POLY(IMIDE-AMIDE)COPOLYMER, ARTICLE CONTATINING POLY(IMIDE-AMIDE)COPOLYMER, AND DISPLAY DEVICE INCLUDING SAME

摘要

The present invention relates to a poly(imide-amide) copolymer having a modulus of 5.5 GPa or more after curing and a yellow index (YI) of 3.5 or less. The poly(imide-amide) copolymer comprises: a structural unit represented by chemical formula 1, a structural unit represented by chemical formula 2, an amic acid precursor structural unit converted into the structural unit of chemical formula 2 by imidization, or a combination thereof; and a structural unit represented by chemical formula 3 or an amic acid precursor structural unit converted into the structural unit of chemical formula 3 by imidization. Chemical formulae 1-3 are the same as defined in the specification.