1.

Refer to the following table listing for different polymers formed from respective monomers. Identify from the list whether it is copolymer or homopolymer.MonomerPolymersEthylenePolyetheneVinyl chloridePolyvinyl chlorideIsobutylenePolyisobutyleneAcrylonitrilePolyacrylonitrileCaprolactamNylon 6Hexamethylene diammonium adipateNylon 6, 6Butadiene + 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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