PENGARUH VARIASI KONSENTRASI ALKALI (NaOH) PADA PERENDAMAN SERAT RAMI TERHADAP KEKUATAN BENDING KOMPOSIT SERAT RAMI BERMATRIK POLYESTER

BAGUS NOVIANTORO, DIMAS (2020) PENGARUH VARIASI KONSENTRASI ALKALI (NaOH) PADA PERENDAMAN SERAT RAMI TERHADAP KEKUATAN BENDING KOMPOSIT SERAT RAMI BERMATRIK POLYESTER. Skripsi thesis, Institut Teknologi Dirgantara Adisutjipto.

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Abstract

Natural Composite (NACO) is a material that could be developed in Indonesia. Mechanically bonded composites reinforced by natural fibers can be improved by chemical treatments such as the alkaline treatment. It is often used as it is more economical. The purpose of this study was to study the effect of alkaline immersion on the bending properties of hemp fiber reinforced composites. The main ingredient of the research is hemp fiber and transparent polyester resin 108. The hardener used is a MEKPO hardener. The composite was made by hand-lay-up method with a long immersion time of 2 hours. Composites consist of random hemp fiber, a 15% volume fraction of composite fibers with variations in alkali immersion (NaOH) 1.5%, 2%, 2.5%, 3% and 3.5%. The flexural test specimen refers to ASTM D 790-03. The fracture section is examined to identify the fracture mechanism. The highest bending test result was obtained with an alkaline concentration of 1.5% at 81.902 MPa. Based on the observation of the macro structure, there were a type of fiber pull out and fiber break on the composite.

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