Estudo sobre polímeros sintéticos utilizados como suportes em obras de arte contemporânea: a pintura de Daniel Vasconcelos Melim em membrana termoplástica

• Autor(a) principal: Leite, Maria Coromoto Gomes Correia
• Data de Publicação: 2020
• Tipo de documento: Dissertação
• Idioma: por
• Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
• Texto Completo: http://hdl.handle.net/10451/44826
• topic: Melim, Daniel, 1982-; Arte - séc.20; Pintura; Polímeros sintéticos; Termoplásticos; Análise espetroscópica; Domínio/Área Científica::Humanidades::Artes

Thermoplastic synthetic polymers are present not only in everyday life, but also in the objects of museum collections and works of art, constituting our historical and cultural heritage. Given the experimental impetus of contemporary artists, they used and still use in their works diverse and unconventional materials, often construction materials, such as paints based on acrylic resins used in interior painting; plastic membranes for insulation and cover polyvinyl chloride (PVC); acrylic sheets of methyl polymethacrylate (PMMA) applied in place of common glass; or other plastics such as polyethylene (PE), polypropylene (PP) and polyethylene terephthalate (PET), among many others. It is therefore necessary to identify these polymers, to study their characteristics and their behaviour towards some external agents, such as UV-V radiation, temperature, ambient humidity or even in some cases, liquid water and oxygen. The research presented here aims to identify the plastic used by the Portuguese painter Daniel Vasconcelos Melim as a support for his paintings in acrylic paint; to study its physical and chemical properties and identify the most frequent change phenomena; and still understand the artist's path, as well as his work. For the identification and comparative study of the synthetic polymer used by the artist, simple physical and chemical tests were used: density measurement and solubility tests in different solvents, pyrolysis and flame tests, immersion of the samples in distilled water and pH measurements and the Soxhlet organic solvent extraction method, on samples of thermoplastic membranes of the RENOLIT - SE brand of different years, namely 2011 and 2018. And for a more accurate identification it was applied Ultraviolet-Visible Spectroscopy (UV-Vis), Fourier Transform Infrared Spectroscopy and Attenuated Total Reflection (ATR-FTIR) Aging tests were also carried out on membrane samples for 67 days, at room temperature of 21 oC and at 70 oC in order to identify some alteration phenomena, such as: colour change and loss of mass.