|
 Chemical
Resistance of PEEK™
Properties
of PEEK (Polyetheretherketone)
More
on PEEKTM
|
| Chemical
Resistance of PEEK™ |
| PEEK
and Polymer chemical resistance |
|
PEEK
exhibits excellent resistance to a wide range of organic and
inorganic chemicals. The compatibility of PEEK with many chemicals
at 200C (680F) has been investigated
and the results for unreinforced grades are given in the table
below.
PEEK
is compatible with almost any of the solvents used in HPLC.
The
only solvents which will attack PEEK are concentrated nitric
acid and sulphuric acids. However, PEEK tubing can safely
withstand 20-30% nitric acid when passivating a system.
Methylene-chloride,
DMSO and THF may cause swelling in PEEK. The highest temperature
we recommend for PEEK is 100º centigrade. Up to this temperature
the tubing will maintain the pressure rating stated.
A
= Suitable
B
= Marginal-dependent on application
C = Not recommended
|
| The
Chemical resistance of PEEK at High Temperatures |
| Chemical |
Temperature
|
Rating
|
| Acetic
acid |
2000C (4200F)
|
B
|
| Ethylene
glycol |
2000C (4200F)
|
B
|
| Ethylene
glycol (50%) |
1400C (2840F)
|
A
|
| Methylethylketone |
2000C (4200F)
|
C
|
| Nltrobenzene |
2000C (4200F)
|
C
|
| Phosphoric
acid (50%) |
2000C (4200F)
|
A
|
| Sulphuric
acid (50%) |
2000C (4200F)
|
B
|
| Sodium
hydroxide solution |
2000C (4200F)
|
A
|
| Liquid
ammonia |
2000C (4200F)
|
A
|
| Sulphur
dioxide gas |
2000C (4200F)
|
A
|
| Hydrogen
sulphide gas |
2000C (4200F)
|
A
|
| Carbon
monoxide gas |
2000C (4200F)
|
A
|
| Ammonia
gas |
2000C (4200F)
|
A
|
| Methane |
2000C (4200F)
|
A
|
|
|
A
= Suitable
B = Marginal-dependent on application
C = Not recommended
|
| Resistance
at 20ºC |
PEEK
|
Poly-ethylene
|
Poly.- propylene
|
PVDF
|
Teflon
|
Tefzel
|
| Acetaldehyde |
A
|
|
|
|
|
|
| Acetic
acid(20%) |
A
|
A
|
A
|
A
|
A
|
A
|
| Acetic
acid (80%) |
A
|
A
|
A
|
B
|
A
|
|
| Acetic
acid (glacial) |
A
|
A
|
A
|
A
|
A
|
A
|
| Acetone |
A
|
B
|
A
|
C
|
A
|
A
|
| Acetonitrile |
A
|
|
|
|
A
|
A
|
| Acrylic
acid |
A
|
|
|
|
|
|
| Ammonia,
anhydrous |
A
|
|
|
|
|
|
| Ammonia(10%) |
A
|
B
|
A
|
A
|
A
|
A
|
| Ammonia
(liquid) |
B
|
|
|
|
|
|
| Ammonium
hydroxide |
A
|
A
|
A
|
A
|
A
|
A
|
| Aqua
regia |
C
|
|
|
|
|
|
| Aromatic
hydrocarbons |
A
|
B
|
C
|
|
|
|
| Benzene |
A
|
B
|
C
|
A
|
A
|
A
|
| Benzoic
acid |
A
|
|
|
|
|
|
| Benzaldehyde |
A
|
|
|
|
|
|
| Bromine
/ dibromoethane |
C
|
|
|
|
|
|
