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The artist Jordi Teixidor is one of the leading exponents of twentieth century Spanish abstract art. In recent years, he has used a synthetic polymer as a support for his art work, namely polypropylene. The behaviour of this material in combination with layers of oil paint has not been studied until now. One of the objectives of this study was to chemically characterise the material present in Jordi Teixidor s work, using FT-IR spectroscopy, in order to be able to examine the behaviour of this set of materials after undergoing cycles of accelerated aging. After subjecting the samples to temperature and relative humidity cycles and ultraviolet radiation, their physico-mechanical behaviour was determined via tensile and bend tests, with the results being processed further by means of spectroscopic techniques and colour measurements. It was found that the possible migration of the additives present in the PP support and the gradual degradation of the materials could affect the adherence between the paint layers in the future., We would like to thank Ms Laura Osete and Ms Marisa Martinez, of the Instituto de Restauracion del Patrimonio at the Universitat Politecnica de Valencia and The Language Centre of The Department for International Relations and Cooperation (UPV). This study forms part of the HAR2008-03444 project, funded by the Office of the Secretary-General for Science and Technology Policy, part of Spain's Ministry for Science and Innovation.