Types Of Polymerization Reactions
Chapter Name : Polymers |
Sub Topic Code : 102_12_15_03_01 |
Topic Name : Types Of Polymerization Reactions |
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Sub Topic Name : Addition Polymerization Or Chain Growth Polymerization |
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Introduction
1.The mode of polymerization is either through formation of free radicals or ionic species. 2.The free radical governed addition or chain growth polymerization is the most common mode for making polymers. 3.Free- radical mechanism : A variety of alkenes or dienes and their derivatives are polymerized in the presence of a free radical generating initiator (catalyst) like benzoyl peroxide, acetyl peroxide, tert-butyl peroxide, etc. 4.There are two types of polythene: low density polythene and high density polythene.
Pre-Requisites:
Elements, compounds, molecules
Activity:
1.Polymers are used to make: 2.Plastic buckets, Cups and saucers, Children’s toys, Packaging bags, Synthetic clothing materials, Automobile tires, Electrical insulating materials and machine parts.
Real Life Question:
How is plastic made?
Key Words / FlashCards
| Key Words | Definitions (pref. in our own words) |
|---|---|
| polymerization. | The process of formation of polymers from respective monomers |
Learning aids / Gadgets
| Gadgets | How it can be used |
|---|---|
| plastic | Plastic is a polymer |
Real life uses :
1.Polymers are used to make: 2.Plastic buckets, Cups and saucers, Children’s toys, Packaging bags, Synthetic clothing materials, Automobile tires, Electrical insulating materials and machine parts.
Places to visit :
Departmental store
Practical examples around us
| Examples | Explainations |
|---|---|
| Plastic toys, buckets | All are made of polymers |
What you learn in Theory:
1.The mode of polymerization is either through formation of free radicals or ionic species. 2.The free radical governed addition or chain growth polymerization is the most common mode for making polymers. 3.Free- radical mechanism : A variety of alkenes or dienes and their derivatives are polymerized in the presence of a free radical generating initiator (catalyst) like benzoyl peroxide, acetyl peroxide, tert-butyl peroxide, etc. 4.There are two types of polythene: low density polythene and high density polythene.
What you learn in Practice:
Polymers have a variety of uses