Epoxy monomers consolidant for lime plaster cured via a redox activated cationic polymerization |
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| Institution: | 1. Department of Applied Science and Technology, Politecnico di Torino, Corso Duca degli Abruzzi 24, 10129 Torino, Italy;2. Department of Structural, Geotechnical and Building Engineering, Politecnico di Torino, Corso Duca degli Abruzzi 24, 10129 Torino, Italy;1. University of Vienna, Department of Physical Chemistry, Währinger Strasse 42, 1090 Wien, Austria;2. Institute of Physics, National Academy of Sciences of the Republic of Belarus, F. Scorina Avenue 68, 220012 Minsk, Belarus;1. Department of Cartographic Engineering, Geodesy and Photogrammetry, High School of Civil Engineering (UPV), 46022 Valencia, Spain;2. Department of Architectural Projects, High School of Architecture (UPV), 46022 Valencia, Spain;3. Area of Cartographic Engineering, Geodesy and Photogrammetry, Polytechnic High School of Lugo (USC), 27002 Lugo, Spain;1. Department of Solid State Physics, Indian Association for the Cultivation of Science, Jadavpur, Kolkata 700032, India;2. Department of Physics, Jadavpur University, Kolkata 700032, India;3. Department of Physics, National Institute of Technology, Rourkela, Orissa 769008, India;4. Department of Optical and Imaging Science & Technology, School of Engineering, Tokai University, Kanagawa 2591292, Japan |
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| Abstract: | Epoxy resins, widely used in conservation, still remain controversial materials. Considering some of the drawbacks that currently limit the application of epoxy consolidants, we present the application of the cationic ring opening polymerization as a novel method to cure the epoxy monomer in the restoration field. The cationic polymerization was carried out through a redox system based on the reduction of the iodonium salt in the presence of ascorbic acid catalyzed by a copper salt. The use of this initiator system for carrying out a suitable consolidant for lime plaster is considered. First, the film properties of the cured films were investigated. Then, the formulation was applied on a sample of plaster and its compatibility was verified. Its effectiveness as a consolidant product is explored through the evaluation of chromatic changes, mechanical strength, morphology of the re-aggregated material, and changes of the surface properties. |
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| Keywords: | Epoxides Consolidants Plaster Cationic polymerization Redox initiators |
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