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Introduction to Polymer Chemistry — Chemistry STD 12 Science — Question

Maharashtra BoardEnglish MediumSTD 12 ScienceChemistryIntroduction to Polymer Chemistry3 Marks
Question
Refer to the following table listing for different polymers formed from respective monomers. Identify from the list whether it is copolymer or homopolymer.
MonomerPolymers
EthylenePolyethene
Vinyl chloridePolyvinyl chloride
IsobutylenePolyisobutylene
AcrylonitrilePolyacrylonitrile
CaprolactamNylon 6
Hexamethylene diammonium adipateNylon 6, 6
Butadiene + styreneBuna-S
✓

Answer

In each of first five cases, there is only one monomer which gives corresponding homopolymer. In the sixth case hexamethylene diamine reacts with adipic acid to form the salt hexamethylene diammonium adipate which undergoes condensation to form Nylon 6, 6. Hence nylon 6, 6 is homopolymer. The polymer Buna-S is formed by polymerization of the monomers butadiene and styrene in presence of each other. The repeating units corresponding to the monomers butadiene and styrene are randomly arranged in the polymer. Hence Buna-S is copolymer.

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