Nylon Rope Trick

The Nylon Rope Trick demonstrates interfacial polymerization, where nylon is formed at the boundary between two immiscible solutions: aqueous 1,6-diaminohexane and adipoyl chloride dissolved in cyclohexane. A continuous strand of nylon can be pulled from the liquid interface, creating a dramatic visual display of polymer formation.

1. Pour 25 mL of 5% aqueous 1,6-diaminohexane into a crystallizing dish.
2. Carefully layer 25 mL of 5% adipoyl chloride in cyclohexane on top, ensuring the two solutions do not mix.
3. At the interface, a thin film of nylon will form.
4. Using forceps, grasp the nylon film and gently pull upward in a steady motion.
5. Wind the continuous nylon thread around a test tube or roller to collect the polymer.

Nylon Rope Trick - Wisconsin Mrsec (Education):

Carolina Science - Nylon Synthesis Chemistry Demo:

📄 Nylon Rope Trick - University of Washington: https://chem.washington.edu/lecture-demos/nylon-rope-trick

• Compare interfacial polymerization with bulk polymerization methods.

• Adipoyl chloride is corrosive and a lachrymator - avoid inhalation and skin contact.
• Cyclohexane is flammable and malodorous—keep away from flames and work in a well-ventilated area.
• 1,6-diaminohexane is corrosive - wear gloves, goggles, and a lab coat.
• Use an absorptive pad to contain spills and dispose of chemicals properly.

• Why does nylon form at the interface between the two layers? (The monomers react only at the boundary where they come into contact, producing a thin polymer film.)
• What type of reaction produces nylon in this demonstration? (Condensation polymerization, forming amide bonds.)
• Why is this demonstration called the “Nylon Rope Trick”? (Because a long strand of nylon can be pulled continuously like a rope.)
• What are some real-world applications of nylon? (Clothing, ropes, fishing line, engineering plastics.)