
188 HIGH PERFORMANCE POLYMERS
Table 7.3 Properties of PES
a
Property Value Unit Standard
Density 1.29 gcm
−3
ASTM D792
Water absorption, 24 h 0.37 % ASTM D570
Water absorption, equilibrium 1.1 % ASTM D570
Tensile modulus 2.3 GPa ASTM D638
Tensile strength break 69.6 MPa ASTM D638
Tensile elongation yield 7.2 % ASTM D638
Tensile elongation break 60–120 % ASTM D638
Flexural modulus 2.4 GPa ASTM D790
Flexural strength 91.0 MPa ASTM D790
Notched Izod impact
b
690 Jm
−1
ASTM D256
Tensile impact strength 400 kJ m
−2
ASTM D1822
Glass transition temperature 220
◦
C ASTM E1356
Dielectric constant (60 Hz) 3.44 ASTM D150
Refractive index 1.672 ASTM D542
Oxygen index 38 % ISO 4589 ...