ELISABETH CARVALHO L. CARDOSO
2 resultados
Resultados de Busca
Agora exibindo 1 - 2 de 2
Capítulo IPEN-doc 25020 Study of flexible films prepared from PLA/PBAT blend and PLA E-beam irradiated as compatibilizing agent2017 - CARDOSO, ELIZABETH C.L.; OLIVEIRA, RENE R.; MACHADO, GLAUSON A.F.; MOURA, ESPERIDIANA A.B.Plastics global annual production exceeds 250 million tons and more than 40% of the total plastic production is used as packaging materials. In recent years polymeric materials derived from biomass have received great attention due to scarce petroleum resources and environmental concerns. PLA is one of the most extensively studied bio-based and bio-compostable aliphatic polyesters; nevertheless, high brittleness and low toughness limits its application. Blending PLA with PBAT (Poly(butylene adipate-co-terephthalate)), an aliphatic-aromatic copolyester, was the solution found due to its high toughness and biodegradability. Differences between PLA and PBAT solubility parameter values lead to the formation of immiscible blends as well as reduction in their mechanical performance besides a poor morphology; so, 5% of pre-irradiated PLA and a previous compatibilized PLA/PBAT (EcovioTM) were added to PLA/PBAT blends in order to improve miscibility phases. Investigations were accomplished on phase morphology (SEM), mechanical properties, thermal behavior and X-ray diffractions (XRD).Artigo IPEN-doc 22470 Development of bio-based foams prepared from PBAT/PLA reinforced with biio-calcium carbonate compatibilized by electron beam radiation2016 - CARDOSO, ELIZABETH C.L.; SEIXAS, MARCUS V.S.; WIEBECK, HELIO; OLIVEIRA, RENE R.; MACHADO, GLAUSON A.F.; MOURA, ESPERIDIANA A.B.