Types Of Polymerization Reactions
Chapter Name : Polymers |
Sub Topic Code : 102_12_15_03_04 |
Topic Name : Types Of Polymerization Reactions |
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Sub Topic Name : Rubber |
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Introduction
1.Rubber also called elastomer is a natural polymer and possesses elastic properties. 2.It is manufactured from rubber latex which is a colloidal dispersion of rubber in water. 3.This latex is obtained from the bark of rubber tree and is found in India, Sri Lanka, Indonesia, Malaysia and South America. 4.Natural rubber is a linear polymer of isoprene (2-methyl-1, 3-butadiene) and is also called as cis - 1, 4 - polyisoprene. 5.The cis-polyisoprene molecule consists of various chains held together by weak van der Waals interactions and has a coiled structure. 6.Thus, it can be stretched like a spring and exhibits elastic properties. 7.Neoprene has superior resistance to vegetable and mineral oils. 8.It is used for manufacturing conveyor belts, gaskets and hoses
Pre-Requisites:
Elements, compounds, molecules
Activity:
Rubber is used to make a variety of things ex: pipes, tires
Real Life Question:
How is rubber 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 |
|---|---|
| Rubber | Rubber is a polymer |
Real life uses :
Neoprene – synthetic rubber is used for making conveyor belts, gaskets and hoses
Places to visit :
Departmental store
Practical examples around us
| Examples | Explainations |
|---|---|
| Tires, pipes, mats, gloves | All made of rubber |
What you learn in Theory:
1.Rubber also called elastomer is a natural polymer and possesses elastic properties. 2.It is manufactured from rubber latex which is a colloidal dispersion of rubber in water. 3.This latex is obtained from the bark of rubber tree and is found in India, Sri Lanka, Indonesia, Malaysia and South America. 4.Natural rubber is a linear polymer of isoprene (2-methyl-1, 3-butadiene) and is also called as cis - 1, 4 - polyisoprene. 5.The cis-polyisoprene molecule consists of various chains held together by weak van der Waals interactions and has a coiled structure. 6.Thus, it can be stretched like a spring and exhibits elastic properties. 7.Neoprene has superior resistance to vegetable and mineral oils. 8.It is used for manufacturing conveyor belts, gaskets and hoses
What you learn in Practice:
Rubber is made from rubber latex