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Chapter 7: Problem 89

Intermolecular forces present in nylon-66 are mainly (a) hydrogen bonding (b) dipole-dipole interactions (c) van der Waal's forces (d) cross linking

Short Answer

Expert verified
Answer: (a) hydrogen bonding

Step by step solution

01

Understanding hydrogen bonding

Hydrogen bonding is a special type of intermolecular force that occurs when a hydrogen atom is covalently bonded to a highly electronegative atom (such as nitrogen, oxygen, or fluorine) and is attracted to the lone pair of electrons on another electronegative atom in the same or another molecule.
02

Understanding dipole-dipole interactions

Dipole-dipole interactions occur when polar molecules with permanent dipoles interact with one another. These interactions are based on the electrostatic attraction between the positive and negative ends of polar molecules.
03

Understanding van der Waal's forces

Van der Waal's forces are weak intermolecular forces that arise from temporary attractions between atoms and molecules due to instantaneous dipoles. There are two types of van der Waal's forces: London dispersion forces and Keesom (dipole-dipole) forces.
04

Understanding cross-linking

Cross-linking is the process of connecting linear polymer chains by the formation of covalent or ionic bonds, creating a three-dimensional network structure. This type of interaction is not typically considered an intermolecular force but rather a chemical bonding process.
05

Analyzing the structure of nylon-66

Nylon-66 is a synthetic polymer composed of repeating units of hexamethylenediamine and adipic acid. Each repeating unit contains an amide bond formed by the reaction of an amine group (-NH_2) and a carboxylic acid group (-COOH). The amide bonds contain nitrogen (N) and hydrogen (H) atoms that can participate in hydrogen bonding with oxygen (O) atoms in neighboring chains.
06

Identifying the main intermolecular forces in nylon-66

Based on the analysis of nylon-66's structure, the primary intermolecular force present is hydrogen bonding due to the presence of the amide bond which contains highly electronegative nitrogen and oxygen atoms bonded to hydrogen atoms. Therefore, the correct answer is: (a) hydrogen bonding

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