Materials Overview

PCTFE Properties

PCTFE or CTFE (originally known as Kel-F*) has many of the properties similar to other fluoropolymers such as PTFEFEP 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
Property Value Units Method
MECHANICAL PROPERTIES
Tensile Strength 4860 – 5710
34 – 39
psi
MPa
D 638
Elongation 100 – 250 % D 638
Flexural Strength, 73°F 9570 – 10300
66 – 71
psi
MPa
Flex Modulus 200 – 243 x 103
1.4 – 1.7
psi
MPa
Impact Strength, Izod, 23 deg C 2.5 – 3.5 ft-lb/in D 256
Compressive Stress at 1% deformation, 1570 – 1860
11 – 13
psi
MPa
D 695
Density 2.10 to 2.17 gm/cu.cm
THERMAL PROPERTIES
Coefficient of Linear Expansion 7 x 10-5 K-1
Melting Point 410 -414
210 – 212
deg F
deg C
Thermal Conductivity 1.45
0.84
Btu·in/h·ft2·°F
W/m·K
ASTM C 177
Specific Heat 0.22
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 Temperature 620
327
deg F
deg C
ELECTRICAL PROPERTIES
Dielectric Strength, short time, 0.004” 3000 Volt/mil D 149
Arc-Resistance 360 sec D 495
Volume Resistivity, @ 50% RH 2 x 1017 ohm-cm D 257
Surface Resistivity, @ 100% RH 1 x 1015 Ohm sq-1 D 257
Dielectric Constant, 1 kHz 2.6 ε D150-81
Dissipation Factor, @ 1 kHz 0.02 D150-81
OTHER PROPERTIES
Water Absorption 0.00 % increase in weight D570-81
Flame Rating+ Non-flammable D 635
Coefficient of friction D 1894
Specific Gravity 2.10 to 2.17 D792
Moisture Permeability Constant 0.2 g/m, 24 hours
O2 Permeability 1.5 x 10-10 Cc, cm/sq.cm, sec, atm
N2 Permeability 0.18 x 10-10 Cc, cm/sq.cm, sec, atm
CO2 Permeability 2.9 x 10-10 Cc, cm/sq.cm, sec, atm
H2 Permeability 56.4 x 10-10 Cc, 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.