[Image showing monomers of Buna-S: 1,3-Butadiene and Styrene]
Buna-S stands for {Bu}tadiene {Na}trium (Sodium) {S}tyrene. Sodium was originally used as the catalyst for the polymerization.
Buna-S is a synthetic and linear thermosetting polymer.
Neoprene is an addition copolymer used in plastic bucket manufacturing.
Synthesis of Buna-S needs nascent oxygen.
Show Solution
The Correct Option isD
Solution and Explanation
To determine which statement is correct, let's analyze each option in the context of polymers in chemistry:
Buna-N is a natural polymer.
Buna-N, also known as Nitrile rubber, is not a natural polymer. It is a synthetic rubber copolymer of acrylonitrile (ACN) and butadiene. Therefore, this statement is incorrect.
Buna-S is a synthetic and linear thermosetting polymer.
Buna-S, or Styrene-Butadiene Rubber (SBR), is indeed a synthetic polymer, but it is not thermosetting; it is a thermoplastic elastomer. Thermosetting polymers harden irreversibly, while Buna-S can be remolded and reshaped. Thus, this statement is incorrect.
Neoprene is an addition copolymer used in plastic bucket manufacturing.
Neoprene is indeed an addition polymer but is commonly used in applications like wetsuits, gaskets, hoses, etc., due to its flexibility and chemical inertness. It is not typically used in plastic bucket manufacturing. This makes the statement incorrect.
Synthesis of Buna-S needs nascent oxygen.
The process of making Buna-S involves free radical polymerization of butadiene and styrene, and nascent oxygen is often used in initiating free radicals for such polymerization reactions. Therefore, this statement is correct.
Therefore, the correct statement from the options provided is: Synthesis of Buna-S needs nascent oxygen.
