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TitleCharacterization of EVA/PLA blends when exposed to different environments
Author(s)Moura, I.
Botelho, Gabriela
Machado, A. V.
Issue date2014
JournalJournal of Polymers and the Environment
Abstract(s)EVA/PLA blends compatibilized with EVAg- PLA grafted copolymers synthesized by reactive extrusion, through transesterification reaction between ethylenevinyl- acetate (EVA) and polylactide (PLA) using titanium propoxide (Ti(OPr)4) as catalyst, were characterized when exposed to different environments. Stability to UV radiation was assessed exposing the samples to a Xenon lamp, which simulates the sun UV spectrum and the biodegradability was evaluated by biochemical oxygen demand (BOD) in a closed respirometer. Exposed samples were removed periodically and analyzed by several analytical techniques, such as, FTIR, DSC, rheology and tensile tests. The results obtained evidenced that UV radiation induces structural modifications, which affect substantially rheological and mechanical properties. Moreover, the blend with higher amount of copolymer exhibits lower photo durability and greater biodegradability. From the environmental point of view, these new materials are very promising for application with short lifetime, like packaging.
Publisher versionThe original publication is available at
AccessRestricted access (UMinho)
Appears in Collections:IPC - Artigos em revistas científicas internacionais com arbitragem

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