The name “Nylon” was coined by DuPont. Originally intended to be called "No-Run" to emphasize its durability, the name was changed to avoid potential claims. "Nyl" is arbitrary, and "on" is a suffix commonly found in fibers like rayon and cotton.
Synthesis of Adipic Acid from Cyclohexanone: Cyclohexanone is converted to cyclohexanol, which is then deprotonated. The process continues with the use of potassium permanganate (KMnO₄), a strong oxidizing agent, which cleaves the carbon-carbon bond. Protonation follows, yielding adipic acid.
Preparation of Sebacoyl Chloride: Sebacoyl chloride is synthesized by reacting sebacic acid with thionyl chloride in excess. After the reaction, distillation removes any residual thionyl chloride, leaving sebacoyl chloride.
During the polymerization process, the hydroxyl group of the carboxyl end of one monomer reacts with the hydrogen from the amine group of another monomer, releasing a water molecule. This process forms strong covalent bonds between the monomers.
Nylon fibers are highly durable due to strong hydrogen bonding between the chains. The nitrogen-bound hydrogens form bonds with the carbonyl oxygen of adjacent chains. These intermolecular hydrogen bonds are much stronger than typical dipole-dipole interactions, creating tightly bound fibers and making nylon exceptionally strong.
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