PCTFE (POLYCHLOROTRIFLUOROETHYLENE)

PCTFE (POLYCHLOROTRIFLUOROETHYLENE)

Material Information

PCTFE is a thermoplastic that is produced by the polymerization of chlorotrifluoroethylene. It offers a unique combination of physical and mechanical properties, nonflammability, chemical resistance, very low moisture absorption, and excellent electrical properties. All of these characteristics are found over a useful temperature range (-400º F to 400º F). However, over 212º F a few solvents may dissolve the material or cause it to swell. It also has extremely low outgassing, which makes it a good option for aerospace and flight applications. It can be processed by compression molding or extrusion, and can be machined to precise tolerances. PCTFE is available in the form of rod, sheet, and tubing.

Application

  • Aircraft/Aerospace applications
  • Laboratory equipment components
  • Electronic/Electrical applications
  • Medical/Pharmaceutical applications
  • Valve seats
  • Seals
  • O-rings
  • Gaskets
  • Bearings

Properties

  • Excellent chemical resistance
  • Near zero moisture absorption
  • Low creep and cold flow
  • Ultraviolet stability
  • High optical transparency (thin films)
  • Continuous usage temperature of -400º F to 400º F
  • Low coefficient of thermal expansion
  • Excellent electrical insulator
  • Non-flammable
  • Very low outgassing

Physical

Astm Test Method

PCTFE

Density (lb/in^3) D792 0.077
Specific Gravity D792 2.13
Water Absorption @ 24 hours (%) D570  -

Mechanical

Tensile Strength (PSI) D638 5,300
Tensile Modulus (PSI) D638 207,000
Tensile Elongation at Break (%) D638 150
Flexural Strength (PSI) D790 8,500
Flexural Modulus (PSI) D790 180,000
Compressive Strength D695 5,500
Compressive Modulus (PSI) D695 180,000
IZOD Notched Impact (ft-lb/in) D256 5
Shore D Hardness D785 D90

Thermal

Coefficient of Thermal
Expansion, 10^-5/°F
D696 7
Heat Deflection Temperature 264 psi, ºF D648 258
Melting Point, °F D3418 415
Continous Service Temp (Operating), °F  - 270
Thermal Conductivity, BTU-in/hr-ft² °F C177 1.45
Flammability Rating UL94 VO

Electrical

Dielectric Strength, Short Term,
(Volts/Mil) @ .125″ Thick
D149 500
Volume Resistivity (ohm-cm) @ 50% RH D257 10^18
Dielectric Constant at 1 MHz D150 -
Dissipation Factor at 1 MHz D150 -

NOTE:

The information contained herein are typical values intended for reference and comparison purposes only. They should NOT be used as a basis for design specifications or quality control. Contact us for manufacturers' complete material property datasheets. All values at 73°F (23°C) unless otherwise noted.