| 摘要 |
Amorphous perfluorinated homopolymers and copolymers of perfluorodioxoles of formula (IA): <CHEM> wherein R'F is equal to RF or ORF wherein RF is a linear or branched perfluoroalkyl radical having 1-5 carbon atoms; X1 and X2, equal to or different from each other, are F, CF3; said polymers having a dioxole content ≥ 95% by moles, having the following property combination: Tg, measured according to the ASTM 3418 (DSC) method, from 180 DEG C to 195 DEG C; intrinsic viscosity, measured at the temperature of 30 DEG C in perfluoroheptane (Galden TM D80) according to the ASTM D 2857-87 method, from 13 cc/g to 100 cc/g. |
