a. Draw a short segment of nylon 4.

b. Draw a short segment of nylon 44.

Nylon 4 comes under the category of polyamides. Several applications utilize polyamides. Its corrosion resistance character makes it employed in refineries and wastewater treatment plants.

a. Nylon-4 is a polymer of 4-aminobutanoic acid.

The reaction between two molecules of 4-aminobutamoic acid is given below.

The reaction between two molecules of 4-aminobutamoic acid

Hence, the short segment of nylon 4 is given below.

A short segment of nylon 4

b. Nylon-44 can be prepared by two different bifunctional monomers. The two different monomers are given below.

Monomers of nylon 44

The reaction between these monomers, butane-1,4-diamine and succinic acid is given below.

The reaction between the monomers

The molecule obtained above reacts n times to obtain the repeating unit of nylon 44. The reaction is given below.

Repeating unit of nylon-44

The short segment of nylon-44 is given below.

A short segment of nylon-44

The short segment of nylon-4 and nylon-44 are drawn.