Introduction:
Nylon 6,6 is a synthetic polymer that contains repeating units of amide groups. It is composed of two monomers, adipic acid and hexamethylenediamine. The intermolecular forces present in Nylon 6,6 determine its physical and chemical properties, such as its melting point, solubility, and tensile strength. Among the various types of intermolecular forces, hydrogen bonding is the predominant force in Nylon 6,6.

Explanation:

Intermolecular Forces:
Intermolecular forces are the attractive forces that exist between molecules. These forces determine the physical properties of substances, such as boiling point, melting point, and solubility.

Hydrogen Bonding:
Hydrogen bonding is a type of intermolecular force that occurs when a hydrogen atom is bonded to a highly electronegative atom (such as nitrogen, oxygen, or fluorine) and is attracted to another electronegative atom. In Nylon 6,6, the amide groups (-CONH-) contain a hydrogen atom bonded to the highly electronegative nitrogen atom. These hydrogen atoms can form hydrogen bonds with other electronegative atoms in neighboring molecules.

Presence of Hydrogen Bonding in Nylon 6,6:
In Nylon 6,6, the amide groups are present in the main chain of the polymer. The nitrogen atom in the amide group is highly electronegative and can form hydrogen bonds with the carbonyl oxygen atoms in neighboring amide groups. These hydrogen bonds contribute to the overall stability and strength of the polymer.

Effects of Hydrogen Bonding:
Hydrogen bonding in Nylon 6,6 leads to several important properties:

1. High Melting Point: Hydrogen bonding provides strong intermolecular attractions, resulting in a high melting point for Nylon 6,6. This makes it a suitable material for applications that require high-temperature stability.

2. High Tensile Strength: The hydrogen bonds between the amide groups contribute to the overall strength of Nylon 6,6. This polymer has excellent tensile strength, making it suitable for applications that require strong and durable materials.

3. Low Solubility: The presence of hydrogen bonding restricts the ability of Nylon 6,6 to dissolve in solvents. The hydrogen bonds between the amide groups are strong, and breaking these bonds requires a significant amount of energy.

Conclusion:
In conclusion, the intermolecular force that is present in Nylon 6,6 is hydrogen bonding. The presence of hydrogen bonds between the amide groups contributes to the high melting point, high tensile strength, and low solubility of Nylon 6,6. These properties make Nylon 6,6 a versatile and widely used polymer in various industrial applications.