AMORPHOUS PERFLUORINATED HOMOPOLYMER OR COPOLYMER COMPRISING PERFLUORODIOXOL AND HAVING HIGH GLASS TRANSITION TEMPERATURE AND SPECIFIC INTRINSIC VISCOSITY, ITS PREPARATION METHOD, AND ITS USE

摘要

PURPOSE: Provided are an amorphous perfluorinated homopolymer or copolymer which has a high glass transition temperature (Tg), a specific range of intrinsic viscosity and excellent mechanical properties, and its preparation method and its use for preparing a coating, a film or a layer. CONSTITUTION: The amorphous perfluorinated homopolymer or copolymer comprises 95 mol% or more of a perfluorodioxol represented by the formula IA, wherein R'_F is R_F or OR_F; R_F is a C1-C5 linear or branched perfluoroalkyl radical; and X1 and X2 are identical or different each other and are F or CF3. The amorphous perfluorinated homopolymer or copolymer has a Tg of 180-195 deg.C when measured according to ASTM 3418(DSC) and an intrinsic viscosity of 13-100 cc/g at 30 deg.C when measured in perfluoroheptane according to ASTM D 2857-87.