Property	Parameter/Performance	Remarks
Chemical Name	Polyphenylene Sulfide	Alternating benzene rings and thioether (-S-) backbone
Molecular Structure	Semi-crystalline thermoplastic (50-65% crystallinity)	Linear PPS (heat-resistant) vs. branched PPS (high-flow)
Density	1.34~1.36 g/cm³	20% lighter than PEEK
Color	Natural amber (black/gray dyeable)	Opaque, high surface gloss
Mechanical Properties
– Tensile Strength	65-85 MPa (dry)	Up to 200 MPa with glass fiber reinforcement
– Impact Strength	5-8 kJ/m² (notched Izod)	Retains 80% strength at -40℃
– Wear Resistance	PV limit >3 MPa·m/s	Superior self-lubrication vs. most engineering plastics
Thermal Properties
– HDT (1.82MPa)	260-280℃	Highest long-term service temp among engineering plastics
– Service Temperature	-40℃~220℃ (short-term 260℃)	UL RTI 220℃ (electrical)
Chemical Properties
– Chemical Resistance	Resists acids/alkanes/organic solvents below 200℃	Only dissolves in concentrated HNO₃/H₂SO₄
– Flammability	UL94 V0 (1.5mm, no additives)	LOI 44% (non-flammable)

Type	Characteristics	Typical Applications
Neat Resin PPS	High purity, excellent electricals	IC substrates, insulating films
40% Glass-Filled PPS	Flexural strength >250 MPa	Turbocharger components, pump housings
Carbon-Fiber PPS	Thermal conductivity 1.5 W/mK	Semiconductor thermal management parts
Wear-Resistant PPS	PTFE/graphite additives	Bearing cages, compressor vanes
Conductive PPS	Carbon black/fiber (10²-10⁴ Ω·cm)	Anti-static wafer carriers

Advantages	Disadvantages
Best-in-class heat resistance (220℃ long-term)	Brittle (requires reinforcement)
Inherently flame-retardant (halogen-free V0)	High processing energy (>300℃ melt)
Exceptional chemical resistance	Expensive (3-5× PA66 cost)

PPS

Basic Properties