Bisphenol fluoropolymers

Bisphenol-cured fluoropolymers are usually analyzed by ODR. Reaction time and crosslinking density can be deduced from the ODR curve. 

Peroxide and bisphenol or diamine-cured systems are differentiated by the type of reaction of crosslinking. Bisphenols or diamines exhibit a dehydroflu-orination of the fluoropolymer backbone, followed by a Michael addition for the diamine, and a substitution of the fluorine atom for the bisphenols. The peroxide-cure reaction is a free radical attack, and so this system needs special cure site monomers. Another important crosslinking system that involves a technique requiring radicals is the radiation crosslinking. 

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