Which is the addition polymer

Options

A. Nylon-66
B. Teflon
C. Polyester
D. PHBV

Answer

To determine which of the given options is an addition polymer, we need to understand the characteristics of addition polymers and how they differ from condensation polymers.

### Step-by-Step Solution:

1. **Understanding Addition Polymers**:
- Addition polymers are formed when monomer units add together without the loss of any small molecules (like water). The process involves the breaking of double bonds in the monomers, allowing them to link together to form long chains.

2. **Analyzing the Options**:
- **Option A: Nylon 66**:
- Nylon 66 is formed from the reaction between adipic acid and hexamethylene diamine. This reaction releases water as a by-product, which classifies it as a condensation polymer.
- **Option B: Teflon**:
- Teflon is made from the polymerization of tetrafluoroethylene. This process does not produce any by-products, making Teflon an addition polymer.
- **Option C: Polyester**:
- Polyesters, like Dacron, are formed from the reaction between diols (like ethylene glycol) and dicarboxylic acids (like terephthalic acid), releasing water as a by-product. Thus, they are condensation polymers.
- **Option D: PHBV**:
- PHBV (Poly(3-hydroxybutyrate-co-3-hydroxyvalerate)) is formed from the polymerization of 3-hydroxybutanoic acid and 3-hydroxyvaleric acid, which also releases water. Therefore, it is a condensation polymer.

3. **Conclusion**:
- Among the options provided, **Option B: Teflon** is the only addition polymer.

### Final Answer:
**Option B: Teflon** is the addition polymer.

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