Chapter 21, Problem 75E

(a)

Interpretation Introduction

Interpretation:

The monomers involved in the making of Kevlar needs to be determined.

Concept Introduction :

Monomers are considered as small units of molecules which can link or react with other molecules to form large molecules called polymers. Its main feature is that it is polyfunctional indicating that it can form chemical bonds with other monomers. Kevlar is strong material and is used in bullet proof vest, boat construction, lightweight skies, mountaineering kits.

(b)

Interpretation Introduction

Interpretation:

The structure of Nomex polymer formed by reaction between monomers m-phenylene diamine and isophthaloyl chloride needs to be determined. The structural difference between Kevlar and Nomex needs to be explained.

Concept Introduction :

Monomers are small units of molecules that forms link with other monomer to form long chain bigger molecules called polymers. It has functionality of forming chemical bonds with other monomers. Nomex is a flame retardant material that is rigid and durable material.