RANGE POLYPHENYLSULFONE - PPSU -
Characteristics of the PPSU
Very good thermal stability.
Superior resistance to steam and boiling water.
Good stability of electrical properties.
Good chemical resistance.
Resistant to combustion without additives.
PPSU has very good resistance to water, and
exceptional hydrolysis resistance.
Steam sterilisation is practically unlimited.
United States Pharmacopoeia – PPSU is
compliant with the conditions of Class VI and is
therefore appropriate for use in Class II as well as
medical devices in Class III.
PPSU has good electrical properties, practically
identical to PSU.
Good dielectric constant, which remains stable over the frequency range.
Good shear strength.
Exceptional impact resistance, Izod impact
resistance of 690 J/m.
PPSU has astonishingly good creep resistance,
even with increased temperatures.
Good notch resistance, superior to
Glass transition temperature (Tg) of 220°C.
Very good thermal stability, there is no significant
weight loss above 410°C, which is 50°C hotter
than its moulding temperature.
Good resistance to thermal ageing.
Heat conductivity of PPSU is 0.35 W/mK.
PPSU resists well against caustic aqueous
It resists well against chlorinated hydrocarbons.
Although PPSU demonstrates some resistance to
Ketones and ethers, it should not be used for
continuous, prolonged use.
PPSU is not seriously affected by organic
chemicals, except by ketones.
Of the inorganic chemicals, only concentrated
strong acids have a harmful effect.
Of the common functional fluids tested, only Skydrol 500A makes PPSU brittle.