ESCI 100 (Polymers)

Polymers

high molecular weight compounds obtained by repeated union of simple molecules

Monomers

• simple repetitive unit which when joined together in large numbers which give rise to a polymer

• building block of Polymer

Degree of Polemerization

a number, which indicates the number of repetitive units present in the polymer

Functionality

number of sites it has for bonding to other monomers under the given conditions of the polymerization reaction

Nomenclature of Polymers

1. Homo Polymers

2. Hetero Polymers

3. Homo chain Polymers

4. Hetero chain Polymers

Homo Polymers

made up of the with same type of monomers are called homo polymers

Hetero Polymers

made up of the different type of monomers are called hetero polymers

Homo chain Polymers

if the main chain consists of only one type of atoms called homo chain polymers

Hetero chain Polymer

if the main chain consists of different types on atoms called hetero chain polymers

Tacticity

difference in configuration due to the orientation of different functional groups with respect to the main chain is called tacticity

Isotactic

If all the functional groups are arranged on the same side of main chain is called isotactic

Syndiotactic

If all the functional groups are arranged in the alternative fashion of main chain is called Syndiotactic

Atactic

If all the functional groups are arranged in random of main chain is called atactic

Classification Based on Source

1. Natural Polymers

2. Semi-synthetic Polymers

3. Synthetic Polymers

Classification Based in Backbone of the Polymerchain

1. Organic Polymer

2. Inorganic Polymer

Classification Based on Structure of Polymers

1. Linear Polymer

2. Branched Polymer

3. Cross-linked Polymer

Classification Based on Composition of Polymer

1. Homopolymer

2. Copolymer

Classification Based on Mode of Polymerisation

1. Addition Polymer

2. Condensation Polymer

Classification Based in Molecular Forces

1. Elastomers

2. Fibers

3. Liquid Resins

4. Plastics

Types of Polymerization

1. Addition Polymerisation

2. Free radical Polymerization

3. Ionic Polymerisation

4. Cationic Polymerization

5. Anionic Polymerization

6. Coordination Polymerization