NEW OLIGOMERIC AMIC ACID AND POLYIMIDE NANOCOMPOSITES CONTAINING ORGANOPHILIC LAYERED SILICATES MODIFIED THEREFROM

摘要

The present invention relates to a polyimide nanocomposite containing a novel amic acid oligomer and a modified lipophilic layered silicate using the same, and more particularly to a diamine derivative and an aliphatic or aromatic tetracarboxylic dianhydride having a flexible side branch introduced therein. The new amic acid oligomer polymerized to introduce an amine group at the terminal, a lipophilic layered silicate modified by a cation exchange reaction by the amic acid oligomer, and the lipophilic layered silicate and polyimide resin or a precursor thereof The present invention relates to a polyimide nanocomposite having a composite, which has improved thermal stability such as thermal properties and thermal expansion coefficient.;Amic acid oligomers, lipophilic layered silicates, and polyimide nanocomposites in which amine groups are introduced at the terminals