Trifluorovinyl ether monomer TFVE

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. 

Our ongoing strategy to develop new fluorosilicone materials has been to combine the well known preparative chemistry of silicon containing compounds with the relatively new development of perfluorocyclobutane (PFCB) aromatic ether polymers. PFCB materials are prepared by the thermal cyclodimerization of trifluorovinyl ether (TFVE) monomers." " Recently we developed a synthetic... 

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