Français
This is critical for determining performance stability and resistance to compression set at elevated temperatures.
Peroxide Curing Agents:
Why? Peroxide vulcanization forms C-C crosslinks, whose bond energy far exceeds that of C-S-C or S-S bonds formed by traditional sulfur vulcanization. C-C bonds exhibit superior thermal stability and resistance to thermal cracking and re-forming, resulting in exceptional heat resistance and compression set resistance.
Common Types: DCP (Diisopropylbenzene Peroxide), Di-2,5-dimethyl-2,5-bis(tert-butylperoxy)hexane (Di-2,5-dimethyl-2,5-bis(tert-butylperoxy)hexane). This is the preferred curing system for silicone rubber, EPDM, and many high-performance FKM/HNBR compounds. Special Vulcanizing Agents:
For fluorocarbon rubber, besides peroxides, bisphenol AF systems are used, offering exceptional high-temperature stability. Co-Crosslinking Agents:
Function: Used with peroxides to enhance crosslinking efficiency, improve physical properties (e.g., tear strength), and further reduce compression set. Common Types: TAIC (Triallyl Isocyanurate), TAC (Triallyl Cyanurate), HVA-2 (N,N'-Methylenebis(maleimide)), etc.
Common Types: DCP (Diisopropylbenzene Peroxide), Di-2,5-dimethyl-2,5-bis(tert-butylperoxy)hexane (Di-2,5-dimethyl-2,5-bis(tert-butylperoxy)hexane). This is the preferred curing system for silicone rubber, EPDM, and many high-performance FKM/HNBR compounds. Special Vulcanizing Agents:
For fluorocarbon rubber, besides peroxides, bisphenol AF systems are used, offering exceptional high-temperature stability. Co-Crosslinking Agents:
Function: Used with peroxides to enhance crosslinking efficiency, improve physical properties (e.g., tear strength), and further reduce compression set. Common Types: TAIC (Triallyl Isocyanurate), TAC (Triallyl Cyanurate), HVA-2 (N,N'-Methylenebis(maleimide)), etc.
