What is the Difference Between Sulfur and Peroxide Cure?
🆚 Go to Comparative Table 🆚The main difference between sulfur and peroxide cures lies in their properties, applications, and curing processes. Here is a comparison of the two:
Sulfur Cure:
- Lower temperature resistance: Sulfur-cured EPDM can resist temperatures up to 250°F (120°C).
- Higher tensile strength and tear strength: Sulfur-cured EPDM has greater strength in these areas compared to peroxide-cured EPDM.
- Allows for a wider range of fillers: Sulfur curing permits the use of a more diverse range of fillers in the rubber compound.
Peroxide Cure:
- Higher temperature resistance: Peroxide-cured EPDM can withstand temperatures up to 300°F (150°C).
- Good resistance to aging: Peroxide-cured EPDM has better resistance to aging compared to sulfur-cured EPDM.
- Lower compression set and improved resistance to chemicals and oils: Peroxide-cured EPDM has a lower compression set and better resistance to various chemicals and oils.
- Will not stain metals or PVC: Peroxide-cured EPDM does not cause staining on metals or PVC materials.
The choice of curing method depends on the specific end-use and application of the rubber compound. For example, peroxide-cured EPDM is more suitable for applications requiring higher temperature resistance and better resistance to chemicals and oils, while sulfur-cured EPDM is more appropriate for applications that need higher tensile strength, tear strength, and the ability to use a wider range of fillers.
Comparative Table: Sulfur vs Peroxide Cure
The difference between sulfur and peroxide cure lies in their temperature resistance, strength, and chemical properties. Here is a table summarizing the differences between sulfur-cured and peroxide-cured EPDM:
Property | Sulfur-Cured EPDM | Peroxide-Cured EPDM |
---|---|---|
Tensile Strength | Higher | Lower |
Tear Strength | Higher | Lower |
Temperature Resistance | Lower (up to 250°F / 120°C) | Higher (up to 300°F / 150°C) |
Compression Set | Higher | Lower |
Aging Resistance | Lower | Better |
Color and Appearance | May yellow or discolor | Better, less likely to bloom or discolor |
Chemical Resistance | Lower | Better, less likely to stain metals or PVC |
Filler Compatibility | Permits use of a wider range of fillers | Limited range of fillers |
Sulfur-cured EPDM has higher tensile strength, tear strength, and permits the use of a wider range of fillers. However, it has lower temperature resistance and inferior aging, color, and chemical resistance compared to peroxide-cured EPDM.
- Peroxide vs Hydrogen Peroxide
- Catalase vs Peroxidase
- Hydrogen Peroxide vs Carbamide Peroxide
- Peracetic Acid vs Hydrogen Peroxide
- Sulfite vs Sulfur Trioxide
- Sulfa vs Sulfur
- Sulfone vs Sulfoxide
- Sodium Hypochlorite vs Hydrogen Peroxide
- Hydrogen Peroxide vs Benzoyl Peroxide
- Chlorination vs Sulfonation
- Hydrogen Peroxide vs Rubbing Alcohol
- Witch Hazel vs Hydrogen Peroxide
- Copper Oxychloride vs Copper Sulphate
- Sodium Sulphate vs Sodium Sulphite
- Oleum vs Sulfuric Acid
- Sulfonate vs Sulfate
- Sulfur, Sulfate vs Sulfite
- Benzoyl Peroxide vs Salicylic Acid
- Sulfuric Acid vs Sulfurous Acid