Introduction
Polyphenylene Sulfide (PPS) is a semi-crystalline thermoplastic engineering polymer composed of alternating benzene rings and sulfur atoms in its molecular backbone, with the structural formula -[Ph-S]n- (Ph representing a phenyl ring). This unique combination of rigidity and stability has earned PPS the nickname “Plastic Gold.”

PPS Long Glass Fiber Reinforced

Four Core Properties of PPS
1. High Temperature Resistance
Heat Deflection Temperature (HDT):

≥260°C (unreinforced), with a continuous use temperature of up to 220°C.

Thermal Aging Resistance:

Maintains 80% or more of its mechanical strength even after 1,000 hours of exposure at 200°C.


2. Chemical Stability
Corrosion Resistance:

PPS resists acids, bases, and organic solvents (e.g., gasoline, ethanol). It corrodes only slowly in strong oxidizing media such as concentrated sulfuric or nitric acid.

Hydrolysis Resistance:

PPS exhibits excellent stability in high-temperature and high-pressure steam environments, making it ideal for extreme conditions such as deep-sea applications or chemically aggressive industrial environments.


3. Mechanical Performance
High Rigidity:

Pure PPS has a flexural modulus of about 3.8 GPa. When reinforced with glass fiber (e.g., PPS GF40), it can reach 12–15 GPa—comparable to aluminum alloys.

Wear Resistance:

With a low coefficient of friction (0.02–0.03), PPS significantly extends the lifespan of moving components like gears and bearings—by more than 30%.


4. Flame Retardancy & Electrical Properties
Flame Rating:

UL94 V-0 at 1.5 mm thickness, without the need for additional flame retardants.

Dielectric Strength:

18–22 kV/mm, making it an excellent insulator for high-frequency electronic components.