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Determination of the Blowing Agent Distribution in Rigid Polyurethane Foam

Magdalena Svanström (Institutionen för kemisk miljövetenskap) ; Olle Ramnäs (Institutionen för kemisk miljövetenskap)
Journal of Cellular Plastics Vol. 32 (1996), p. 159-171.
[Artikel, refereegranskad vetenskaplig]

The amount and distribution of blowing agent in rigid polyurethane foam were determined by several methods, which are described and compared. A method for solvent extraction with subsequent gas chromatographic analysis was developed and found to be advantageous for CFC-blown foam along with a combustion method (the Schoniger method), where the chloride ions formed were determined by titration. The solvent extraction method was successfully applied to blowing agents in CFC-free foams as well. Three methods involving heating and weight-loss determination were evaluated. They are easy to use, but corrections for thermal decomposition of the polymer are needed. About half of the total amount of CFC-11 in the investigated polyurethane foams from district heating pipes was found to be dissolved in the polymer matrix.

Denna post skapades 2006-10-18. Senast ändrad 2016-08-15.
CPL Pubid: 22837


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Institutioner (Chalmers)

Institutionen för kemisk miljövetenskap (1900-2003)


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Chalmers infrastruktur