Vicini, Silvia and Mariani, Alberto and Princi, Elisabetta and Bidali, Simone and Pincin, Silvia and Fiori, Stefano and Pedemonte, Enrico and Brunetti, Antonio (2005) Frontal polymerization of acrylic monomers for the consolidation of stone. Polymers for Advanced Technologies, Vol. 16 (4), p. 293-298. eISSN 10991581. Article.
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Polymeric products are largely used for consolidation of stone in the field of cultural heritage. Nevertheless, the main problem of polymeric compounds is related to their macromolecular nature, it being difficult for a polymer to penetrate inside the pores which may have a very small diameter. These considerations are the starting points for in situ polymerization. According to this technique, not the pre-formed polymer, but the monomer is introduced into the stone and it is polymerized in situ in a subsequent step. Frontal polymerization (FP) is a particular technique in which the heat released by the exothermal reaction of monomer to polymer conversion is exploited to promote the formation of a hot traveling front able to propagate and self-sustain the reaction. In the present work, FP is performed inside the pores of the stone and the results lead to the conclusion that the hot front is still active in the presence of an inorganic material which dissipates partially the heat released during the polymerization. In addition some recent applications of FP are discussed in comparison with the traditional polymerization for the in situ consolidation and protection of stones.
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