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Classification of Polymers

  • Polymers − Large molecules having high molecular mass (103 − 107 u)

  • Polymerisation − Process of formation of polymers from respective monomers


Classification of Polymers

Classification Based on Source

  • Natural polymers: Found in plants and animals

Example: Proteins, starch, cellulose, resins and rubber

  • Semi-synthetic polymers: Cellulose derivatives

Example: Cellulose acetate (rayon), cellulose nitrate

  • Synthetic polymers: Man-made polymers

Example: Plastic (polythene), synthetic fibres (nylon 6, 6) synthetic rubbers (Buna − S)

Classification Based on Structure

  • Linear Polymers: Consist of long and straight chains

  • Example: High density polythene, polyvinyl chloride, etc.

  • Represented as

  • Branched-chain polymers: Contain linear chains having some branches

  • Example: Low density polythene

  • Represented as

  • Cross-linked or Network polymers

  • Formed from bi-functional and tri-functional polymers

  • Contain strong covalent bonds between various linear polymer chains

  • Example: Bakelite, melamine, etc.

  • Represented as

Classification Based on Mode of Polymerisation

  • Addition polymers

  • Formed by the repeated addition of monomer molecules possessing doubleā€¦

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