What type of reaction occurs in the formation of Nylon 6,6 polymer?

Explanation

To determine the type of reaction that occurs in the formation of the Nylon 6,6 polymer, we can follow these steps:

### Step 1: Identify the Monomers
Nylon 6,6 is formed from two specific monomers: adipic acid and hexamethylenediamine.

### Step 2: Understand the Nature of the Monomers
- **Adipic Acid**: This is a dicarboxylic acid, meaning it has two carboxylic acid (-COOH) groups.
- **Hexamethylenediamine**: This is a diamine, meaning it has two amine (-NH2) groups.
...