Credit: RHYS LEWIS & MINH TAN PHAM, AHS, DECD, UNISA/SCIENCE PHOTO LIBRARY

Caption: 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.

Release details: Model release not required. Property release not required.

Keywords: acidification, chemical, chemistry, condensation polymerisation, demonstration, exothermic, experiment, formaldehyde, formalin, methanal, one person, plastic, reaction, resin, school science, science education, solid, thermosetting polymer, urea, urea-formaldehyde, urea-methanal polymerisation

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Urea-methanal polymerisation

K004/4565 Rights Managed

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Duration: 00:00:59.18

Frame size: 1920x1080

Frame rate: 25

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Format: QuickTime, Photo JPEG 100%, progressive scan, square pixels

File size: 1.1G

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Capture format: Sony FS700

Codec: Apple ProRes 422 HQ

Interlaced: Yes

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