Nylon threads are made up of

Options

A. Polyethylene polymers
B. Polyester polymers
C. Polyvinyl polymers
D. Polyamide polymers

Answer

To determine what nylon threads are made up of, we need to analyze the chemical structure and composition of nylon, particularly nylon 6-6.

### Step-by-Step Solution:

1. **Identify the Type of Polymer**:
- Nylon is a type of synthetic polymer. It is important to recognize that there are different classes of polymers, including polyethylenes, polyesters, polyvinyls, and polyamides.

2. **Understand the Composition of Nylon**:
- Nylon is formed through a condensation reaction between two specific monomers: adipic acid and hexamethylenediamine.

3. **Chemical Structure of Monomers**:
- **Adipic Acid**: Its chemical formula is C6H10O4, which has two carboxylic acid groups (–COOH).
- **Hexamethylenediamine**: Its formula is C6H16N2, which contains two amine groups (–NH2).

4. **Polymerization Process**:
- During the polymerization of nylon 6-6, adipic acid and hexamethylenediamine react to form a long chain polymer. This reaction involves the elimination of water (H2O) and the formation of amide bonds (–CONH–) between the monomers.

5. **Identify the Type of Linkage**:
- The key feature of nylon 6-6 is the presence of amide linkages (–CONH–). This is what classifies nylon as a polyamide.

6. **Conclusion**:
- Based on the structure and the type of bonds formed during its synthesis, we conclude that nylon threads are made up of **polyamide polymers**.

### Final Answer:
Nylon threads are made up of **polyamide polymers**.

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