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Frontal polymerization of acrylic monomers for the consolidation of stone

机译：丙烯酸单体的正面聚合以固结石材

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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.
机译：在文化遗产领域，聚合物产品主要用于巩固石材。然而，聚合化合物的主要问题与它们的大分子性质有关，聚合物难以渗透可能具有非常小的直径的孔内。这些考虑是原位聚合的起点。根据该技术，不是将预先形成的聚合物，而是将单体引入到石材中，并在随后的步骤中将其就地聚合。前沿聚合（FP）是一种特殊的技术，其中利用了单体放热反应向聚合物转化释放的热量，以促进形成能够传播和自我维持反应的热移动前沿。在目前的工作中，FP是在石材的孔内进行的，结果得出结论：在无机材料的存在下，热锋面仍然处于活动状态，该无机材料会部分散发聚合过程中释放的热量。另外，与传统的聚合方法相比，FP的一些最新应用也得到了讨论，用于原位固结和保护石材。

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