Question
Write the classification of polymers based on structure. Give examples###Write the reactions involved in the preparation of (1) Polyvinyl chloride (PVC) (2) Polypropylene.
✓
Answer
Based on structure polymers are classified as linear chain polymers, branched chain polymers and network or cross linked polymers.
(1) Linear chain polymers : When the monomer molecules are joined together in a linear arrangement, the resulting polymer is straight-chain or long-chain polymer, e.g., polythene, PVC.
(2) Branched-chain polymers : These polymers consist of long and straight chain with smaller side chains give rise to branched-chain polymers. They have low density. They have lower melting points and tensile strength. Polypropylene having methyl groups as branches.
(3) Network or cross-linked polymers : These polymers consist of cross-linking of chains by strong covalent bonds leading to a network-like structure. Cross-linking results from polyfunctional monomers, e.g., melamine, bakelite, vulcanization of rubber. These polymers are hard rigid and brittle.
(1) Linear chain polymers : When the monomer molecules are joined together in a linear arrangement, the resulting polymer is straight-chain or long-chain polymer, e.g., polythene, PVC.
(2) Branched-chain polymers : These polymers consist of long and straight chain with smaller side chains give rise to branched-chain polymers. They have low density. They have lower melting points and tensile strength. Polypropylene having methyl groups as branches.
(3) Network or cross-linked polymers : These polymers consist of cross-linking of chains by strong covalent bonds leading to a network-like structure. Cross-linking results from polyfunctional monomers, e.g., melamine, bakelite, vulcanization of rubber. These polymers are hard rigid and brittle.
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
Explain the construction and working of a dry cell (or Leclanche’s cell).###Write a note on dry cell.
Explain the trends in atomic radii of d-block elements
Distinguish between thermosetting and thermoplastic resins. Write example of both the classes.
Explain ring structure of glucose.
What are monohydric alcohols? How are they classified?
Explain band theory.
###
Explain the origin of electrical properties in solids.
###
Explain the origin of electrical properties in solids.
A protein chain has the following amino acid residues. Show and label the interactions that can be present in various pairs from these giving rise to tertiary level structure of protein.
What happens when chlorine reacts with? $S_8$
→Closed system and Isolated system :
Explain oxidising nature of chlorine with chemical reactions.