Which of the following polymers can be made by cationic addition polymersation mechanism?

Options

A. `PVC`
B. `PP`
C. `HDPE`
D. `LDPE`

Answer

To determine which of the given polymers can be made by cationic addition polymerization mechanism, we will analyze each option provided.

### Step-by-Step Solution:

1. **Understand Cationic Addition Polymerization**:
- Cationic addition polymerization is a type of chain-growth polymerization where a cationic initiator reacts with a monomer to form a reactive species. This reactive monomer can then react with other monomers to form a polymer.

2. **Evaluate Each Polymer Option**:
- **Option 1: PVC (Polyvinyl Chloride)**:
- PVC is synthesized through radical polymerization, not cationic polymerization. Therefore, this option does not fit the criteria.

- **Option 2: PPE (Polyphenylene Ether)**:
- PPE can be synthesized through cationic polymerization. This option is a candidate for our answer.

- **Option 3: HDPE (High-Density Polyethylene)**:
- HDPE is produced through Ziegler-Natta catalytic polymerization, which is not cationic polymerization. Thus, this option is not correct.

- **Option 4: LDPE (Low-Density Polyethylene)**:
- Similar to HDPE, LDPE is also produced via Ziegler-Natta catalytic polymerization and not cationic polymerization. Therefore, this option is also incorrect.

3. **Conclusion**:
- Among the options provided, only PPE can be made by cationic addition polymerization mechanism.

### Final Answer:
- The polymer that can be made by cationic addition polymerization mechanism is **PPE (Polyphenylene Ether)**.