write the name of Two polymers and method of its preparation.
Answers
Answer:
Polymers are macromolecules having high molecular weights and composed of smaller repeating units called monomers. The term polymer is derived from Greek roots 'poly' means 'many' and 'meros' means 'part'.
(1) Acrylonitrile (A), butadiene (B) and styrene (S) combine together to form ABS plastic (a polymer) which is tough, strong and used to prepare articles which withstand heavy impacts.
(2) Vinylidene chloride and vinylchloride form a polymer used as a film for wrapping food (polymer is called saran).
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Answer:
n(CH
2
=CH
2
)
Polymerisation
Hightemperatureandhighpressure
Polythene
(−CH
2
−CH
2
−)
n
where n is the number of molecules.
In the same way, Polyvinyl Chloride (P.V.C.), Teflon, Neoprin etc. are also polymers.
Some important polymers, their method of preparation, properties and uses -
1. Polythese (Poly + Ethene = Polythene) It is a synthetic polymer of the additional series.
It's monomer unit is ethylene.
n(CH
2
=CH
2
)
Polymerisation
1000−200A.P.
Polythene
(−CH
2
−CH
2
−)
n
Property - It is transparent, elastic, strong, and solid plastic.
use - It is used in making raincoats, toys, pipes, bags etc.
2.Polyvinyl Chloride (P.V.C.) - It is also synthetic polymer of additional series. It's monomer unit is Vinyl chloride.
(VinylChloride)
CH
2
=CH.Cl
⟶
PolyVinylChloride
−CH
2
cl
∣
CH
Properties - It is a hard polymer.
Uses - It is used in making floor tiles, pipes, toys etc.\
Tetra∗∗FluroEthnene
n(CF
2
=CF
2
)
⟶
Teflon
(−CF
2
−CF
2
−)
n
Properties - It is a hard and heat resistant substance.
Uses - It is used in making non stick utensils.
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