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Unformatted text preview: determining the mixing torque. Before adding the crosslinking agent, the neat fluoroelastomer (neat-FC2260) exhibited the lowest mixing torque. The modified clay (FS-clay) filled FC2260 showed the highest mixing torque before crosslinking. After adding the crosslinking agent, the order of the mixing torque was completely different. The treated graphite (T-G) filled FC2260 showed the lowest mixing torque, implying T-G hindered crosslinking reaction of the FC2260. In contrast, the T-SiO 2 filled FC2260 exhibited the highest mixing torque due to the role of T-SiO 2 as a secondary crosslinking agent for the elastomer. Following T-SiO 2 , untreated silica (UT-SiO 2 ) and FS-clay led to the second and third highest mixing torque....
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- Spring '08