Polyphenylene sulfide

Polypheny­lene sul­fide (PPS) [Ryton®]

Prop­er­ties

  • Chemical-resistant
  • Absorbs min­i­mal moisture
  • Low coef­fi­cient of lin­ear ther­mal expansion
  • Ide­ally suited to precise-tolerance machined components
  • Grades include (1) 40% glass-reinforced PPS for excel­lent dimen­sional sta­bil­ity and ther­mal per­for­mance and (2) Bearing-grade PPS is inter­nally lubri­cated and car­bon fiber-reinforced for thrust or wear appli­ca­tions or when an elec­tri­cally con­duc­tive mate­r­ial is required
  • Many other grades avail­able in stock shape forms. Con­tact us for details.

Com­mon uses

  • Bear­ings
  • Bush­ings
  • Thrust wash­ers
  • Back-up for chevron packing
  • Pis­tons for fixed rod rec­i­p­ro­cat­ing gas compressors
Polyphenylene-sulfide

Polypheny­lene sulfide

Mate­r­ial Specifications

ASTM or UL test Prop­erty Glass-reinforced Bearing-grade
Phys­i­cal
D792 Den­sity (lb/in3)/(g/cm3) 0.061 (1.70) 0.056 (1.55)
D570 Water absorp­tion, 24 hrs (%) 0.02 0.02
Mechan­i­cal
D638 Ten­sile strength (psi) 13,000 10,000
D638 Ten­sile modulus 730,000 800,000
D638 Ten­sile elon­ga­tion at break (%) 2.0 1.5
D790 Flex­ural strength (psi) 23,000 15,000
D790 Flex­ural mod­u­lus (psi) 1,000,000 1,000,000
D785 Hard­ness, Rockwell 125 126
D256 Izod notched impact (ft-lb/in) 1.0 1.0
Ther­mal
D696 Coef­fi­cient of lin­ear ther­mal expan­sion
(x 10–5 in./in./°F)
2.5 1.7
D648 Heat deflec­tion temp (F°/C°) at 264 psi 490/254 490/254
D3418 Melt­ing temp (F°/C°) - -
- Max oper­at­ing temp (F°/C°) 450/232 450/232
C177 Ther­mal con­duc­tiv­ity
(BTU-in/ft²-hr-°F)
2.10 2.20
UL94 Flam­ma­bil­ity rating V-O V-O
Elec­tri­cal
D150 Dielec­tric con­stant at 1 MHz - -
D150 Dis­si­pa­tion fac­tor at 1 MHz - -
D149 Dielec­tric strength (V/mil) 385 -
D257 Vol­ume resis­tiv­ity (ohm/cm) at 50% RH 1018 -

These are typ­i­cal val­ues for ref­er­ence and com­par­i­son only. They should not be used as a basis for design spec­i­fi­ca­tions or qual­ity con­trol. Con­tact us for the man­u­fac­tur­ers’ com­plete mate­r­ial prop­erty datasheets. All val­ues were taken at 73°F (23°C) unless oth­er­wise noted.

Don’t see what you’re look­ing for? Call us at 800–423-2769 or email us at tom@crownplasticsinc.com.