Synthesis of fluorinated telechelics as precursors of well-defined fluoropolymers

摘要: The synthesis of fluorinated molecular or macromolecular telechelic compounds, whatever the position chain, has been developed over many years and continues to draw numerous investigations. This is because particularly interesting properties derivatives. Various synthetic methods are supplied achieve preparation such telechelics. driving force fluoropolymers lies on searched: if thermostable inert polymers required, it more convenient build a in which backbone while for expected good surface properties, wiser synthesize telechelics bearing perfluorinated side chain. Hence, former series, typical examples deal with introduction aromatic rings between chain chemical function improve thermal properties. More model fluoro-elastomers from these diiodides by means telomerisation. reaction can be used introduce key base units controlled way leading easily functionalized, well-architectured telomers. corresponding fluoro-aromatic exhibit glass transition temperatures higher than 200 oC, decomposition that reach 400 satisfactory softness represents weak point non-fluorinated products. It must taken into account much research still required groups modify reactivity negating its use certain syntheses. However, introducing adequate spacer protective gives hope preparations may successfully realized.