MCQ
Which of the following is a step $-$ growth polymer?
- APolyacrylonitrile
- BPolyisoprene
- ✓Nylon
- DPolythene
✓
Answer
Correct option: C.
Nylon
Step$-$growth polymerization refers to a type of polymerization mechanism in which $bi-$functional or multifunctional monomers react to form first dimers, then trimers, longer oligomers and eventually long-chain polymers.
For example, Nylon polymerizes by the step$-$growth polymerization process in which difunctional monomers containing equal parts of amine and carboxylic acid react so that amides are formed at both ends of each monomer
Polyacrylonitrile, Polyisoprene and Polythene polymerize by chain$-$growth polymerization of acrylonitrile, isoprene $(2-$methyl$-1, 3-$butadiene$)$ and ethene, respectively.
Chain-growth polymerization $($or addition polymerization$)$ involves the linking together of molecules incorporating double or triple carbon$-$carbon bonds.
For example, Nylon polymerizes by the step$-$growth polymerization process in which difunctional monomers containing equal parts of amine and carboxylic acid react so that amides are formed at both ends of each monomer
Polyacrylonitrile, Polyisoprene and Polythene polymerize by chain$-$growth polymerization of acrylonitrile, isoprene $(2-$methyl$-1, 3-$butadiene$)$ and ethene, respectively.
Chain-growth polymerization $($or addition polymerization$)$ involves the linking together of molecules incorporating double or triple carbon$-$carbon bonds.
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