Comparative studies of mechanical properties of poly (e-Caprolactone) and poly (lactic acid) blends reinforced with natural fibers

Abstract

The mechanical properties of polycaprolactone (PCL) and polylactic acid (PLA) blend reinforced with palm press fibers from Dura and Tenera palm tree species have been comparatively studied. A twin screw extruder was used to melt blend the composites after which test specimens were produced using injection molding machine. Dicumyl peroxide (DCP) was used as a cross linker in the blends. The composites mechanical performance was tested using the universal tensile strength tester and impact strength testing machines. Field Emission Scanning Electron Microscope (FESEM) was used to study fiber/matrix adhesion. The flexural modulus of the composites increased by 98 % while impact strength increased by 52 % when treated fibers were used as reinforcement in the blend. FESEM micrographs of the blend showed two phase structure in the absence of DCP. The incorporation of DCP resulted in good interfacial adhesion as revealed by the micrographs and evidenced in the improved mechanical properties.