Abstract:
A composition for preparing at least one of a polyimide and a poly(imide-amide) copolymer, the composition including at least one of a polyamic acid and a poly(amic acid-amide) copolymer, and at least one of a carbodiimide derivative and a carbodiimidazole derivative.
Abstract:
A poly(imide-amide) copolymer including a structural unit represented by Chemical Formula 1; a structural unit represented by Chemical Formula 2; and any one of a structural unit represented by Chemical Formula 3, an amic acid precursor of the structural unit represented by Chemical Formula 3, and a combination thererof; wherein a cured material of the poly(imide-amide) copolymer may have a tensile modulus of greater than or equal to about 5.5 GPa, and a yellowness index of less than or equal to about 5: wherein, groups and variables in Chemical Formulae 1 and 3 are the same as described in the specification.
Abstract:
A composition for preparing an article including a poly(imide-amide) copolymer, the composition including (i) a copolymer obtained by reacting a tetracarboxylic acid dianhydride represented by Chemical Formula 1, a diamine represented by Chemical Formula 2, and a carboxylic acid dichloride to form a reaction product, followed by removing hydrochloric acid from the reaction product, (ii) an acid anhydride, and (iii) a solvent: Wherein group R1 in Chemical Formula 1 and group R2 in Chemical Formula 2 are the same as described in the specification.