Urea-methanal polymerisation

Description

In this experiment, urea is used as a starting point for a condensation polymerisation to form a thermosetting polymer.

Credits

:
This is an experiment from the Practical Chemistry project, developed by the Nuffield Foundation and the Royal Society of Chemistry.
urea-methanal-polymerisat...



Apparatus Chemicals

The teacher will need:

Eye protection: goggles

Disposable nitrile gloves (for handling the polymer)

Access to a fume cupboard visible to the class

Measuring cylinder, 100 cm3

Throw-away containers with secure lids, at least 2 (Note 1)

Dropping pipette

Glass stirring rod

Object of simple shape for making suitable mould (Note 2)

Bunsen burner (optional)

Tongs (optional)

Quantities for one demonstration:

Methanal solution (formalin), 37 - 40%, (TOXIC), 20 cm(Note 3)

Urea (carbamide), 10 g

Sulfuric acid, concentrated (CORROSIVE),
 1 cm(Note 4)

Plasticene

Aluminium foil

Refer to Health & Safety and Technical notes section below for additional information.

 






In this experiment, urea is used as a starting point for a condensation polymerisation to form a thermosetting polymer.

ADDITIONAL INFORMATION

This is a resource from the Practical Chemistry project, developed by the Nuffield Foundation and the Royal Society of Chemistry. This collection of over 200 practical activities demonstrates a wide range of chemical concepts and processes. Each activity contains comprehensive information for teachers and technicians, including full technical notes and step-by-step procedures. Practical Chemistry activities accompany Practical Physics and Practical Biology.