The mechanical properties of green-composites based on polylactic acid (PLA) with jute fibers wereinvestigated. A long fiber pellet was developed to obtain a high aspect ratio of residual fiber after injectionmolding. Comparative studies were carried out, where shorter fiber pellets were compounded by differentscrew configurations using a twin-screw extruder. To interpret the results of our mechanical tests, thefiber geometry, dispersion state, and fiber fracture surfaces after tensile testing were analyzed. We foundthat the composites made of short fiber pellet (which suffer high compound intensity), exhibited optimalmechanical performance. Although, compounding with a twin-screw extruder decreased the overallaspect ratio of residual fibers, we observed that it significantly facilitated both the dispersion of the juteyarn to jute bundle and the decohesion of jute bundle to elementary fibers. This fiber separation causedby high intensity mixing led to efficient load transfer from matrix to fiber, and improvement of interfacialstrength. These findings provide us with an insight into the critical parameters required to develop a highperforming jute/PLA composite.
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