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Use of contrast matching small-angle neutron scattering to monitor the presence of closed porosity in controlled porosity styrene-divinylbenzene resins

Hall, P.J. and Machado, W.R. and Galan, D.G. and Barria, E.B. and Sherrington, D.C. (1996) Use of contrast matching small-angle neutron scattering to monitor the presence of closed porosity in controlled porosity styrene-divinylbenzene resins. Journal of the Chemical Society, Faraday Transactions, 92 (14). pp. 2607-2610. ISSN 0956-5000

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Abstract

A series of styrene-divinylbenzene resins produced with varying amounts of toluene as a porogen have been investigated using contrast-matching small-angle neutron scattering. The results show the existence of some microporosity in the samples that cannot be accessed by a weakly swelling solvent, ethanol. Also, when the amount of porogen used in the production of the samples is low, a significant amount of the macroporosity is closed. The implications of this for the industrial application of these materials is discussed.