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Making polyurethane foams from microemulsions |
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| Authors: | Christian Ligoure Michel Cloitre Christille Le Chatelier Fabrice Monti |
| Affiliation: | a Matière Molle et Chimie, UNRS CNRS-ESPCI 7167, ESPCI, 75231 Paris Cedex 05, France b Laboratoire des Colloïdes, Verres et Nanomateriaux, UMR CNRS-UMZ 5587, Université Montpellier 2, 34095 Montpellier Cedex 05, France c Physicochimie des Polymères et des Milieux Dispersés, UMR 7615, ESPCI, 10 rue Vauquelin, 75231 Paris Cedex 05, France |
| Abstract: | A remarkable correlation exists between the degree of expansion of polyurethane foams and the structure of the reacting premixes. Polyurethane foams obtained from reacting premixes containing microemulsions are highly expanded. The expansion rate is proportional to the volume fraction of microemulsion in the premix. The stability of premixes with and without microemulsion is completely different suggesting distinct creaming mechanisms. We apply this idea to synthesize polyurethane foams from microemulsions successfully. This approach can be used to rationalize the design of polyurethane formulations leading to highly expanded foams. |
| Keywords: | Polyurethane Foams Microemulsion |
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