Purpose-This purpose of the research is to investigate the process of manufacturing LDPE recycle thermoplastic composites with reinforcement oil palm empty fruit bunch (OPEFB) biomass microfillers. Design/Methodology/Approach-Methods of physical and chemical modification of OPEFB fibers into the LDPE matrix and the addition of some compatibilizer such as MAPE and xylene process through melt blending can improve mechanical properties, electrical properties, biodegradability, and improve the morphology of composites. Research Limitations/Implications-These composites are prepared by the following matrix ratio: filler (70:30)% and filler size (63, 75, 90, and 106) mm. The LDPE plastic is crushed to a size of 0.5-1 cm, then pressed with hot press free heating for 5 min and with a pressure of 10 min at 145°C. Based on the characterization obtained, the tensile strength and the high impact on the use of 106 mm filler is 13.86 MPa and 3,542.6 J/m 2 , and thermal stability indicates the degradation temperature (T 0) 497.83°C. FT-IR analysis shows the presence of functional groups of cellulose and lignin molecules derived from TKKS collected in the composite. Practical implications-Based on the characterization obtained, this composite can be applied as furniture material and vehicle dashboard. Originality/value-Composites obtained from recycle of LDPPE plastics waste has some advantages such as good compatibility and high tensile strength. This composite used the OPEFB filler whose size is in micrometer, and so this product is different from other products.

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