Which of the following is not correctly matched?

Options

A. Neoprene:
`-(CH_(2)-overset(Cl)overset("| ")"C "-CH-CH_(2)-)_(n)`
B. Nylon - 66:
`-(NH-(CH_(2))_(6)-NH-Co-(CH_(2))_(4)-overset(O)overset(||)C)_(n)`
C.
D. Polymethyl methacrylate (PMMA):
`{:(" "CH_(3)),(" |"),((-CH_(2)-C-)_(n)),(" |"),(" "COOCH_(3)):}`

Answer

To determine which of the following is not correctly matched, we will analyze each option provided in the question.

### Step-by-Step Solution:

1. **Identify the First Option: Neoprene**
- Neoprene is made from the monomer chloroprene.
- The structure of chloroprene is CH2=CHCl-CH=CH2.
- When polymerized, chloroprene forms neoprene, which is a synthetic rubber.
- **Conclusion**: Neoprene is correctly matched with chloroprene.

2. **Identify the Second Option: Nylon 66**
- Nylon 66 is formed from hexamethylenediamine and adipic acid.
- The structure of hexamethylenediamine is NH2-(CH2)6-NH2.
- The structure of adipic acid is HOOC-(CH2)4-COOH.
- When these two react, they undergo condensation polymerization, releasing water to form nylon 66.
- **Conclusion**: Nylon 66 is correctly matched with hexamethylenediamine and adipic acid.

3. **Identify the Third Option: Terylene**
- Terylene (also known as PET) is made from ethylene glycol and terephthalic acid.
- The structure of ethylene glycol is HO-CH2-CH2-OH.
- The structure of terephthalic acid is HOOC-C6H4-COOH.
- When these react, they also undergo condensation polymerization, releasing water to form terylene.
- **Conclusion**: Terylene is correctly matched with ethylene glycol and terephthalic acid.

4. **Identify the Fourth Option: Polymethyl Methacrylate (PMMA)**
- PMMA is made from the monomer methyl methacrylate.
- The structure of methyl methacrylate is CH2=C(CH3)COOCH3.
- Upon polymerization, it forms a polymer with repeating units of the above structure.
- **Conclusion**: PMMA is correctly matched with methyl methacrylate.

5. **Final Evaluation:**
- After analyzing all options, we find that the option regarding Terylene is not correctly matched as per the description provided in the question. The structure given for Terylene does not accurately reflect its formation from ethylene glycol and terephthalic acid.

### Answer:
The option that is not correctly matched is **Terylene**.