1. Tardigrade
  2. Question
  3. Chemistry
  4. How many of the following are incorrect combinations? i. HDP - linear polymer ii. Novolac - linear polymer iii. Nylon -6 - polyamide iv. Dacron - step growth polymerization v. Teflon - chain growth polymerization vi. Buna -S - copolymer vii. Polyacrylonitrile - copolymer viii. Neoprene - copolymer

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Q. How many of the following are incorrect combinations?
$i.$ $HDP$ - linear polymer
$ii.$ Novolac - linear polymer
$iii.$ Nylon $-6$ - polyamide
$iv.$ Dacron - step growth polymerization
$v.$ Teflon - chain growth polymerization
$vi.$ Buna $-S$ - copolymer
$vii.$ Polyacrylonitrile - copolymer
$viii.$ Neoprene - copolymer

NTA AbhyasNTA Abhyas 2022

Solution:

High-density polyethylene is a linear polymer. Novolac is formed by phenol and formaldehyde, and it is a linear polymer. Nylon-$6$ is formed from caprolactam and it is a polyamide. Linear chain polymers are chain-growth polymers, Teflon is an example of it. Condensations polymers are generally step growth polymers, Dacron is an example of it. Copolymers are formed from two different monomer units. Homopolymers are formed from a single monomer unit.
Polyacrylonitrile -Homopolymer
Neoprene - Homopolymer