TFVE functional silicones

TFVE Functional Silicones 4-6. Mono-olefin derivatives were reacted with a variety of commercial siloxane copolymers containing Si-H functionality by Pt(0) catalyzed hydrosilation methods. Polymer compositions containing varying amounts of TFVE were obtained based on the amount of Si-H linkages present in the copolymer (Figure 7). ... 

As mentioned earlier, exothermic polymerization of traditional trifluorovinyl ether monomers reach a measurable rate (DSC at 10 C/min) near 140°C and polymerizations are typically carried out at temperatures between 150-210°C. In contrast, the exothermic polymerization event for the crosslinking of TFVE functionalized silicones was delayed somewhat as expected due to the concentration of TFVE groups vs. traditional neat di- and trifunctional monomers. For example, DSC analysis (10°C/min) of reactive oligomer 11 exhibits an exothermic onset at 172°C and peak at 251°C. Selected thermal properties are summarized in Table 5. 

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