Chapter 8, Problem 8.1Q

Interpretation Introduction

Interpretation:

The polymerization processes which use water surrounding droplets of monomer should be mentioned.

Concept introduction:

Polymerization is the process or reaction in which small monomer units reacts with each other to form a large molecular unit, which is known as a polymer.

Answer to Problem 8.1Q

Suspension polymerization & emulsion polymerization process use water surrounding droplets of monomer.

Explanation of Solution

Polymerization is the process or reaction in which small monomer units reacts with each other to form a large molecular unit, which is known as a polymer.

For an example:

 

There are 4 major types of polymerization techniques as,

1. Bulk polymerization
2. Solution polymerization
3. Suspension polymerization
4. Emulsion polymerization

Suspension polymerization is a radical polymerization process. The reactant mixture is a heterogeneous mixture. So, a mechanical agitation is used to mix the monomers which are in a liquid phase.

Emulsion polymerization is also a free radical polymerization process. In this polymerization technique, monomers are polymerized in an aqueous surfactant solution.

During both suspension & emulsion polymerizations a liquid phase is used. To avoid using solvents, these 2 polymerization techniques use water to surround the tiny droplets of monomers.

Because of the use of this water phase, excellent heat conduction occurs throughout the reaction medium. Because of that, a good temperature control can be obtained. And also it fastens the polymerization rate.