| Bromine
(dry) |
C
|
|
|
|
|
|
| Bromine
(wet) |
C
|
|
|
|
|
|
| Boric
acid |
A
|
|
|
|
|
|
| Butanol |
A
|
A
|
A
|
A
|
A
|
A
|
| Calcium
hydroxide |
A
|
|
|
|
|
|
| Carbon
tetrachloride |
A
|
|
|
|
|
|
| Chlorine
(gas) |
A
|
|
|
|
|
|
| Chorine
(liquid) |
C
|
|
|
|
|
|
| Chloroacetic
acid |
A
|
B
|
B
|
A
|
A
|
A
|
| Chlorobenzane |
A
|
|
|
|
|
|
| Chloroform |
A
|
B
|
B
|
A
|
A
|
A
|
| Cyclohexane |
A
|
B
|
C
|
A
|
A
|
A
|
| Cyclohexanone |
A
|
C
|
C
|
C
|
A
|
A
|
| Diethylamine |
A
|
C
|
A
|
C
|
A
|
A
|
| Diethylether |
A
|
|
|
|
|
|
| Diethylformamide |
A
|
A
|
A
|
C
|
A
|
A
|
| Dioxane |
A
|
|
|
|
|
A
|
| Ethanol |
A
|
B
|
A
|
|
A
|
A
|
| Ether |
A
|
B
|
C
|
B
|
A
|
A
|
| Ethylacetate |
A
|
B
|
A
|
C
|
A
|
A
|
| Ethylene
chloride |
|
B
|
B
|
A
|
A
|
A
|
| Ethylene
glycol |
A
|
A
|
A
|
A
|
A
|
A
|
| Heptane |
A
|
B
|
B
|
A
|
A
|
A
|
| Hexane |
A
|
B
|
B
|
A
|
A
|
A
|
| Hydrobromic
acid (100%) |
C
|
B
|
B
|
A
|
A
|
|
| Hydrobromic
acid (20%) |
C
|
B
|
A
|
A
|
A
|
A
|
| Hydrochloric
acid (100%) |
A
|
|
B
|
A
|
A
|
A
|
| Hydrochloric
acid (20%) |
A
|
A
|
B
|
A
|
A
|
A
|
| Hydrofluoric
acid (100%) |
C
|
|
B
|
A
|
A
|
A
|
| Hydrofluoric
acid (20%) |
|
A
|
A
|
A
|
A
|
A
|
| Hydrogen
peroxide(100%) |
A
|
B
|
B
|
A
|
A
|
|
| Hydrogen
peroxide (50%) |
A
|
B
|
B
|
A
|
A
|
A
|
| Hydrogen
peroxide (10%) |
A
|
A
|
A
|
A
|
A
|
A
|
| Iso-octane |
A
|
|
A
|
A
|
A
|
|
| Isopropanol |
A
|
A
|
A
|
|
A
|
|
| lsopropyl
ether |
|
A
|
B
|
C
|
A
|
|
| Ketones |
A
|
B
|
B
|
B
|
B
|
|
| Methanol |
A
|
A
|
A
|
A
|
A
|
A
|
| Methyl
dichloride |
|
|
C
|
C
|
|
|
| Methyl
ethyl ketone |
A
|
B
|
B
|
C
|
A
|
A
|
| Methylene
chlorlde |
A
|
B
|
B
|
B
|
A
|
A
|
Nitrlc
acid(100%)
|
C
|
B
|
C
|
C
|
A
|
A
|
| Nltric
acid(20%) |
A
|
B
|
A
|
A
|
A
|
A
|
| Pentane |
A
|
C
|
C
|
A
|
A
|
|
| Perchloric
acid |
A
|
B
|
B
|
A
|
A
|
|
| Phenol
(dilute) |
A
|
|
|
|
|
|
| Phenol
(conc,) |
C
|
|
|
|
|
|
| Phosphoric
acld(100%) |
A
|
B
|
A
|
B
|
A
|
A
|
| Phosphoric
acid(40%) |
A
|
A
|
A
|
B
|
A
|
A
|
| Potassium
hydroxide (dilute) |
A
|
|
|
|
|
|
| Potassium
hydroxide (70%) |
A
|
|
|
|
|
|
| Propanol |
A
|
|
|
|
|
|
| Pyridine |
A
|
B
|
A
|
C
|
A
|
A
|
| Sodium
hydroxide (80%) |
A
|
B
|
A
|
C
|
A
|
|
| Sodium
hydroxide (20%) |
A
|
A
|
A
|
A
|
A
|
A
|
| Sulphuric
acid (100%) |
C
|
B
|
B
|
A
|
A
|
A
|
| Sulphuric
acid (75%) |
C
|
A
|
A
|
A
|
A
|
A
|
| Sulphuric
acid (40%) |
A
|
A
|
A
|
A
|
A
|
A
|
| Tetrahydrofuren |
A
