In-depth study of mechanical properties of poly(lactic acid) / poly(butyleneadipate-co-terephthalate)/ nanosilica blend nanocomposites

The present study evaluates the effect of adding different contents of nanosilica nanoparticles on themechanical properties of mechanical properties of poly(lactic acid) / poly(butylene adipate-coterephthalate)/(PLA/PBAT) (۹۰/۱۰, ۷۵/۲۵, and ۵۰/۵۰ w/w) blends. Various theoretical models wereutilized to describe the observed mechanical behavior of the prepared blend nanocomposites.Scanning electron microscopy revealed that ۷۵/۲۵ blend has the smoothest surface. Also,transmission electron microscopy confirmed a matrix–droplet morphology for all the ۹۰/۱۰ and ۷۵/۲۵blends and a co-continuous morphology for the ۵۰/۵۰ blends. Adding chain extender (CE) in theblends improved Young's modulus, yield strength, and elongation-at-break to a particular loading ofCE (۲ phr), while these properties were diminished after introducing more CE. Also, the mostimprovements in the yield strength (۴۵%) and Young's modulus (۳۵%) were seen for the PLA/PBAT(۷۵/۲۵ w/w) containing ۲ phr CE and ۵ phr HPL NS particles. Besides, a good agreement wasobserved for experimental values and theoretical models for all samples

کلیدواژه ها:

PLA ، PBAT ، Blending ، nanosilica particles ، Mechanical properties