PCTFE Properties

PCTFE or CTFE (originally known as Kel-F*) has many of the properties similar to other fluoropolymers such as PTFE, FEP or PFA, but is mechanically superior in rigidity (does not deform easily), and has very low gas permeability . Its dimensional stability makes it attractive for use as a component of a structural part where the high temperature and chemical resistance of fluoropolymers is required. PCTFE shows high compressive strength and low deformation under load. However, its relative cost is one of the major considerations in its selection, since it is quite expensive.

PCTFE – Poly (chloro trifluoro ethylene) TYPICAL PROPERTIES
PropertyValueUnitsMethod
MECHANICAL PROPERTIES
Tensile Strength4860 - 5710
34 - 39
psi
MPa
D 638
Elongation100 - 250%D 638
Flexural Strength, 73°F9570 - 10300
66 - 71
psi
MPa
Flex Modulus200 – 243 x 103
1.4 – 1.7
psi
MPa
Impact Strength, Izod, 23 deg C2.5 – 3.5ft-lb/inD 256
Compressive Stress at 1% deformation,1570 – 1860
11 - 13
psi
MPa
D 695
Density2.10 to 2.17gm/cu.cm
THERMAL PROPERTIES
Coefficient of Linear Expansion7 x 10-5K-1
Melting Point410 -414
210 - 212
deg F
deg C
Thermal Conductivity1.45
0.84
Btu·in/h·ft2·°F
W/m·K
ASTM C 177
Specific Heat0.22
0.92
Btu/lb/deg F
kJ/Kg/deg K
Heat Distortion Temperature, 66 lb/sq.in (0.455 MPa)259
126
deg F
deg C
D 648
Processing Temperature620
327
deg F
deg C
ELECTRICAL PROPERTIES
Dielectric Strength, short time, 0.004”3000Volt/milD 149
Arc-Resistance360secD 495
Volume Resistivity, @ 50% RH2 x 1017ohm-cmD 257
Surface Resistivity, @ 100% RH1 x 1015Ohm sq-1D 257
Dielectric Constant, 1 kHz2.6εD150-81
Dissipation Factor, @ 1 kHz0.02 D150-81
OTHER PROPERTIES
Water Absorption0.00% increase in weightD570-81
Flame Rating+Non-flammable D 635
Coefficient of friction D 1894
Specific Gravity2.10 to 2.17 D792
Moisture Permeability Constant0.2g/m, 24 hours
O2 Permeability1.5 x 10-10Cc, cm/sq.cm, sec, atm
N2 Permeability0.18 x 10-10Cc, cm/sq.cm, sec, atm
CO2 Permeability2.9 x 10-10Cc, cm/sq.cm, sec, atm
H2 Permeability56.4 x 10-10Cc, cm/sq.cm, sec, atm

+ Numerical rating for flame spread is not intended to reflect hazards presented by this or any other material under actual fire conditions

NOTE: The information, recommendations and opinions contained herein is only a guide and is intended solely for your consideration, inquiry and verification. The suitability of any material under specific conditions of application is not guaranteed in any manner. Fluorotherm™ Polymers Inc does not assume legal responsibility for the use of data presented here in any form, under any circumstances, any application, test or communication. Nothing contained herein is to be interpreted as a license or authorization to operate under or infringe any patent.

Technical Info