Plasticizer Migration: Why Your Rubber Parts Become Brittle Over Time
Problem Statement
Rubber components often fail prematurely due to plasticizer migration. This causes embrittlement, reduced elasticity, and compromised sealing performance. Common failure points include automotive seals, industrial gaskets, and hydraulic O-rings.
Material Science Analysis
Plasticizers are additives used to enhance flexibility in rubber compounds. Over time, these molecules migrate to the surface or leach into adjacent materials. This migration disrupts the polymer matrix, leading to increased hardness and reduced elongation. FKM (Fluorocarbon Rubber) resists plasticizer migration due to its high fluorine content and stable molecular structure. EPDM and NBR are more susceptible due to their lower chemical resistance.
Technical Specs
- Material: FKM (Fluorocarbon Rubber)
- Shore A Hardness: 70 ± 5
- Tensile Strength: 15 MPa
- Elongation at Break: 200%
- Temperature Range: -20°C to +200°C
- Compression Set: 15% (22 hours at 200°C)
- Chemical Resistance: Excellent against oils, fuels, and acids
Technical Comparison Table
| Parameter | FKM | EPDM | NBR |
|---|---|---|---|
| Shore A Hardness | 70 ± 5 | 60 ± 5 | 65 ± 5 |
| Tensile Strength (MPa) | 15 | 12 | 10 |
| Elongation at Break (%) | 200 | 300 | 250 |
| Temperature Range (°C) | -20 to +200 | -40 to +120 | -30 to +100 |
| Compression Set (%) | 15 | 25 | 30 |
| Chemical Resistance | Excellent | Good | Moderate |
Standard Compliance
RubberQ adheres to IATF 16949 standards for batch-to-batch consistency. Our in-house compounding ensures precise control over polymer ratios, fillers, and curing agents. Materials comply with ASTM D2000 for material callouts and ISO 3601 for sealing performance.
For custom material compound development or IATF 16949 documentation, consult RubberQ’s engineering department.
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