Engineering Transactions, 59, 1, pp. 23–30, 2011
10.24423/engtrans.158.2011

Evaluation of Dynamic Compressive Properties of Pla/Pbat Polymer Alloys Using Split Hopkinson Pressure Bar Method

M. NISHIDA
Department of Mechanical Engineering, Nagoya Institute of Technology
Japan

H. ICHIHARA
Department of Mechanical Engineering, Nagoya Institute of Technology
Japan

N. FUKUDA
Aichi Industrial Technology Institute
Japan

Poly(lactic acid) (PLA) is a biodegradable biomass polymer. Polymer blends or polymer alloys have been used to overcome its brittleness. Because poly(butylene/adipate/terephthalate) (PBAT) is a ductile and biodegradable polymer, PLA/PBAT polymer alloys can potentially exhibit high impact strengths. Different mixing ratios of PLA/PBAT (80:20, 70:30 and 60:40) and the addition of dialkylperoxide as compatibilizing agent for each mixing ratio have been examined. The stress-strain curves of the PLA/PBAT specimens (observed using a scanning electron microscope) were measured using a split Hopkinson pressure bar (Kolsky bar) and a universal testing machine. The PBAT ratios and addition of dialkylperoxide affected the stress-strain curves. Yield stress decreased with increasing PBAT ratios. Addition of dialkylperoxide did not change the yield stress of specimens when PLA:PBAT = 80:20. At high strain rates, the addition of dialkylperoxide clearly reduced yield stress and Young’s modulus when PLA: PBAT = 70:30 and 60:40.
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DOI: 10.24423/engtrans.158.2011