Urea-methanal polymerisation. Methanal solution is added to a beaker containing urea (white) and stirred. Drops of sulphuric acid are added to the beaker and the solution turns opaque before a hard white solid is formed. This is condensation polymerisation reaction in which water is eliminated as urea and methanal molecules combine. | |
Licence : | Droits gérés |
Crédit : | Science Photo Library / RHYS LEWIS & MINH TAN PHAM, AHS, DECD, UNISA |
Model Release : | Non requis |
Durée : | 59 Secondes |
Aspect ratio : | 16/9 |
Restrictions : | - |