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All Journal EKSAKTA: Journal of Sciences and Data Analysis Jurnal Sains Materi Indonesia Jurnal Bahan Alam Terbarukan Jurnal Sumberdaya Alam dan Lingkungan Journal of Applied Information, Communication and Technology (JAICT) Jurnal Penelitian Pendidikan IPA (JPPIPA) Civil Engineering Journal Indonesian Journal of Chemistry Jurnal Inovator Jurnal Ilmiah Mandala Education (JIME) Jurnal Teknik Kimia ASEAN Journal of Chemical Engineering Kinetika Jurnal Pendidikan dan Teknologi Indonesia Jurnal Pengabdian Masyarakat Indonesia AJARCDE (Asian Journal of Applied Research for Community Development and Empowerment) International Journal of Research in Vocational Studies (IJRVOCAS) Chemical Engineering Journal Storage (CEJS) Makara Journal of Science Makara Journal of Technology ENGAGEMENT: Jurnal Pengabdian Masyarakat Innovative: Journal Of Social Science Research Riwayat: Educational Journal of History and Humanities Serambi Engineering Jurnal Sains Materi Indonesia Jurnal Teknologi Riset Terapan
Abu Hasan
Chemical Engineering Department-State Polytechnic Of Sriwijaya Jl. Srijaya Negara Bukit Besar, Palembang 30139, Indonesia
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COMPARATION OF RUBBER MILLING PROCESS TO PRODUCE NATURAL RUBBER COUMPOUNDS USING MODIFIED AND UNMODIFIED LOCAL CLAY FILLER Hasan, Abu; Aznury, Martha; Purnamasari, Indah; Zaman, Muhammad; Junaidi, Robert; Rahmaniar, Rahmaniar
Jurnal Sains Materi Indonesia Vol 21, No 2: JANUARY 2020
Publisher : Center for Science & Technology of Advanced Materials - National Nuclear Energy Agency

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (706.906 KB) | DOI: 10.17146/jsmi.2020.21.2.5797

Abstract

COMPARISON OF RUBBER MILLING PROCESS TO PRODUCE NATURAL RUBBER COMPOUNDS USING MODIFIED AND UNMODIFIED LOCAL CLAY FILLER. Many researchers have studied the effect of modified clay as filler on rubber compounds for both natural rubber and synthetic rubber. Various chemicals are used as clay modifiers. In the rubber milling process, modified clay is directly used as filler after pretreatment with clay modifier. However, clay modifiers can also be milled together with original clay during the rubber mastication and milling process. Thus both of these methods certainly produce different physical properties, so the comparison of the two rubber milling processes is the focus of this research. The analysis of the curing characteristics and physical properties of vulcanized natural rubber was carried out with a rheometer and physical properties test units. Thermal analysis was carried out using TG/DTA and dispersion of filler on the rubber compound was analyzed by SEM. The results of the curing characteristic of the rubber compound and the physical properties of vulcanization showed that there was an effect due to the comparison of the rubber milling process. Modified clay using JH-S69 is better than JH-S69 milled with original clay and vice versa occurs in PEG 4000 which is used as clay modifier. PEG 4000 which is milled together with original clay produces curing characteristic and physical properties of vulcanization better than pretreatment of clay to be modified clay. This analysis is in line with the analysis using SEM.
KOMPOSIT DENGAN MATRIK SODIUM SILIKAT DAN PENGISI SENG OKSIDA SEBAGAI THERMAL GREASE UNTUK CENTRAL PROCESSING UNIT (CPU) Hasan, Abu
KINETIKA Vol. 9 No. 2 (2018): KINETIKA 01072018
Publisher : Politeknik Negeri Sriwijaya

