Multiple choice

The reaction of dianhydrides with diamines gives ________.

  1. Aromatic polyimide

  2. Aromatic polysulfides

  3. Polyethersulfone (PES)

  4. Aromatic polyether

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A Correct answer
Explanation

Aromatic polyimide are synthesized by the reaction of dianhydrides with diamines, for example, pyromellitic anhydride with ''p''-phenylenediamine. It can also be accomplished using diisocyanates in place of diamines.