PPS (unfilled) vs PPS GF40: Same base polymer — GF40 triples stiffness but is very brittle
PPS (unfilled) vs PPS GF40
Side-by-side chemical composition and mechanical property comparison.
Overview
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.
PPS GF40
Polyphenylene Sulfide with 40% glass fiber — the ultimate under-hood engineering plastic. Service to 240°C continuous, inherently V-0 flame resistant without additives, near-zero moisture absorption (<0.02%), exceptional chemical resistance (comparable to PEEK/fluoropolymers). Trade names include Ryton R-4 (Solvay), Fortron 1140L4 (Celanese), Tedur (INEOS), TECATRON GF40 (Ensinger). Used for automotive water pump impellers, thermostat housings, EGR valves, LED reflectors, and semiconductor wafer carriers.
| PPS (unfilled) | PPS GF40 | |
|---|---|---|
| Material Number | — | — |
| Category | Polymers | Polymers |
| Standard | ISO 10350 | ISO 10350 |
Mechanical properties
| Property | PPS (unfilled) | PPS GF40 | Unit |
|---|---|---|---|
| tensile_strength | 65–85 | 150–185 | MPa |
| elongation | 3–6 | 1–2 | % |
| e_modulus | 3.4–4 | 13–15 | GPa |
Compatibility Assessment
PPS GF40 has 3x stiffness (E-Mod 14 vs 3.7 GPa) and 2x UTS (170 vs 75 MPa) but only 1.5% elongation vs 5%. Both have same chemical resistance and flame rating. Unfilled PPS used for films, fibers, coatings; GF40 for structural injection-molded parts.
Frequently Asked Questions
Is PPS (unfilled) the same as PPS GF40?
PPS (unfilled) and PPS GF40 have a 40% composition overlap. Same base polymer — GF40 triples stiffness but is very brittle
Can I replace PPS (unfilled) with PPS GF40?
Generally not recommended. The compositions differ significantly (40% overlap). These materials have different alloying concepts and are intended for different applications.
What is the difference between PPS (unfilled) and PPS GF40?
The main differences are in the following elements: overall alloying content. PPS (unfilled) is a Polymers grade, while PPS GF40 is a Polymers grade.
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