Question

Polyimides are polymers that are tough and stable at temperatures up to$\mathbf{4008}$C. They are used as a protective coating on the quartz fibers in fiber optics. What monomers are used to make the following polyimide

Short answer

Benzene- $1,4$-diamine and role="math" localid="1658147196568" $1,2,4,5$-tetra carboxybenzene are monomers that form this polyamide

Step-by-step solution

Step 1:To find the monomers

This polyamide is copolymer made of benzene- $\mathbf{1}\mathbf{,}\mathbf{4}$-diamine and $\mathbf{1}\mathbf{,}\mathbf{2}\mathbf{,}\mathbf{4}\mathbf{,}\mathbf{5}$-tetra carboxybenzene. In the polymerization reaction, two molecules of water are eliminated.

Hence Benzene- $1,4$-diamine and $1,2,4,5$-tetra carboxybenzene are monomers that form this polyamide