Which of the following type of force are present in Nylon-66?

Options

A. vasn dar Waal's forces of attraction
B. Hydrogen bonding
C. Three dimensional network of bonds
D. None of these

Answer

To determine the types of forces present in Nylon-66, we can follow these steps:

### Step 1: Understand the Composition of Nylon-66
Nylon-66 is a condensation polymer made from two monomers: hexamethylenediamine and adipic acid.

### Step 2: Identify the Structure of the Monomers
- **Hexamethylenediamine** has the formula NH2(CH2)6NH2. This structure includes two amine (NH2) groups.
- **Adipic Acid** has the formula HOOC(CH2)4COOH. This structure includes two carboxylic acid (COOH) groups.

### Step 3: Polymerization Process
During the polymerization of hexamethylenediamine and adipic acid, a condensation reaction occurs, resulting in the loss of water molecules. The repeating unit of Nylon-66 can be represented as:
\[ \text{HN(CH}_2\text{)}_6\text{NHCO(CH}_2\text{)}_4\text{CO} \]

### Step 4: Identify the Types of Forces Present
In the structure of Nylon-66:
- **Hydrogen Bonds**: The presence of nitrogen (from the amine groups) and oxygen (from the carbonyl groups of the carboxylic acid) allows for hydrogen bonding. Hydrogen bonds occur between the hydrogen atom of the amine group and the electronegative atoms (nitrogen and oxygen).
- **Dipole-Dipole Interactions**: The polar nature of the amine and carbonyl groups also leads to dipole-dipole interactions between the molecules.
- **Van der Waals Forces**: These are weaker interactions that are present due to the overall molecular structure and interactions between the chains.

### Conclusion
The primary types of forces present in Nylon-66 are hydrogen bonds, dipole-dipole interactions, and van der Waals forces.

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