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All Journal TEKNIK Rekayasa Mesin Semesta Teknika Media Mesin: Majalah Teknik Mesin JTM-ITI (Jurnal Teknik Mesin ITI) International Journal of Economics, Business and Accounting Research (IJEBAR) Abdi Masya Jurnal Pengabdian Masyarakat Bhinneka JAMU : Jurnal Abdi Masyarakat UMUS
Kuncoro Diharjo
Universitas Sebelas Maret Surakarta
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Journal : Rekayasa Mesin

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Pengaruh Fraksi Volume Filler terhadap Kekuatan Bending dan Ketangguhan Impak Komposit Nanosilika – Phenolic Diharjo, Kuncoro; Elharomy, Ischiadica; Purwanto, Agus
Jurnal Rekayasa Mesin Vol 5, No 1 (2014)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

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Abstract

The objective of this research is to investigate the effect of filler volume fraction on bending strength and impact toughness of nanosilica-phenolic composites. The research materials used were nanosilika powder, LP-1Q-EX phenolic resin, MEXPO catalyst and P-EX promotor. In this research, the filler volume fraction of nanosilica were varied into 10-60%. The composites were produced by using a hand lay-up method. All specimens were post cured at 100ËšC for 60 minutes. The specimens were conducted with universal testing machine and impact izod testing machine. The fracture surfaces of the specimens were observed by using scanning electron microscopy (SEM). This result showed that the addition of nanosilica increased the bending strength and impact toughness. The maximum bending strength and impact toughness occured on the specimens whose 30% of nanosilica (97,01 MPa and 8134,70 kJ/m ). SEM images showed better interaction of filler and matrix at 30% volume fraction of nanosilica.Keywords : composite, nanosilica, phenolic, bending, impact
Pengaruh Kandungan Dan Ukuran Serbuk Genteng Sokka Terhadap Ketahanan Bakar Komposit Geopolimer Diharjo, Kuncoro; Kusharjanta, Bambang; P Tarigan, Roy Aries; Andhika, Albert Raga
Jurnal Rekayasa Mesin Vol 4, No 1 (2013)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

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The objective of this research is to investigate the effect of particle content and grain size of Sokka roof tile powder on the burning endurance of the composite of Sokka roof tile powder - ripoxy R-802.The materials used were a Sokka roof tile powder (SGS), ripoxy R-802 resin, MEKPO catalyst and P-EX promotor. The Sokka roof tile powder was generated from the rejected Sokka roof tile which was crushed into powder. The powder was sieved to result in three size variances, which were mesh 80 retained in mesh 100 (177μm-149μm), mesh 150 retained in mesh 200 (99μm-74μm), and breaking away from mesh 200 (≤74μm). Prior to getting mixed with the resin, SGS was heated in an oven for 45 minutes in the temperature of 105oC. Afterwards, the powder was mixed with ripoxy R-802 resin for 3 minutes. The variances of SGS content were determined to be 10%, 20%, 30% and 40% composition. Making composite was conducted by press mould. Fixed composites was given post curing treatment in the temperatures of 80oC for 120 minutes. The burning testing on the composite was conducted on the basis of the standard of ASTM D-635. The indicator of burning endurance was determined by the data of time of burning (TOB) and rate of burning (ROB). The TOB resulted from the time of ignition and the ROB resulted from the time of fire propagation time in the composite. The results of this research are as follows: (1) the addition of SGS can improve the burning endurance of the composite of SGS-ripoxy R-802 as indicated by the increase in the TOB but the decrease of ROB due to the addition of the content of SGS; (2) the small size of the particle of SGS can increase the burning endurance of the composite of SGS-ripoxy R-802 as signified by the increase in the TOB but the decrease in the ROB due to the small size of the particle of SGS which breaks away from mesh 200 (≤74μm).
Co-Authors AGUS PURWANTO Albert Raga Andhika Arif Setyo Nugroho Bambang Kusharjanta Bandi Bandi, Bandi Dewanto Harjunowibowo Dewi Ratna Nurhayati Dody Ariawan Drajat Tri Kartono Ischiadica Elharomy J Pramana Gentur Sutapa, J Pramana Gentur Jamal Wiwoho Jihad, Bagus H. Lasinta Ari Nendra Wibawa Ravik Karsidi Roy Aries P Tarigan Sawitri, Andini Desi Sigit Hidayat Nuri, Sigit Hidayat Siti Supeni Slamet Riyadi Solikhah, Efi Nikmatu Subarkah, Johny Sudarja Sudarja, Sudarja Totok Suwanda Triyono Wahyu Purwo Raharjo Wijang Wisnu Raharjo