ANALISIS PENGARUH KOMPOSISI SERAT RAMI BERMATRIKS POLYESTER RESIN TERHADAP SIFAT MEKANIK MATERIAL

Sulistiyanto, Muchlis (2022) ANALISIS PENGARUH KOMPOSISI SERAT RAMI BERMATRIKS POLYESTER RESIN TERHADAP SIFAT MEKANIK MATERIAL. Sarjana (S1) thesis, Universitas Islam “45” Bekasi.

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Abstract

Composite is a combination of two or more materials that have different properties, the difference can be seen from the two main elements, namely fiber as a filler and fiber binder called the matrix. This study used hemp fiber with a polyester resin matrix and a catalyst as a binder. Treatment of flax fiber by soaking in 5% alkaline solution (NaOH) for 60 minutes to remove lignin adhering to the fiber. Composite printing method with hand lay-up. The matrix used in this research is polyester resin. The composition of hemp fiber with polyester resin is 4% : 96%, 8% : 92% and 12% : 88%. The mechanical properties tested are tensile strength. The tensile test refers to the ASTM D638 type 1 standard. The test results obtained the highest tensile strength in the specimen with a composition of 12% which has a stress of 48.33 MPa and a strain of 3.951%, the modulus of elasticity is 2.943 GPa. The specimen with 8% composition had a stress of 41.88 MPa and a strain of 2.816% on a composite with an elastic modulus of 2.859 GPa. Specimen with a composition of 4% has a stress of 23.24 MPa and a strain of 1.665 with an elastic modulus of 2.290 GPa. The results of the physical properties test showed: the physical properties of the hemp fiber composite polyester matrix had an average density of 1.21 g/cm3, the percentage of water absorption was 3.82% on average and the proportion of swelling (swelling) was on average 0.93%. These physical properties are included in the JIS A5908 classification.

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