Research Article
Compatibility Studies on Elastomers and Polymers with Ethanol Blended Gasoline
Table 6
Comparison of E10 versus E5 after 500 hours of immersion, by taking E5 as the reference data.
| | Material | Appearance | Weight change | Volume change | Hardness | Tensile | Elongation | | WET | DRY | WET | DRY | WET | DRY | WET | DRY | WET | DRY | WET | DRY |
| | Neoprene | Pitting | Pitting and brittle | +100% | No | +100% | No | Sample got decomposed/crumbled completely | | Nitrile | No | No | +100% | No | +100% | No | −4 units | No | −100% (2 MPa) | No | No | No | | HNBR | No | No | +100% | No | +100% | No | −13 units | No | −62% (5 MPa) | −33% (6 MPa) | No | −35% (70 mm) | | PVC/NBR | No | No | No | No | No | No | −11 units | No | −25% (2 MPa) | No | No | −35% (18 mm) |
| | Material | Appearance | Weight change | Volume change | Impact strength | Tensile | Elongation | Flexural |
| | Nylon-66 | Significant change | No | No | +74% (26 J/m) | No | No | −37% (3 MPa) | | Delrin | No | No | No | No | No | No | No |
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(−): decrease; (+): increase; No: no difference between E5 and E10 (within repeatability).
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