Introduction to Polymer Chemistry
Classification of Polymers
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Polymers − Large molecules having high molecular mass (103 − 107 u)
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Polymerisation − Process of formation of polymers from respective monomers
Example:
Classification of Polymers
Classification Based on Source
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Natural polymers: Found in plants and animals
Example: Proteins, starch, cellulose, resins and rubber
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Semi-synthetic polymers: Cellulose derivatives
Example: Cellulose acetate (rayon), cellulose nitrate
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Synthetic polymers: Man-made polymers
Example: Plastic (polythene), synthetic fibres (nylon 6, 6) synthetic rubbers (Buna − S)
Classification Based on Structure
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Linear Polymers: Consist of long and straight chains
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Example: High density polythene, polyvinyl chloride, etc.
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Represented as
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Branched-chain polymers: Contain linear chains having some branches
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Example: Low density polythene
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Represented as
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Cross-linked or Network polymers
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Formed from bi-functional and tri-functional polymers
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Contain strong covalent bonds between various linear polymer chains
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Example: Bakelite, melamine, etc.
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Represented as
Classification Based on Mode of Polymerisation
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Addition polymers
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Formed by the repeated addition of monomer molecules possessing doubleā¦
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