When condensation product of hexamethylenediamine and adipic acid is heated to `553K(80^(@)C)` in an atmosphere of nitrogen for about `4-5` hours, the product obtained is

Options

A. Solid polymer of nylon 6,6
B. Liquid polymer of nylon 6,6
C. Gaseous polymer of nylon 6,6
D. Liquid polymer of nylon 6

Answer

To solve the question step by step, we need to analyze the reaction between hexamethylenediamine and adipic acid and the conditions under which the product is heated.

### Step 1: Identify the Reactants
Hexamethylenediamine (HMD) is a diamine with the formula H2N(CH2)6NH2, and adipic acid is a dicarboxylic acid with the formula HOOC(CH2)4COOH.

### Step 2: Understand the Reaction
When hexamethylenediamine reacts with adipic acid, a condensation reaction occurs, where water is eliminated, resulting in the formation of a polymer. This type of reaction is typical for the formation of polyamides.

### Step 3: Determine the Type of Polymer Formed
The polymer formed from the reaction of hexamethylenediamine and adipic acid is known as nylon 6,6. This is because the repeating unit in the polymer chain is derived from the hexamethylenediamine and adipic acid.

### Step 4: Analyze the Heating Conditions
The question specifies that the condensation product is heated to 553 K (which is equivalent to 80°C) in an atmosphere of nitrogen for about 4-5 hours. Heating nylon 6,6 under these conditions will help in further polymerization and possibly in enhancing the properties of the polymer.

### Step 5: Conclude the Product
Given the reactants and the conditions, the product obtained after heating is a liquid polymer of nylon 6,6.

### Final Answer
The product obtained is **liquid nylon 6,6**.

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