Question 35 (Textile Engineering & Fibre Science)
Consider the following assertion [a] and reason [r] and choose the most appropriate answer
[a] Nylon 6 is polymerized using only single monomer caprolactum
[r] Synthesis of Nylon 6 is basically an addition polymerized
|(A)||[a] is right [r] is wrong|
|(B)||[a] is right [r] is right|
|(C)||[a] is wrong [r] is wrong|
|(D)||[a] is wrong [r] is right|
Answer / Solution
Frequently Asked Questions | FAQs
How is nylon 6 preparation and uses?
Nylon 6, also known as polyamide 6, is a synthetic polymer that is commonly used in a wide range of applications due to its excellent mechanical properties, high strength, and good chemical resistance. The preparation of Nylon 6 involves a polymerization reaction, typically carried out through two main methods: ring-opening polymerization and condensation polymerization.
Ring-opening polymerization: In this method, a cyclic monomer called caprolactam, which contains six carbon atoms, is used as the starting material. The caprolactam monomers undergo a ring-opening polymerization reaction, where the lactam ring is opened by breaking the nitrogen-carbon bond, and the resulting monomers polymerize to form long chains of Nylon 6. This polymerization process is typically carried out at high temperature (around 250-300°C) in the presence of a catalyst, such as water or an acid, to facilitate the polymerization reaction.
Condensation polymerization: In this method, a diamine and a diacid, both containing six carbon atoms, are used as the starting materials. The diamine and diacid react to form amide bonds, and the resulting polymer chain grows through the formation of additional amide bonds, accompanied by the elimination of water molecules as a byproduct. This polymerization process is typically carried out at lower temperatures (around 220-250°C) in the presence of a catalyst, such as phosphoric acid or a metal salt.
Once Nylon 6 is prepared, it can be processed into various forms, such as fibers, films, sheets, and molded parts, to be used in a wide range of applications, including:
Textiles: Nylon 6 fibers are widely used in textiles, such as apparel, carpets, and upholstery, due to their excellent tensile strength, abrasion resistance, and durability.
Automotive parts: Nylon 6 is used in the manufacturing of various automotive parts, such as fuel lines, air intake manifolds, and engine covers, due to its high heat resistance, chemical resistance, and mechanical strength.
Electrical and electronic components: Nylon 6 is used in the production of electrical and electronic components, such as connectors, switches, and circuit breakers, due to its good electrical insulating properties and mechanical strength.
Packaging materials: Nylon 6 films and sheets are used in packaging materials, such as food packaging and protective packaging, due to their excellent barrier properties against moisture, oxygen, and other gases.
Consumer goods: Nylon 6 is used in various consumer goods, such as sports equipment, toys, and household items, due to its toughness, durability, and versatility.
Industrial applications: Nylon 6 is used in various industrial applications, such as gears, bearings, and conveyor belts, due to its high strength, wear resistance, and self-lubricating properties.
Overall, Nylon 6 is a versatile and widely used polymer with a broad range of applications in various industries due to its excellent mechanical properties, chemical resistance, and heat resistance.