Chapter 21, Problem 81E

(a)

Interpretation Introduction

Interpretation:

The structure of polycarbonate chain formed by the reaction of bisphenol A and

phosgene needs to be determined.

Concept Introduction :

Polymerization is the process of combination of monomers through chemical bonds to form a network. Here smaller units of monomers having functional groups combine to form polymers. If the repeating monomer units are the same then it is homopolymer and if the monomers are two or more than two different monomer units, it is a copolymer.

(b)

Interpretation Introduction

Interpretation:

Whether the reaction to form polycarbonate polymer is a condensation or addition polymerization needs to be determined.

Concept Introduction :

When unsaturated carbon molecules or carbon molecules that have double bond ads results in polymers, it is said to be addition polymerization,

Condensation polymerization is process of forming polymers where molecules joins together and releases small molecules as by-products.