Evolution of the mechanical properties and estimation of the useful lifespan of poly(lactic acid) based compounds |
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| Authors: | Jon Anakabe Arantzazu Santamaria‐Echart Arantxa Eceiza Aitor Arbelaiz Ane Miren Zaldua Huici |
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| Affiliation: | 1. Leartiker S. Coop., Markina‐Xemein, Spain;2. Materials + Technologies Group, Chemical and Environmental Engineering Department, Faculty of Engineering, Gipuzkoa, University of the Basque Country UPV/EHU, Donostia‐San Sebastián, Spain |
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| Abstract: | The useful lifespans of a poly(lactic acid)/poly(methyl methacrylate) (PLA/PMMA) 80/20 (wt%) blend and a poly(lactic acid)/dioctyl adipate/talc (PLA/DOA/talc) compound have been estimated by applying an Arrhenius relationship to the evolution of the mechanical properties whilst ageing. The studied PLA based systems showed lower activation energies (ca 8 ? 20 kJ mol?1) than those reported in the literature for other synthetic thermoplastics, indicating lower thermo‐oxidative stability. However, both systems were interesting choices for semi‐durable applications in terms of useful lifespan estimations. The PLA/PMMA blend showed a drastic loss in stiffness at Tg due to its almost amorphous structure whereas, in contrast, PLA/DOA/talc showed acceptable mechanical properties above its glass transition temperature due to its semicrystalline structure. © 2018 Society of Chemical Industry |
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| Keywords: | biopolymers blends polylactide lifespan Arrhenius |
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