Classification Of Polymers
Chapter Name : Polymers |
Sub Topic Code : 102_12_15_02_05 |
Topic Name : Classification Of Polymers |
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Sub Topic Name : Classification Based On Growth Polymerization |
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Introduction
1.The addition and condensation polymers are also called chain growth polymers and step growth polymers depending on the type of polymerization mechanism they undergo during their formation. 2.The addition polymers are formed by the repeated addition of monomer molecules possessing double or triple bonds, Ex: the formation of polythene from ethene and polypropene from propene. 3.The condensation polymers are formed by repeated condensation reaction between two different bi-functional or tri-functional monomeric units. 4.The elimination of small molecules such as water, alcohol, hydrogen chloride, etc. also take place. 5.The examples are terylene (dacron), nylon 6, 6, nylon 6, etc. For example, nylon 6, 6 is formed by the condensation of hexamethylene diamine with adipic acid.
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 addition and condensation polymers are also called chain growth polymers and step growth polymers depending on the type of polymerization mechanism they undergo during their formation. 2.The addition polymers are formed by the repeated addition of monomer molecules possessing double or triple bonds, Ex: the formation of polythene from ethene and polypropene from propene. 3.The condensation polymers are formed by repeated condensation reaction between two different bi-functional or tri-functional monomeric units. 4.The elimination of small molecules such as water, alcohol, hydrogen chloride, etc. also take place. 5.The examples are terylene (dacron), nylon 6, 6, nylon 6, etc. For example, nylon 6, 6 is formed by the condensation of hexamethylene diamine with adipic acid.
What you learn in Practice:
Polymers have a variety of uses