Mechanical, thermal and morphological characterization of polypropylene/biodegradable polyester blends with additives
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Polymer Testing
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Resumo
The (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.
Como referenciar
ROSA, 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. Polymer Testing, v. 28, p. 836-842, 2009. DOI: 10.1016/j.polymertesting.2009.07.006. Disponível em: http://repositorio.ipen.br/handle/123456789/26790. Acesso em: 30 Dec 2025.
Esta referência é gerada automaticamente de acordo com as normas do estilo IPEN/SP (ABNT NBR 6023) e recomenda-se uma verificação final e ajustes caso necessário.