DEVELOPMENT OF A NEW POLYMER GLASS WITH ENHANCED RESISTANCE TOWARDS SCRATCHES AND SOLVENT FOR CULTURAL HERITAGE

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DEVELOPMENT OF A NEW POLYMER GLASS WITH ENHANCED RESISTANCE TOWARDS SCRATCHES AND SOLVENT FOR CULTURAL HERITAGE

Type de document : Archive ouverte | CHEMCH2014:3rd International Congress on Chemistry for Cultural Heritage

Auteur(s) : Berrebi, Mickaël | Fabre-Francke, Isabelle | Lavédrine, Bertrand | Fichet, Odile

Edité par CCSD

Type de document: info:eu-repo/semantics/conferenceObject ; Conference papers
Langue: en

Date de publication: 2014-07-01

Résumé: International audience. In the particular context of cultural heritage, protective glazing has been the subject of only few studies [1-2]. In addition to the monitoring of temperature, humidity and light in museums, the conditions of conservation for the preservation of cultural heritage, needs the development of a low cost glass with specific properties.Poly(methyl methacrylate) (PMMA) is one of the most widely used compounds in the manufacture of organic glasses. Indeed it has a refractive index (n = 1.491) close to that of glass (n = 1.522), it has a better light transmission and is much lighter and less brittle than glass. Therefore it has been widely applied in conservation for the glassing of artifacts and especially during travelling exhibitions. PMMA is also still used by many artists to produce artworks such as Diasec© (a popular face mounting techniques for photographs), 3D objects and design furnitures. Unfortunately PMMA is very sensitive to abrasion and after a few years this might alter the visual appearance of the artifact. This work shows the possibility to enhance anti-scratch and solvents resistance of PMMA based glass by combining it with polycarbonate (PCR39®) inside Interpenetrating Polymer Network (IPN) architecture. Our specifications require a transparent final material and a preparation without solvent in order to address specific issue of the cultural heritage preservation community. These IPNs are synthesized according to an in situ process. According to the chosen free-radical initiators, the PMMA network is formed in the first place followed by the synthesis of PCR39® network. Rigid transparent (transmission higher than 95%) materials are obtained. Thermomechanical analyses indicate a correct interpenetration of both networks. The scratch and solvents tests show that the addition of PCR39® to PMMA in the IPN improves each of these properties and furthermore the glass ability to filter a part of UV radiations.

Citer la référence: Berrebi, Mickaël , Fabre-Francke, Isabelle , Lavédrine, Bertrand , Fichet, Odile, DEVELOPMENT OF A NEW POLYMER GLASS WITH ENHANCED RESISTANCE TOWARDS SCRATCHES AND SOLVENT FOR CULTURAL HERITAGE, CCSD,

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DEVELOPMENT OF A NEW POLYMER GLASS WITH ENHANCED RESISTANCE TOWARDS SCRATCHES AND SOLVENT FOR CULTURAL HERITAGE

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