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Polychlorotrifluoroethylene ( PCTFE )

Material Information

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Common Brand Names:
Kel-F, Neoflon
 
General Description:  

General Description : An expensive, semi crystalline, melt processable thermoplastic. It has a chemical structure similar to that of PTFE but with one chlorine atom substituted for a fluorine atom in the repeat group. PCTFE offers a unique combination of physical and mechanical properties, non-flammability, high optical transparency, chemical resistance, near zero moisture absorption and excellent electrical properties. PCTFE also has extremely low outgassing (0.01% TML, 0.00% CVCM, 0.00% WVR when tested per ASTM E-595-90) and so is suitable for use in aerospace and flight applications.

Industrial applications include chemical apparatus, process equipment, cryogenic applications, valve seats, seals, gaskets, sight glasses (special process), laboratory equipment, medical equipment, gears, cams and bearings.

   

Chemical Resistance

Acids - concentrated Good
Acids - dilute Good
Alcohols Good
Alkalis Good
Aromatic hydrocarbons Good
Greases and Oils Good
Halogens Good
Ketones Good

Electrical Properties

Dielectric constant @1MHz 2.24-2.8
Dielectric strength ( kV mm-1 ) 14
Dissipation factor @ 1kHz 0.023-0.027
Dissipation factor @ 1MHz 0.01
Surface resistivity ( Ohm/sq ) 1015
Volume resistivity ( Ohmcm ) 1016

Mechanical Properties

Compressive strength ( MPa ) 9-12
Elongation at break ( % ) 80-250
Hardness - Rockwell R75-112 D75-90 - Shore
Izod impact strength ( J m-1 ) 267
Tensile modulus ( GPa ) 1.3-1.8
Tensile strength ( MPa ) 31-41

Physical Properties

Density ( g cm-3 ) 2.10 - 2.14
Flammability V-0
Refractive index 1.435
Water absorption ( % ) <0.01

Thermal Properties

Coefficient of thermal expansion ( x10-6 K-1 ) 70
Heat-deflection temperature - 0.45MPa ( C ) 126
Lower working temperature ( C ) -240
Specific heat ( J K-1 kg-1 ) 900
Thermal conductivity @0.13C ( W m-1 K-1 )
Upper working temperature ( C ) 120-149

Properties for Polychlorotrifluoroethylene Film

Property Value
Permeability to Carbon Dioxide @25C x10-13 cm3. cm cm-2 s-1 Pa-1 0.16
Permeability to Hydrogen @25C x10-13 cm3. cm cm-2 s-1 Pa-1 0.7
Permeability to Nitrogen @25C x10-13 cm3. cm cm-2 s-1 Pa-1 0.004
Permeability to Oxygen @25C x10-13 cm3. cm cm-2 s-1 Pa-1 0.03
Permeability to Water @25C x10-13 cm3. cm cm-2 s-1 Pa-1 0.22
Permeability to Water @38C x10-13 cm3. cm cm-2 s-1 Pa-1 1
All information and technical data are given as a guide only. Although every effort has been made to ensure that the information is correct, no warranty is given as to its completeness or accuracy.

Buy Polychlorotrifluoroethylene on-line

Standard products are available in these forms
Rod Sheet
Rod Sheet

Choose a form to search our on-line catalog  

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