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Evolution of the mechanical properties and estimation of the useful lifespan of poly(lactic acid) based compounds
Author(s) -
Anakabe Jon,
SantamariaEchart Arantzazu,
Eceiza Arantxa,
Arbelaiz Aitor,
Zaldua Huici Ane Miren
Publication year - 2018
Publication title -
polymer international
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.592
H-Index - 105
eISSN - 1097-0126
pISSN - 0959-8103
DOI - 10.1002/pi.5568
Subject(s) - lactic acid , crystallinity , talc , materials science , adipate , glass transition , amorphous solid , arrhenius equation , polymer chemistry , chemical engineering , composite material , polymer , activation energy , organic chemistry , chemistry , genetics , bacteria , engineering , biology
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 T g 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