Buna-S rubber is which of the following of 1-3-butadiene and tyrene

Options

A. Polymers
B. Copolymer
C. Addition
D. Condensation polymer

Explanation

To determine what Buna-S rubber is, we can follow these steps:

### Step 1: Identify the Components
Buna-S rubber is made from two main components: 1,3-butadiene and styrene.

### Step 2: Understand the Structure
1,3-butadiene has the following structure:
- It is represented as CH2=CH-CH=CH2. This indicates that it has two double bonds.

Styrene has the structure:
- It is represented as C6H5-CH=CH2, which includes a benzene ring (C6H5) attached to a vinyl group (CH=CH2).

### Step 3: Determine the Type of Polymer
Buna-S rubber is formed through the polymerization of these two monomers. The process involves the addition of the monomers to form a long chain, which is characteristic of addition polymers.

### Step 4: Classify the Polymer
Since Buna-S rubber is made from two different types of monomers (1,3-butadiene and styrene), it is classified as a copolymer.

### Step 5: Conclusion
Thus, Buna-S rubber is a copolymer of 1,3-butadiene and styrene.

### Final Answer
Buna-S rubber is a copolymer of 1,3-butadiene and styrene.

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