Effect of barium sulphate and carbon black on thermal properties of fluoroelastomer compounds

The fluoroelastomers have the best heat stability of all rubbers. The most simple and commercially available fluoroelastomers are copolymers of vinylidene fluoride (VF)and hexafluoropropylene (HFP). High heat and oil resistance, self-extinguishing, relatively poor cold performance, high resistance to almost all inorganicchemicals except ammonia are the most common properties of these fluoroelastomers. Between several systems for curing fluoroelastomers bisphenol AF/ phosphonium salt [1-4] (B.AF/PSalt) is the most effective one for sealing applications. Fillers with bigger particle size such as MT blacks and BaSO4are used for improving thermal and mechanical properties of these materials, So the effect of adding them on hardness,curing and thermal properties of these materials has taken a huge concern. Therefore Hardness Shore A, curing curves and TGA of fluoroelastomer compounds containing different amounts of MT N990 and BaSO4 were investigated