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Abstract

Sodium silicate has a higher thermal conductivity and lower viscosity than the basic material for making thermal grease that is widely used today, silicon. On the other hand, ceramic materials such as zinc oxide have many advantages compared to metals as thermal grease fillers which are widely used today. Composites with sodium silicate matrix and zinc oxide fillers were studied as thermal grease for central processing units. This research aims to produce thermal grease for CPU that have better quality than those on the market today. Thermal grease was made by mixing nanosized zinc oxide fillers and sodium silicate matrix with filler concentrations of 16 wt%, 18 wt%, and 20 wt% and tested by application-specific test method. The results of the study show an increase in thermal conductivity to the increase in filler fractions. Thermal grease with 20 wt% fillers produces thermal grease with the highest and most stable thermal conductivity.
SIFAT FISIK VULKANISAT KARET DENGAN BAHAN PENGISI VARIASI TANAH LIAT DI BERBAGAI LAPISAN AREA TAMBANG PT. BUKIT ASAM (PERSERO) TBK. Hasan, Abu; Dewi, Erwana; Purnamasari, Indah; Irawan, Dewanda; A.S, Putu Yoga
KINETIKA Vol. 10 No. 1 (2019): KINETIKA 01032019
Publisher : Politeknik Negeri Sriwijaya

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Abstract

This study aims to study the physical characteristics of vulcanized rubber using various clay fillers from layers in the PT. Bukit Asam (Persero) Tbk .. This research was conducted 6 formulas (1,2,3,4,5,6), each variation of clay type INT A2-B1, OBA1, Lower C, INT A1-A2, INT B2-C, INT B1-B2. Then with the same variation carried out the addition of chemicals in the form of JHS-69 and PEG 4000 in each of the 6 formulas as much as 1 phr. The natural rubber used is RSS-1 then rubber is modified and vulcanized along with other process materials in the open mill. Based on the results of the study it has been analyzed that rubber compound number 4 using JH-S69 is better than other rubber compounds, which have a tensile strength value of 17.2 Mpa, elongation at break of 670%, modulus of 300% 4 Mpa, and tear strength 33 kN / m. Whereas the best rubber compound using PEG 4000 is compound number 2 which has a tensile strength value of 16.6 Mpa, elongation at break of 690%, modulus of 300% 2.4 Mpa, and tear strength 28.8 kN / m. From the results of the analysis of the physical properties, the two compounds meet the SNI 0778:2009 standards to be used as shoe soles products.
PAPAN PARTIKEL AMPAS TEBU (Saccharum officinarum) DENGAN PEREKAT HIGH DENSITY POLYETHYLENE Hasan, Abu; Yerizam, Muhammad; Kusuma, Mutmainnah Ningtyas
KINETIKA Vol. 11 No. 3 (2020): KINETIKA 01112020
Publisher : Politeknik Negeri Sriwijaya

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Abstract

The problem regarding the availability of raw materials for the timber industry encourages research on the use of lignocellulosic materials to develop, one of which is bagasse. The large amount of bagasse and plastic waste that is not utilized as waste in the community makes it possible to carry out further processing into particle board. Plastic waste that can be used as an adhesive in the manufacture of particle boards is high density polyethylene (HDPE) plastic. The method used was Hand lay-up, which was arranging the pattern of bagasse fibers randomly and bidirectional crossed, the ratio of adhesive and bagasse fibers 70:30, compressed by varying the pressing time of 15, 30, 45, 60, 75 minutes 150 0C and a pressure of 100 kgf/cm2. The best results from the manufacture of particle board under 60 minutes of pressing, the bidirectional arrangement pattern has better physical and mechanical properties than the random arrangement pattern. Showed the values of crossed bidirectional fiber moisture content is 4,898%, density 0.64 g/cm3, swelling 8.15% , water absorption 21.71% , MOR 483.11 kgf/cm2 and MOE 1740.95 kgf/cm2.
MEKANISME ADSORBEN ZEOLIT DAN MANGANESE ZEOLIT TERHADAP LOGAM BESI (Fe) Hasan, Abu; Yerizam, Muhammad; Yahya, Muhammad Habib
KINETIKA Vol. 12 No. 1 (2021): KINETIKA 01032021
Publisher : Politeknik Negeri Sriwijaya

