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Gelation of siloxane cross-linked organic molecules |
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| Authors: | A Vainrub F Devreux M Sarkar P D Palasz A N Burgess |
| Institution: | (1) Laboratoire de Physique de la Matière Condensée, Ecole Polytechnique & Centre National de la Recherche Scientifique, 91128 Palaiseau, France;(2) Research Department, ICI Paints, Slough, UK;(3) Research & Technology, ICI Chemicals and Polymers, Runcorn, UK |
| Abstract: | We have studied by 29Si NMR and small angle neutron scattering the cross-linking by formation of siloxane bridges of two amino-epoxy-silane molecules at different concentration in acidic water. We relate our observations to the fact that one of the studied systems never gels, while the second one displays a concentration threshold for gelation that is accounted for by percolation theory. |
| Keywords: | sol-gel process siloxane cross-linking gelation NMR SANS |
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