Page 319 - Engineering Plastics Handbook
P. 319
Polyamide-imide (PAI) 277
20
Torlon
120
15
100
Tensile strength, kpsi 10 80 Tensile strength, MPa
60
5 40
20
0 0
7130 5030 PES PEEK PEI PPS
Figure 12.17 Tensile strengths of reinforced Torlon resins surpass competitive rein-
forced resins at 204 °C.
As noted before, polyamide-imide requires a thermal cure cycle to
achieve its full properties. In its “green” or uncured state, polyamide-imide
possesses significantly lower mechanical, chemical, and wear character-
istics. During the cure cycle, molecular weight increases, the remaining
amic acids cycle, and cross-linking reactions occur, rendering the polymer
insoluble in solvents such as NMP and no longer melt-processable.
Torlon
30
200
Flexural strength, kpsi 20 150 Flexural strength, MPa
100
10
50
0 0
7130 5030 PES PEEK PEI PPS
Figure 12.18 Flexural strengths of reinforced Torlon resins surpass competitive rein-
forced resins at 400°F (204°C).
