POLYIMIDE FILM HAVING IMPROVED THERMAL AND MECHANICAL PROPERTIES AND MANUFACTURING METHOD THEREOF

摘要

The present invention relates to a transparent polyimide film, which improves transmittance and achromatism by introducing a sulfonic group or an ether group while eliminating trifluoromethyl (CF_3), which has disadvantage of generating environmental problems and being expensive from the molecule, and which minimizes deterioration in heat resistance and mechanical properties by introducing an amide group, and thus having reinforced thermal and mechanical properties, and having excellent transparency by having 88% or more of transmittance in a film, not less than 4.0 and lower than 5.5 of achromatism, 250-270 of Tg, 105 or more of strength, and not less than 8% and less than 15% of ductility.;COPYRIGHT KIPO 2017