Engineering Transactions, 60, 2, pp. 171–184, 2012

Effect of Dialkyl Peroxide Blending on Tensile Properties of PLA/PBAT Polymer Alloys

Masahiro NISHIDA
Nagoya Institute of Technology, Department of Mechanical Engineering

Hiroki ICHIHARA
Nagoya Institute of Technology, Department of Mechanical Engineering

Hiroki WATANABE
Nagoya Institute of Technology, Department of Mechanical Engineering

Norio FUKUDA
Headquarters, Aichi Center for Industry and Science Technology

Hiroaki ITO
Industrial Research Center, Aichi Center for Industry and Science Technology

Poly(lactic acid) (PLA) and poly(butylene adipate/terephthalate) (PBAT) were used for
polymer alloys, and the effects of the mixing ratio of PLA and PBAT and the addition of dialkyl
peroxide (compatibilizing agent) were examined. The stress-strain curves of PLA/PBAT and
PLA/PBAT/dialkyl peroxide specimens were measured using a tensile split Hopkinson bar
(Kolsky Bar) method and a universal testing machine. The mixing ratio of PLA and PBAT and
the dialkyl peroxide addition affected the shape of the stress-strain curve behavior. Regardless
of the strain rate, the yield stress decreased and the elongation at break and strain energy
increased with increasing PBAT content when the dialkyl peroxide was used. At high strain
rate, the dialkyl peroxide addition increased the elongation at break and the strain energy, and
changed the fracture surface to a whitened form that was markedly uneven. This result could
explain the improvement in the Izod impact strength.
Keywords: bioplastics, polymer alloys, strain rate effects, tensile split Hopkinson bar, fractography
Full Text: PDF


Copyright © 2014 by Institute of Fundamental Technological Research
Polish Academy of Sciences, Warsaw, Poland