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Siswanto
Program Studi Teknik Mesin, Politeknik Pratama Mulia Surakarta
Agriculture, Biological Sciences & Forestry Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Computer Science & IT Control & Systems Engineering Education Electrical & Electronics Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mathematics Mechanical Engineering

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Efek Pemaparan Komposit High Density Polyethylene (HDPE) Limbah Berpenguat Serat Cantula Agave Terhadap Perubahan Sifat Lentur dan Impak Siswanto; Teguh Wiyono
Politeknosains Vol 19 No Edisi Khusus (2020): Jurnal Politeknosains Volume 19 Edisi Khusus - Juli 2020
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat (LPPM) Politeknik Pratama Mulia Surakarta

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Abstract

Research on composite material title: Effects of High Density Polyethylene (HDPE) Composite Agave Fiber Reinforced Waste on Changing Flexural and Impact Properties, this aims to determine the effect of exposure to changes in mechanical properties of composites. Composites were tested for the flexural and impact properties, in order to determine the surface morphology of the composite fracture, SEM photographs were taken. The composite matrix uses HDPE polymer waste bottles, waste plastic materials are cleaned and ground and sieved into 40-60 mesh. Composite reinforcement uses cantula fibers which are cut into 10 mm lengths. Composites are made by printing using hot press machines, pressing machines 30 bar, temperature 115 0C for 10 minutes, making composites with 40% fiber volume fraction. After the composite is formed, it is cut into pieces based on flexural test specimens using the ASTM D 6272 standard (127 x 12.7 x 3.2 mm) and ASTM D 5941 (80 x 10 x 4.0 mm) impact test specimens. The specimen is then exposed in an open location so that the specimen is exposed to all environmental effects such as sun exposure, rain and wind. The variation of time duration of exposure is 0, 30, 60, and 90 days with an exposure angle of 50. To find out the surface morphology of the broken specimen, SEM photographs were taken. The results of testing on the composite data obtained that the composite without exposure has a flexural strength of 45.93 N / mm2 and an impact strength of 43.13 Kj / m2. After being exposed to composites, the mechanical properties decreased, the lowest flexural strength decreased at 30 days exposure (2.96% reduction), the greatest decrease in flexural strength occurred at 90 days (decreased 5.39%). The decrease in impact strength due to the lowest exposure occurred at 30 days exposure (decrease of 17.41%), the greatest decrease in impact strength occurred at 90 days exposure (decrease of 64.02%).
Rekayasa Mesin Resin Transformer Moulding (RTM) sebagai Mesin Mencetak Spesimen Komposit Siswanto; Teguh Wiyono; Deni Kustianto
Politeknosains Vol 16 No 2 (2017): Jurnal Politeknosains Volume 16 Nomor 2 - September 2017
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat (LPPM) Politeknik Pratama Mulia Surakarta

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RTM engine engineering (Resin Transfer Molding) is aimed to improve the quality of composite materials research in the environment Pratama Mulia Polytechnic Surakarta. Activities of this RTM engine engineering include: Planning, manufacturing, and testing of machinery. making a printing machine with a vacuum method. Material construction machine using steel elbow 50x50 mm, Motor vacuum using Ve280n model with 110-220V / 50-60Hz power 1 HP, Mold using material Allumunium 350 x 350 x 50 mm. After doing the testing machine, it was found that the RTM machine can be used to print fiber-reinforced polyester resin composite with a size of 200 x 200 x 3.2 mm.
Pengaruh Penguat Hibride Partikel Serbuk Arang Sekam Padi dan Kalsit Terhadap Sifat Mekanik pada Komposit Polyester Resin Basmal; Joko Sukarno; Siswanto
Politeknosains Vol 16 No 1 (2017): Jurnal Politeknosains Volume 16 Nomor 1 - Maret 2017
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat (LPPM) Politeknik Pratama Mulia Surakarta

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Abstract

The study entitled "Strengthening Effect of Particle Hibride Charcoal Rice Husk Powder and Mechanical Properties of Calcite Against On Polyester Resin Composites" aims to determine the effect of the volume fraction of filler partkel hibride the mechanical properties of composite properties. Mechanical properties of the composite hibride researched include flexural strength properties of the standard ASTM D 790, Impact strength properties of the standard ASTM D 5941 and ASTM standard fuel properties ktahanan D 635.dan SEM fracture morphology to determine the composite. Matrix composites using Unsaturated Polyester Resin BQTN 157, Filler hibride using rice husk charcoal powder and powder kalisit 60-80 mesh 100-120 mesh with a total weight of the filler fraction of 50%. Percentage ratio between the weight fraction of filler hibride rice husk powder and powder calcite are: 15:35, 20:30, 25: 25, 30:20. MEKP hardener using 1 wt% Matrix Resin. Material is mixed using a mixer rotation of 100 rpm for 5 minutes. Making composite by means poured into the mold by holding time of 30 minutes. Composite specimens given rain water immersion treatment for 20 days. The test results in getting the highest mechanical properties of the composite specimens: The flexural strength 95.54 N / mm2, the impact strength of 5.97 kJ / mm2, and fuel resistance properties rate of 0.10 mm / sec. Lowest mechanical properties is obtained: The flexural strength 84.17 N / mm2, the impact strength of 5.10 kJ / mm2, and fuel resistance properties rate of 0.19 mm / sec.
Pengaruh Rendaman Terhadap Perubahan Sifat Mekanik Komposit Polyester Resin - Partikel Arang Sekam Padi Siswanto; Fahmi Eka Saputra; Basmal
Politeknosains Vol 15 No 2 (2016): Jurnal Politeknosains Volume 15 Nomor 2 - September 2016
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat (LPPM) Politeknik Pratama Mulia Surakarta

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Abstract

Engineering materials utilizing waste Charcoal Husk Rice Particles (PASP) as a filler in the unsaturated polyester resin matrix composite BQTN 157, aims to determine the effect of soaking to changes in mechanical properties of flexural strength and impact strength in the composite specimen. Polyester resin material mixed with a kind of BQTN 157 charcoal husk rice particles (PASP) vf 40%, 1% wt hardener. Material is poured into the mold, holding time 30 minutes. Composites are made based on the test specimen flexural and impact test specimens. Composite given treatment soaking for 150 hours with a variation of the fluid; rain water, mineral water, and water wells with 10 wt% water vinegar. Specimens in doing testing of flexural strength ASTM D 790 standards and impact testing standard ASTM D 5941 to determine the mechanical properties of the composite. Testing Results indicates that the flexural strength of the composite without treatment 35,50 N / mm2, while the composite with the treatment had an average flexural strength: mineral water Soaking 34.53 N / mm2, rain water soaking 34.66 N / mm2, soaking water wells + 10% Vinegar 32.89 N / mm2,. Tests on the impact strength shows that the impact strength of the untreated composites 4,16 kJ / mm2, while composites with bath treatment had an average impact strength as follows: Soaking mineral water 3,62 kJ / mm2, rain water soaking 3,35 kJ / mm2 , well water soaking + 10% Vinegar 2,98 kJ / mm2.
Co-Authors Basmal Deni Kustianto Fahmi Eka Saputra Joko Sukarno Teguh Wiyono