Problem 32 - Arihant Objective Approach to Organic Chemistry for IIT JEE and NEET all Medical Entrances Part 4

Question

Caprolactum is the monomer of: (a) melamine (b) dacron (c) nylon-6 (d) all of these

Step-by-Step Solution

Answer

Caprolactum is the monomer of nylon-6.

Step 1: Understand the Question

The exercise asks us to identify which polymer is formed from the monomer caprolactum. We need to analyze if caprolactum is associated with melamine, dacron, nylon-6, or all of them.

Step 2: Recall Polymer Basics

Recall that polymers are large molecules made by linking monomers in repeating patterns. Caprolactum is a specific monomer that polymerizes to form a unique polymer.

Step 3: Identify the Polymer Formed by Caprolactum

Caprolactam is specifically known to be the monomer that polymerizes to form nylon-6, a well-known synthetic polymer used in the textile industry and for various industrial applications.

Step 4: Eliminate Incorrect Options

- Melamine is a monomer used to make melamine-formaldehyde polymer, not related to caprolactam. - Dacron is a polymer made from terephthalic acid and ethylene glycol, not related to caprolactam. - Caprolactam is not the monomer for all these polymers, only for nylon-6.

Step 5: Arrive at the Correct Answer

After considering the information, we conclude that caprolactum is the monomer of nylon-6.

Key Concepts

Monomers

Monomers are the building blocks of polymers, functioning as the essential units that join together to form large, complex molecules. Think of them as the individual links in a chain. The process of forming polymers from monomers is known as polymerization, which involves chemically binding the monomers in long, repeating sequences. This chemical reaction can occur in various ways, such as addition polymerization or condensation polymerization.

In addition polymerization, monomers join by adding together without releasing byproducts. Conversely, condensation polymerization involves the combination of monomers with the loss of small molecules like water or alcohol. Both methods result in materials with a wide range of properties suited for different uses.

• Polymers are crucial in producing various everyday products, such as plastics, fibers, and rubbers.
• Each polymer has unique characteristics determined by its monomer structure.
• Understanding monomers is key to grasping how polymers like nylon-6 are formed and functionally applied.

As we dive into caprolactam next, remember that it is a specific type of monomer crucial for making a well-known polymer.

Caprolactam

Caprolactam is a specific monomer used extensively in the production of synthetic fibers, particularly nylon-6. This monomer is a lactam, which is a cyclic amide that undergoes ring-opening polymerization. The structure of caprolactam consists of a seven-membered ring, which includes an amide group essential for its unique properties.

During the polymerization process, the ring structure of caprolactam opens and links with other caprolactam molecules. This reaction results in long chains, forming the polymer known as nylon-6. Caprolactam’s significant role in this process is primarily due to its balanced properties, allowing for efficient and scalable production.

• It offers excellent thermal stability, making it suitable for various applications.
• Caprolactam helps create durable nylon fibers used in textiles and industrial products.
• The process is eco-friendly compared to other polymerization techniques because it does not usually involve significant byproducts.

Understanding caprolactam provides valuable insight into how nylon-6 is manufactured and why it is widely used.

Nylon-6

Nylon-6 is a well-known and widely used synthetic polymer derived from the monomer caprolactam. It is known for its versatility, strength, and elasticity, making it an ideal choice for various applications, from clothing fabrics to industrial materials.

Thanks to its chemical structure, nylon-6 possesses several advantageous properties. It is highly resistant to abrasion and chemicals, holds up well under tension, and can be easily dyed, enhancing its appeal in textiles.

• Nylon-6 is prominently used in the fashion industry for products such as stockings, athletic wear, and other clothing items.
• In the industrial sector, it finds applications in producing gears, bearings, and other mechanical components due to its toughness.
• Its recyclability and strength also support its use in engineering plastics, where durability and environmental sustainability are crucial factors.

Nylon-6's diverse applications highlight its robust nature, establishing it as a pivotal material in both fashion and industry.