ON- POLYMERS - ezio martuscelli

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a) Vinyl Polymers---------------------- b) Acrylic resins--------------------- c) Diene Polymers ---------------------- d) Polyurethanes---------------------- e) Alkyd resins----------------------- f) Epoxy resins ---------------------- FIGURE 10: Name and chemical structure of monomers and of repetitive units of polymers that are the constituents of the most common synthetic binders. a), Vinyl polymers, ( top: vinyl alcohol and poly vinyl alcohol; bottom: vinyl acetate and polyvinyl acetate ); b), acrylic resins ( top, acrylic esters and polyacrylates ), ( bottom, meta acrylic esters and poly meta-acrylates; c), diene polymers, butadiene and polybutadiene; d) Polyurethanes, di-isocianate and diol, polyurethane; e) Alkyd resins, ( top: fat acid, polyol and aromatic di-carboxylic acid ), ( bottom: alkyd resins ); f) Epoxy resins, ( top: di-epoxy monomer and di-amine ), ( bottom: epoxy resin crosslinkable ) [16].
FIGURE 11: Molecular structure of the most used synthetic binders for artistic paints and varnishes. A ) Alkyd resin based on glycerol; B) Vinyl resin ( polyvinylacetate ); C ) Acrylic resin: polyacrylate; D ) Acrylic resin: poly-meta-acrylate [19]. The reproductions of three modern paintings based on the utilization of acrylic binders and varnishes are shown in figure 12 [21,22,23]. B ) Plastics in items of historical and cultural interest Plastics represent an important part of our cultural heritage also for the role they had as components of artifacts, of the latest years of nineenth century and of the twentieth century, of historic, scientific and technological relevance [24]. Items produced in plastics or rubber like materials ( dolls, toys, radios, records, gramophones, clocks, fountain pens, jewells, combs, car and aircraft components, electric and electronic devices, etc. ) are becoming increasingly present in museum collections essentially because they are a witness of: 1 ) the evolution of: --- science; technology and industry;--- an innovative industrial design; --- the production of artefacts with new advanced functions; 2 ) events relevant for the history of peoples and nations.
Page 1 and 2: WITH THE GROWTH OF POLYMER INDUSTRY
Page 3 and 4: Early attempts in using plastics as
Page 5 and 6: FIGURE 8: Sculpture in epoxy resin
Page 7: Such a new products very soon began
Page 11 and 12: This phase of imitation and substit
Page 13 and 14: vibration of the recording stylus w
Page 15 and 16: iv) Plastic applications in the sec
Page 17 and 18: FIGURE 21: Left, Handsome mahogany
Page 19 and 20: Objects in plastics attesting event
Page 21 and 22: REFERENCES 1 ) E. Martuscelli, La C

ON- POLYMERS - ezio martuscelli

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