Which of the following type of Polyvinyl chloride polymer is?

  1. Linear polymers
  2. Branched polymers
  3. Network or cross-linked polymer
  4. None

Answer (Detailed Solution Below)

Option 1 : Linear polymers
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Detailed Solution

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The correct answer is Linear polymers​.

  • Linear polymers:
    • It consists of a long and straight-chain of monomers.
    • PVC is a linear polymer.
  • Branched polymers: 
    • They are linear polymers containing some branches.
    • e.g Low-density Polythene.
  • Network or cross-linked polymer: 
    • Polymers having cross-linked bonds with each other is called cross-linked or network polymer.
    • e.g Bakelite and melamine. 

Notes:

  • PVC formation:

TI-Plastics-Pinking2

  • Some important monomers:
Polymer Monomer
Rubber Isoprene (1, 2-methyl 1 – 1, 3-butadiene)
BUNA – S (a) 1, 3-butadiene (b) Styrene
BUNA – N (a) 1, 3-butadiene (b) Vinyl Cyanide
Teflon Tetra Fluoro Ethene
Terylene (a) Ethylene glycol (b) Terephthalic acid
Glyptal (a) Ethylene glycol (b) Phthalic acid
Bakelite (a) Phenol (b) Formaldehyde
PVC Vinyl Chloride
Melamine Formaldehyde Resin (a) Melamine (b) Formaldehyde
Nylon-6 Caprolactam
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