Buna - S is a

Options

A. addition polymer
B. condensation polymer
C. both (a) and (b)
D. none of these

Answer

**Step-by-Step Solution:**

1. **Identify the Type of Polymer:**
- We need to determine whether Buna-S is an addition polymer, a condensation polymer, or neither.

2. **Understand the Monomers:**
- Buna-S is made from two main monomers: 1,3-butadiene and styrene.
- The chemical structures are:
- 1,3-butadiene: CH2=CH-CH=CH2
- Styrene: C6H5-CH=CH2

3. **Polymerization Process:**
- In the case of Buna-S, the polymerization involves the addition of the monomers without the loss of any small molecules.
- The double bonds in the monomers open up and link together to form long chains.

4. **Determine the Nature of Polymerization:**
- Since no small molecules (like water or methanol) are eliminated during the process, it indicates that the polymerization is not condensation.
- Therefore, the process is classified as addition polymerization.

5. **Conclusion:**
- Based on the above analysis, Buna-S is classified as an addition polymer.

**Final Answer:**
Buna-S is an addition polymer.

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