ROSA, D.S.GRILLO, D.BARDI, M.A.G.CALIL, M.R.GUEDES, C.G.F.RAMIRES, E.C.FROLLINI, E.2016-11-102016-11-102009ROSA, D.S.; GRILLO, D.; BARDI, M.A.G.; CALIL, M.R.; GUEDES, C.G.F.; RAMIRES, E.C.; FROLLINI, E. Mechanical, thermal and morphological characterization of polypropylene/biodegradable polyester blends with additives. <b>Polymer Testing</b>, v. 28, p. 836-842, 2009. DOI: <a href="https://dx.doi.org/10.1016/j.polymertesting.2009.07.006">10.1016/j.polymertesting.2009.07.006</a>. Disponível em: http://repositorio.ipen.br/handle/123456789/26790.0142-9418http://repositorio.ipen.br/handle/123456789/26790The (bio)degradation of polyolefins can be accelerated by modifying the level of crystallinity or by incorporation of carbonyl groups by adding pro-oxidants to masterbatches or through exposure to ultraviolet irradiation. In this work, we sought to improve the degradation of PP by adding cobalt, calcium or magnesium stearate to Ecoflex , PP or Ecoflex /PP blends. The effect of the pro-oxidants on biodegradability was assessed by examining the mechanical properties and fluidity of the polymers. PP had higher values for tensile strength at break and Young’s modulus than Ecoflex , and the latter had little influence on the properties of PP in Ecoflex /PP blends. However, the presence of prooxidants (except for calcium) reduced these properties. All of the pro-oxidants enhanced the fluidity of PP, a phenomenon that facilitated polymer degradation at high temperatures.836-842openAccessbiodegradationpolypropylenestearatesoxidationplasticsArtigo de periódico2810.1016/j.polymertesting.2009.07.006