Fluorine-containing rubbers copolymers

Three polymers, listed in Table 26.6, were selected for further work in which the effect on ITV of fillers, antioxidants and UV absorbers was to be examined. The effect of fillers was explored in the fluorine containing copolymer, the silicone copolymer and polyethylene polyethylene was selected for antioxidant and UV absorber study because of the three it is the most susceptible to oxidation. These results showed that there was a general deterioration compared with pure polymers, although hydrated alumina showed some benefit in polyethylene and silicone rubbers. However such results were not general - alumina hydrate for example deteriorates the performance of fluorine copolymers. The following tables summarize these effects. (Tables 26.6, 26.7, 26.8). 

As mentioned previously, interest in fluorine-containing copolymers has been particularly concerned with the development of rubbers. Many copolymers have been investigated but the bulk of the commercial production of fluoroelastomers is accounted for by vinylidene fluoride copolymers, of which those with hexafluoropropylene are the most important. Vinylidene fluoride-hexafluoropropylene copolymers were first introduced during the mid-1950 s. 

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