, precision insulating spacers, and lightweight structural components. It is especially valued for autoclavable medical fixtures, high-frequency waveguide parts, and chemically inert fittings in analytical equipment. This combination of lightweight strength, thermal resilience, and electrical insulation capability enables engineers and researchers to push the limits of component performance in advanced scientific and industrial systems.

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Tolerance

Properties

Reference & Citations

each

Tolerances

Rod

Diameter		+20% / -10%

Material Properties for Polymers

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