Restauração do patrimônio cerâmico: obtenção e análise de massas polivinílicas processadas por micro-ondas para a recomposição de objetos cerâmicos.

Abstract

This work presents an alternative method for the ceramics restoration that, compared to other practices developed nowadays, promises facilities for structural rearrangement step. It is a product composed of materials generally mentioned in the restoration literature, such as mineral fillers and emulsion of Polyvinyl Acetate (PVA), which is processed by radiation in a conventional microwave oven. The mass polyvinyl proposal was designed from the composition of ceramic masses of two objects chosen for the study of restoration. The main objectives of the research were to analyze the technicç.d1l tr 1\NB Spçal performance of the experimental material, during and after the restoration work, and check the effect of microwave on polyvinyl mixtures, since the adhesive composite is described in the literature as the material susceptible to the photo-oxidation and acidification when subjected to the calorific energy or radiation source. Within this perspective, experimental step involved the monitoring of samples during drying and plastic packaging, application essays masses, coating and removal tests, exams characterization by optical microscopy (OM), scanning electron microscopy (SEM), energy dispersive spectrometry X-ray (EDX), mechanical rheometry (bending test), thermogravimetry (TGA and D-TGA) and Fourier Transform Infrared Spectroscopy (FTIR). The practical tests demonstrated that the experimental material corresponds to practice principles of contemporary restoration, since it is easy to produce, application, removal, distinctiveness, and is adaptable to restore composition of objects. Instrumental analyzes indicated physical qualities and stability for the polyvinyl masses irradiated. Despite the promising results, the research does not provide conclusive, since the experimental material could not be subjected to the accelerated aging test.