
6: POLY(ARYL ETHER KETONE)S 159
Table 6.3 (Continued)
Chemical 20
◦
C 60
◦
C 100
◦
C
Phenol R R ND
Sea water R R R
Sulfur dioxide, dry R R R
Sulfur trioxide R R R
Sulfuric acid (70%) R R R
Sulfuric acid (95%) NR NR NR
Sulfuric acid, fuming NR NR NR
R: Resistant; LR: Limited resistant; NR: Not recommended; ND:
No data.
Table 6.4 Time Averaged Friction Coefficients
as a Function of PEEK Content in PTFE [29]
PEEK in PTFE % Friction Coefficient
¯
µ
0 0.135
50 0.111
100 0.353
the melt viscosity increases and the polymer proper-
ties suffer. As the exposure time in the melt lengthens,
melt fabrication becomes progressively more difficult.
Non-hydrolyzable divalent metal oxides