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Polyamide/imide ( PAI )

Material Information

Buy Polyamide/imide on-line

We stock and supply the following standard forms:
Rod Sheet Sphere
Rod Sheet Sphere

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Common Brand Names:
Kerimid, Torlon®
 
General Description:  

General Description : Amorphous, strongly colored, high performance polymers with linear predominantly aromatic molecules of high thermal stability. They are normally melt-processed but, after post-curing, are infusible in their fully finished form. If semi-fabricated items are machined, repeated post-curing is recommended if maximum properties are to be achieved. They have very good high temperature properties (approaching those of polyimides), good wear and radiation resistance, inherently low flammability and smoke emission and the highest strength of any unreinforced thermoplastic, but are very expensive and attacked by alkalis.

Applications include parts for internal combustion and jet engines, bearings and thrust washers and mechanical, electrical and electronic components.

   

Chemical Resistance

Acids - concentrated Fair-Poor
Acids - dilute Fair
Alcohols Good-Poor
Alkalis Poor
Aromatic hydrocarbons Good
Greases and Oils Good
Halogenated Hydrocarbons Good-Poor
Halogens Good-Poor
Ketones Good

Electrical Properties

Dielectric constant @1MHz 3.9-5.4
Dielectric strength ( kV mm-1 ) 23 at 1mm
Dissipation factor @ 1MHz 0.03-0.042
Surface resistivity ( Ohm/sq ) 8-50 x 1017
Volume resistivity ( Ohmcm ) 0.08-2 x 1017

Mechanical Properties

Compressive strength ( MPa ) 170-220
Elongation at break ( % ) 7-15
Hardness - Rockwell E72-86
Izod impact strength ( J m-1 ) 60-140 - notched
Poisson's ratio 0.38
Tensile modulus ( GPa ) 4.5-6.8
Tensile strength ( MPa ) 110-190

Physical Properties

Density ( g cm-3 ) 1.42-1.46
Flammability V0
Limiting oxygen index ( % ) 44-45
Radiation resistance Good
Resistance to Ultra-violet Good
Water absorption - equilibrium ( % ) 3-4
Water absorption - over 24 hours ( % ) 0.3

Thermal Properties

Coefficient of thermal expansion ( x10-6 K-1 ) 25-31
Heat-deflection temperature - 1.8MPa ( C ) 278-9
Lower working temperature ( C ) =< -200
Specific heat ( J K-1 kg-1 ) 1000
Thermal conductivity @23C ( W m-1 K-1 ) 0.26-0.54
Upper working temperature ( C ) 200-260

Buy Polyamide/imide on-line

We stock and supply the following standard forms:
Rod Sheet Sphere
Rod Sheet Sphere

Choose a form to search our on-line catalog  

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