|
B
|
B
|
B
|
A
|
A
|
| Toluene |
A
|
B
|
B
|
A
|
A
|
A
|
| Trichloro
acetic acid |
A
|
A
|
A
|
B
|
A
|
A
|
| Trichloroethane |
A
|
|
B
|
A
|
A
|
|
| Trichloroethylene |
A
|
|
|
|
|
|
| Triethylamine |
|
|
C
|
A
|
A
|
A
|
| Water |
A
|
A
|
A
|
A
|
A
|
A
|
| Water(distilled) |
A
|
A
|
A
|
A
|
A
|
A
|
| Xylene |
A
|
|
|
|
|
|
| |
| Polyetheretherketone
(aka~PEEK™) |
|
Specific Gravity 1.32
Shrinkage,in/in,1/8 in. thick 0.0100
Shrinkage,in/in,1/4 in.thick 0.0140
Water Absorption,% 24hrs 0.150
MECHANICAL
Impact,Izod,Notched (Ft-Lb/In) 1.20
Impact,Izod,Unnotched(Ft-Lb/In) 16.00
Tensile Strength (Psi) 13,000
Tensile Elongation (%) 150.000
Tensile Modulus (Psi x E+6) 0.60
Flexual Strength (Psi) 17,500
Flexural Modulus (Psi x E+6) 0.50
Compressive Strength (Psi) NA
Hardness (Rockwell R) NA
ELECTRICAL
Dielectric Strength (V/Mil) 400
Dielectric Constant(@ 1 MC dry) 3.40
Dissipation Factor(@ 1 MC dry) 0.004
Arc Resistance (sec) 40
Volume Resistivity(ohm-cm)10E## 16.0
THERMAL
Heat Deflection Temp 264 psi(F) 340
Heat Deflection Temp 66 psi(F) NA
Flammability V0
Thermal Expansion (In/In/F)xE-5 3.000
Thermal Conductivity NA
WEAR
Wear Factor NA
U L yellow card NO
More
on PEEK
|
| Victrex
polyetheretherketone (PEEK) from Victrex, Ltd, Company,
England is a crystalline thermoplastic which makes it
a very chemically resistant product. PEEK operates in
a wide ph range, from 60% sulfuric acid to 40% sodium
hydroxide, and at high temperatures. Additional chemical
resistance includes the organic solvents, aqueous reagent,
and long term performance in superheated water at 500
degrees F. The heat distortion temperature for Victrex
is 600 degrees F, with continuous service possible at
464 degrees F. The high mechanical properties, very low
smoke emission and self extinguishing characteristics
bring PEEK in to numerous demanding applications, for
example: automotive engine parts; aerospace components;
compressor valve parts; bearings. PEEK is available in
rod and slab stock, as are all the HPM's highlighted above. |
| DIA. |
LB/FT |
| 3/8" |
0.062 |
| 1/2" |
0.111 |
| 5/8" |
0.173 |
| 3/4" |
0.249 |
| 7/8" |
0.339 |
| 1" |
0.443 |
| 1
1/4" |
0.692 |
| 1
1/2" |
0.996 |
| 1
3/4" |
1.36 |
| 2" |
1.77 |
| 2
1/4" |
2.24 |
| 2
1/2" |
2.77 |
| 2
3/4" |
3.35 |
| 3" |
3.98 |
| 3
1/2" |
5.42 |
| 4" |
7.08 |
| 4
1/2" |
8.96 |
| 5" |
11.07 |
| 6" |
15.73 |
|
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