PPS (unfilled)
Polyphenylene Sulfide — semi-crystalline high-performance thermoplastic. Broadest chemical resistance of any engineering plastic — no known solvents below 200°C. Inherently flame-resistant (V-0 without additives, LOI 44%). Very low moisture absorption (<0.02%). Brittle in unfilled form — usually glass-fiber reinforced for structural use. Trade names include Ryton (Solvay), Fortron (Celanese), Torelina (Toray), Durafide (Polyplastics). Used for chemical pump components, filter bags, electrical insulation, and as base resin for GF40 compounds.
International equivalents
| Flag | Standard | Country | Grade | Number | Match |
|---|---|---|---|---|---|
| ISO | INT | PPS | — | REF | |
| 🇺🇸 | TRADE | USA | Ryton (Solvay) | — | 95% |
| 🇺🇸 | TRADE | USA | Fortron (Celanese) | — | 95% |
| 🇯🇵 | TRADE | Japan | Torelina (Toray) | — | 95% |
| 🇯🇵 | TRADE | Japan | Durafide (Polyplastics) | — | 95% |
Sources: ISO 10350, Solvay TDS, Celanese TDS, Toray TDS, Polyplastics TDS
Chemical composition comparison (wt%)
Side-by-side: PPS (unfilled) (COMPOSITION) (ISO 16396) vs Ryton (Solvay) (TRADE)
| Element | PPS (unfilled) (COMPOSITION) | Ryton (Solvay) (TRADE) | Overlap |
|---|---|---|---|
| Base Polymer (Polyphenylene Sulfide) | 99–99.9% | — | — |
Mechanical properties
Injection Molded
| Property | Value | Unit |
|---|---|---|
| Tensile Strength | 65–85 | MPa |
| Elongation | 3–6 | % |
| Elastic Modulus | 3.4–4 | GPa |
| Density | 1.34–1.36 | g/cm3 |
| Melting Point | ≥ 280 | °C |
| Glass Transition Temp (Tg) | 85–90 | °C |
| Continuous Use Temp | 200–220 | °C |
| Water Absorption (24h) | 0.01–0.02 | % |
Compatibility verdict
PPS (unfilled) and Ryton (Solvay): 95% composition match
Close equivalents but NOT identical.
Related materials
EPDM (Ethylene Propylene Diene Rubber)
Ethylene propylene diene monomer rubber — THE outdoor/weather elastomer. Saturated backbone gives outstanding ozone, UV, and weathering resistance. Excellent resistance to steam, hot water, and polar solvents. NOT resistant to oils/fuels (opposite of NBR). Good electrical insulation. ρ 0.85-1.3 (lightest common rubber). Used for automotive door/window seals, roofing membranes, radiator hoses, HVAC gaskets, and pond liners.
Epoxy/Carbon Fiber (CFRP)
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FKM (Fluoroelastomer / Viton)
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