Making Polyurethane foam
Making Polyurethane foam: Could someone please tell me where I can find instructions for a Year 11 chemistry prac for making polyurethane foam?
Making Polyurethane foam: Could someone please tell me where I can find instructions for a Year 11 chemistry prac for making polyurethane foam?
Submitted by sat on 09 June 2015
Answer reviewed 23 February 2023
The preparation of polyurethane foam is an interesting and worthwhile demonstration of polymerisation. We have detailed some instructions below, but first it is important to be aware of the hazards that are involved. Polyurethane foam is prepared from components which are commonly available commercially in two parts:
We therefore advise that all precautions be taken to avoid any respiratory or skin exposure to the diisocyanate component when carrying out this reaction.
A site-specific risk assessment should be conducted before carrying out the activity. See the Science ASSIST Risk Assessment Template. We recommend that the reaction should not be conducted in the presence of any student or staff member who has a history of respiratory allergies.
We recommend that this activity be conducted as a teacher demonstration only on a small scale in a working fume cupboard, taking all precautions to prevent skin and respiratory exposure to the diisocyanate component with the following safe handling precautions.
Note: Diisocyanates react with water to produce carbon dioxide and an insoluble polymer. The carbon dioxide generated from this reaction could rupture the container given sufficient exposure to water.
It is recommended that neither part is kept for a period of longer than 3 years.
1 Flynn Scientific Inc. (2014). ‘Polyurethane Foam System, Part A’ Safety Data Sheet, Retrieved from the Flynn Scientific Inc. website: https://www.flinnsci.com/globalassets/flinn-scientific/all-free-pdfs/sds...
2 Flynn Scientific Inc. (2014). ‘Polyurethane Foam System, Part B’ Safety Data Sheet, Retrieved from the Flynn Scientific Inc. website: https://www.flinnsci.com/sds_607.6-polyurethane-foam-system-part-b/sds_6...
3 Safe Work Australia. (2020, July 1). Guide to handling isocyanates, Retrieved from the Safe Work Australia website: https://www.safeworkaustralia.gov.au/doc/guide-handling-isocyanates
Clarke, N. (2016, April 25). ‘Polyurethane Flexible Foams’ (original author D McRobie), retrieved from the Silo Tips website: https://silo.tips/download/polyurethane-flexible-foams
Collegedunia Team, (nd). Polyurethane Foam: Application, Production, Types and Composition, Retrieved (23 February 2023) from the Collegedunia website: https://collegedunia.com/exams/polyurethane-foam-application-production-...