Nylon Synthesis kit for Students

Quick Answer: The nylon synthesis kit for students is a practical kit for the ‘nylon rope trick’, in which a thread of nylon is drawn continuously from the boundary between two liquids that do not mix. It is titled for student use, so the reaction is carried out at the bench by the class rather than only watched as a teacher demonstration.

Letting Students Make the Polymer Themselves

Most students first see nylon made as a teacher demonstration. This kit is titled for students, meaning the reaction is intended to be done at the bench by pairs or small groups under supervision. Holding the tweezers and watching their own thread of polymer grow out of the beaker makes the idea of joining monomers into long chains far more concrete than a textbook diagram.

The chemistry is interfacial polymerisation. One monomer, a diamine, is dissolved in water; the other, a diacid chloride, is dissolved in an organic solvent that does not mix with water. The two meet only at the boundary, where they react to form a film of polyamide. Pulling the film upwards exposes fresh boundary, so the reaction keeps going and the thread keeps forming until a reagent runs out.

For a focused demonstration of one named polymer, the Nylon 6-10 preparation kit is titled for nylon 6,10 specifically. Whichever kit is used, the reagents are hazardous in concentrated form, so the practical belongs in a well-ventilated lab with goggles and gloves, and the nylon should be rinsed with water before anyone handles it.

Specifications

Care & Handling

• Wear goggles and chemical-resistant gloves; both monomer solutions irritate or burn skin and eyes.
• Keep the organic solvent away from any heat source and work with good ventilation.
• Rinse the nylon thread thoroughly in water before it is handled with bare hands, since unreacted reagents cling to it.
• At the end, swirl the remaining two layers together so the leftover monomers form solid polymer, then dispose of everything as the safety data sheets direct.

Applications

• A polymers lesson in which students make nylon and compare it with a natural polymer such as wool or silk
• Showing condensation polymerisation, with hydrogen chloride as the small molecule eliminated at each link
• A simple investigation into how long a thread can be drawn before the reagents run out
• Science clubs and open days where students join in a memorable practical under close supervision

Why Choose LabEquip

Secondary and college chemistry teachers who want every student to make a polymer, not just watch one being made, are the buyers of this kit. LabEquip lists it under chemistry lab equipment; tell us your group numbers through the contact page.

Frequently Asked Questions

How does the nylon rope trick work?

Two monomers are dissolved in liquids that do not mix. They meet and react only at the boundary, forming a thin film of nylon. Lifting the film away exposes a fresh boundary, so new polymer forms continuously and a long thread can be drawn out.

Is the nylon made in class safe to touch?

Not straight away. The thread carries traces of unreacted monomer and solvent, which can irritate skin. Rinse it well in water and let it dry before handling it without gloves.

Why is this a condensation polymerisation?

Each time a diamine molecule joins a diacid chloride, a small molecule, hydrogen chloride, is released as the amide link forms. Polymerisation that releases a small molecule at each step is called condensation polymerisation.

Can students do this practical at their own benches?

Yes, with supervision, eye protection, gloves and good ventilation. Teachers usually dispense the two solutions into small beakers so that students never handle the stock bottles.

What is the difference between this kit and the Nylon 6-10 preparation kit?

Both are built around the same interfacial nylon reaction. This kit is titled for student practical work, while the Nylon 6-10 kit names the polymer made. Choose by whether the lesson is a class practical or a focused demonstration.

Why do the two layers not mix?

One monomer is dissolved in water and the other in a non-polar organic solvent. Water and non-polar solvents are immiscible, so they form separate layers with a sharp boundary where the reaction takes place.

Last Updated: September 2026