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Formula: PBT
Form: Rod
Material: Polybutylene terephthalate (PBT)
CAS Number: 24968-12-5
Commodity: Polymers
PBT Rods are part of our wide range of engineering plastic rods. PBT or polybutylene terephthalate, to give it its full name, is a semi-crystalline thermoplastic known for its dimensional stability, chemical resistance and electrical insulating properties. With 36 variations available, our PBT Rods come in multiple diameters and lengths to suit a wide range of applications. Example uses include electrical insulators, mechanical parts, and automotive components where heat and chemical resistance are required. Our PBT Rods provides engineers and designers with a versatile, high-performance thermoplastic material.
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Tolerances

Rod
Diameter +20% / -10%

Material Properties for Polymers

Chemical Resistance
Element Value
Acids - concentrated Good-Poor
Acids - dilute Good
Alcohols Good
Alkalis Fair
Aromatic hydrocarbons Good
Greases and Oils Good
Halogenated Hydrocarbons Good-Poor
Halogens Poor
Ketones Good-Poor
Electrical Properties
Element Value
Dielectric constant @1kHz 3.2
Dissipation factor @ 1kHz 0.002
Dielectric strength( kV mm⁻¹ ) 20
Volume resistivity( Ohmcm ) 10¹⁵
Physical Properties
Element Value
Flammability HB
Radiation resistance Good
Resistance to Ultra-violet Fair?
Limiting oxygen index( % ) 25
Water absorption - over 24 hours( % ) 0.1
Density( gcm⁻³ ) 1.31
Mechanical Properties
Element Value
Hardness - Rockwell M70
Elongation at break( % ) 250
Tensile modulus( GPa ) 2
Izod impact strength( J m⁻¹ ) 60
Tensile strength( MPa ) 50
Thermal Properties
Element Value
Heat-deflection temperature - 0.45MPa( C ) 150
Heat-deflection temperature - 1.8MPa( C ) 60
Upper working temperature( C ) 120
Specific heat( J K⁻¹ kg⁻¹ ) 1200-2300

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