Teflon is not

a copolymer

The correct answer is Option (1) → a copolymer.

Let us delve into the properties and characteristics of Teflon (polytetrafluoroethylene or PTFE) to clarify the answer regarding its classification.

Teflon is a polymer composed of repeating units of tetrafluoroethylene, which has the chemical formula \((C_2F_4)_n\). The structure consists of a long chain of carbon atoms, each bonded to fluorine atoms.

Teflon is synthesized through the process of free radical polymerization, where the tetrafluoroethylene monomers are linked together to form the polymer chain.

Analysis of Options

1. A Copolymer:

A copolymer is made from two or more different types of monomers. Teflon is a homopolymer since it is formed from only one type of monomer (tetrafluoroethylene). Therefore, it does not fit the definition of a copolymer. Teflon is not a copolymer.

2. A Chain Growth Polymer:

Chain growth polymers are formed by the successive addition of monomer units to a growing chain. Teflon is synthesized via chain growth polymerization, where the tetrafluoroethylene monomers react to form a long chain. The reaction typically involves a free radical initiator, which starts the chain reaction. Teflon is a chain growth polymer.

3. Resistant to Attack by Corrosive Reagents:

Teflon is well-known for its outstanding chemical resistance, making it suitable for use in environments that involve corrosive chemicals (e.g., acids, bases, solvents). Due to this property, Teflon is used in coatings for cookware, gaskets, seals, and lining for pipes and tanks that handle aggressive substances. Teflon is resistant to attack by corrosive reagents.

4. Chemically Inert:

The strong carbon-fluorine bonds in Teflon give it a very stable and non-reactive nature. It does not react with most chemicals and maintains its integrity under various conditions. Teflon is chemically inert.

Conclusion

Thus, the correct interpretation of the question is that "Teflon is not a copolymer". This highlights its unique characteristics and clarifies why the other options do not apply.