FTIR and NMR Studies on Crosslinking Reaction between Chlorosulfonated Polyethylene and Epoxidized Natural Rubber

A blend of chlorosulfonated polyethylene and epoxidized natural rubber undergoes a self-crosslinking reaction at elevated temperatures. Sulfonyl chloride groups of chlorosulfonated Polyethylene react with epoxy groups of epoxidized natural rubber to give ether crosslinks between the two polymers. In addition to the self-crosslinking reaction, these two polymers undergo a number of side reactions as evidenced by spectroscopic studies.