Question

Which one of the following pairs is not correctly matched ?

• A. Terylene-condensation polymer ofterephthalic acid and ethylene glycol
• B. Teflon-thermally stable cross linked polymerof phenol and formaldehyde
• C. Perspex-A homopolymer of methylmethacrylate
• D. Synthetic rubber-A copolymer of butadieneand styrene.

Answer 1

The Correct Option is B

Synthetic rubber-A copolymer of butadieneand styrene is not correctly matched.

As for the other options it can be observed that–

• Ethylene glycol and terephthalic acid condense to form terylene. Terylene is a byproduct of condensation polymerization, which creates high molecular mass condensation polymers by repeatedly combining two bifunctional monomers called ethylene glycol and terephthalic acid. In order to make it, ethylene glycol and terephthalic acid are condensation polymerized while the water is removed. A catalyst like zinc acetate and antimony trioxide is used in this reaction, which takes place at a temperature between 420 and 460 K. Terylene is also known by the names Dacron and polyester.
• Methyl methacrylate is a homopolymer found in Perspex. It is a translucent plastic that is used to make lighting fixtures, displays, and signage. Butadiene and styrene copolymerize to form synthetic rubber. It is utilised in the production of conveyor belts, industrial hoses, and tyres.
• The most popular synthetic rubber is styrene-butadiene rubber (SBR), which is created by copolymerizing butadiene (75%) and styrene (25%) with the use of free radical initiators. 

But for the correct option– 

Teflon is not a phenol and formaldehyde cross-linked polymer. Rather, it is a tetrafluoroethylene polymer. Teflon is renowned for its resilience to high temperatures and non-stick qualities. Cookware, electrical insulation, and the aerospace sectors are just a few of the uses for it.