Explain homopolymers and copolymers with examples.

Homopolymers are the polymers obtained from the polymerisation of only one kind of monomer. Example: Polyethene is a homopolymer of ethene. nCH 2 = CH 2 → Polymerisation - - CH 2 - CH 2 - n - When two or more different monomers combine to give a polymer, then the polymer is called copolymer. Example: Nylon-66 is a copolymer of hexamethylenediamine and adipic acid (hexanedioic acid). nH 2 N - CH 2 6 - NH 2 + nHO - CO - CH 2 4 - CO - OH → High pressure 553 K - NH - CH 2 6 - NH - CO - CH 2 4 - CO n -

How is Nylon-66 obtained? Give one of its uses.

Nylon-66 is prepared by the condensation of hexamethylenediamine with adipic acid (hexanedioic acid) under high pressure and high temperature. nH 2 N - CH 2 6 - NH 2 + nHO - CO - CH 2 4 - CO - OH → High pressure 553 K - NH - CH 2 6 - NH - CO - CH 2 4 - CO n - Nylon-66 is used in making bristles of brushes, in textile industry, manufacture of cords and climbing ropes. It is linear polymer with high tensile strength.

What are homopolymer and copolymer? Give one example of each.

Homopolymers are the polymers obtained from the polymerisation of only one kind of monomer. Example: Polyethene is a homopolymer of ethene. When two or more different monomers combine to give a polymer, then the polymer is called copolymer. Example: Buna - S is a copolymer of 1 , 3 -Butadiene and styrene.

What are biodegradable and non-biodegradable polymers? Give one example each.

The polymers that can be broken into smaller molecule by enzyme catalysed reactions of microorganisms are called biodegradable polymers. Example: Nylon-2-Nylon-6, polyactic acid (PLA), etc. The polymers that cannot be broken into smaller molecule by enzyme catalysed reactions of microorganisms are called non-biodegradable polymers. Example: Polystyrene, polyethylene, etc.

How is Nylon-66 obtained? Give one of its uses.

Nylon-66 is prepared by the condensation of hexamethylenediamine with adipic acid (hexanedioic acid) under high pressure and high temperature. nH 2 N - CH 2 6 - NH 2 + nHO - CO - CH 2 4 - CO - OH → High pressure 553 K - NH - CH 2 6 - NH - CO - CH 2 4 - CO n - Nylon-66 is used in making bristles of brushes, in textile industry, manufacture of cords and climbing ropes. It is linear polymer with high tensile strength.

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EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 15 - Polymers>Nagaland Board-2019>Q 3

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12th Nagaland Board

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Define condensation polymer. Write the chemical equation for the synthesis of bakelite.

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