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          Polyetherimide ( PEI )

          Material Information

          Buy Polyetherimide on-line

          We stock and supply the following standard forms:
          Film Granule Powder Rod Sheet Tube
          Film Granule Powder Rod Sheet Tube

          Choose a form to search our on-line catalogue  
          Common Brand Names:
          Ultem
           
          General Description:  

          General Description : An amorphous, transparent and amber high performance thermoplastic with the characteristics common to this group - see PEEK. Relative to PEEK it is less temperature resistant, less expensive and lower in impact strength. It is prone to stress cracking in chlorinated solvents.

          Applications include electrical switchgear, connectors and other components, microwaveable cookware and "under-bonnet" components.

             

          Chemical Resistance

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

          Electrical Properties

          Dielectric constant @1kHz 3.1
          Dielectric strength ( kV mm-1 ) 30 @ 1.6mm
          Dissipation factor @ 1MHz 0.0013 @ 1KHz
          Surface resistivity ( Ohm/sq ) 4.1013
          Volume resistivity ( Ohmcm ) 7.1015

          Mechanical Properties

          Abrasive resistance - ASTM D1044 ( mg/1000 cycles ) 10
          Compressive modulus ( GPa ) 2.9
          Compressive strength ( MPa ) 140
          Elongation at break ( % ) 60
          Hardness - Rockwell R125
          Izod impact strength ( J m-1 ) 50
          Poisson's ratio 0.44
          Tensile modulus ( GPa ) 2.9
          Tensile strength ( MPa ) 85

          Physical Properties

          Density ( g cm-3 ) 1.27
          Flammability V-0 @ 0.4mm
          Limiting oxygen index ( % ) 47
          Radiation resistance Good
          Resistance to Ultra-violet Good/Fair
          Water absorption - equilibrium ( % ) 1.3
          Water absorption - over 24 hours ( % ) 0.25

          Thermal Properties

          Coefficient of thermal expansion ( x10-6 K-1 ) 56
          Heat-deflection temperature - 0.45MPa ( C ) 200
          Heat-deflection temperature - 1.8MPa ( C ) 190
          Specific heat ( J K-1 kg-1 ) 2000
          Thermal conductivity @23C ( W m-1 K-1 ) 0.22
          Upper working temperature ( C ) 170-200

          Properties for Polyetherimide Film

          Property Value
          Dielectric Strength @25µm thick kV mm-1 254
          Dissipation Factor @1MHz 0.0023 @ 1KHz
          Elongation at Break % 15
          Permeability to Oxygen @25C x10-13 cm3. cm cm-2 s-1 Pa-1 0.01
          Permeability to Water @38C x10-13 cm3. cm cm-2 s-1 Pa-1 1
          Tensile modulus - Longitudinal GPa 2.5
          Tensile modulus - Transverse GPa 2.5
          Tensile strength - Longitudinal MPa 85
          Tensile strength - Transverse MPa 85
          Volume Resistivity Ohmcm 5.1015

          Buy Polyetherimide on-line

          We stock and supply the following standard forms:
          Film Granule Powder Rod Sheet Tube
          Film Granule Powder Rod Sheet Tube

          Choose a form to search our on-line catalogue  

          Index