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Abstract

Iron (Fe) is an essential metal whose presence in certain amounts is needed by living organisms, but in excess amounts it can cause toxic effects. This study aims to determine the effect of optimum contact time and optimum mass variation on Fe metal reduction using zeolite and manganese zeolite adsorbents. In addition, isotherm studies and adsorption kinetics were carried out. The variations in contact time used in this study were 0, 15, 30, 45, and 60 minutes. Meanwhile, the adsorbent mass variations used were 1 and 1.5 grams. From the results of this study it is known that the optimum time for the adsorption of Fe metal is 60 minutes with an adsorbent mass of 1.5 grams, a decrease in concentration of 51.1394% for manganese zeolite adsorbent and 47.6074% for zeolite adsorbent. . The iron ion adsorption process using zeolite and manganese zeolite follows the Freundlich adsorption equation model. The adsorption rates of zeolite on ferrous metals for masses of 1 gram and 1.5 grams tend to follow the second order pseudo kinetics model.
THE INFLUENCE OF MASTICATION TO CURING CHARACTERISTIC OF NATURAL RUBBER AND PHYSICALPROPERTIES OF ITS VULCANIZATES Abu Hasan; Rochmadi Rochmadi; Hary Sulistyo; Suharto Honggokusumo
Jurnal Sains Materi Indonesia Vol 12, No 2: FEBRUARI 2011
Publisher : Center for Science & Technology of Advanced Materials - National Nuclear Energy Agency

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (50.906 KB) | DOI: 10.17146/jsmi.2011.12.2.4590

Abstract

THE INFLUENCE OF MASTICATION TO CURING CHARACTERISTIC OF NATURAL RUBBER AND PHYSICALPROPERTIES OF ITS VULCANIZATES. The research on the mastication that influences the curing characteristic of natural rubber and physical properties of its vulcanizates has been conducted. The research started from rubber mastication with variation of carbon black filler addition into rubber compound. Rubber compound was then measured to identify its curing characteristic using rheometer and tested its viscosity using Mooney viscosity tester. Physical properties of rubber vulcanizates such as abrasion resistance, tear strength, and elongation at break were also measured. The results indicated that curing characteristic tended to decrease, while only scorch time tended to increase from B1, B2, B3 and B4. Elongation at break tended to decrease, while tear resistance and abrasion resistance tended to increase from B1, B2, B3 and B4. Mooney viscosity of the compound also tended to decrease. It can be concluded that B1 is better than B2, B3 and B4. However, if rubber vulcanizates require high tear resistance and abrasion resistance, such as for shoes sole and tread of tire, then B4 is the most appropriate vulcanizate.
Sintesis dan Karakterisasi Na-CMC dari A-Selulosa Serabut Kelapa Sawit Indriani Indriani; Abu Hasan; Anerasari Meydinariasty
Jurnal Pendidikan dan Teknologi Indonesia Vol 1 No 9 (2021): JPTI - September 2021
Publisher : CV Infinite Corporation

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52436/1.jpti.82

Abstract

Na-CMC adalah eter polimer selulosa linier yang digunakan sebagai bahan pengental, pengemulsi dan penstabil. Salah satu bahan dasar pembuatan Na-CMC yaitu serabut kelapa sawit. Serabut kelapa sawit merupakan salah satu hasil samping terbesar yang dihasilkan dalam proses pengolahan minyak kelapa sawit dan dapat dapat dijadikan sebagai sumber selulosa karena mengandung selulosa hingga 59,60%. Tujuan dari penelitian ini untuk mendaptakan komposisi optimal campuran media reaksi isopropanol-etanol dan konsentrasi asam trikloroasetat serta konsentrasi NaOH dengan memvariasikan komposisi media reaksi isopropanol-etanol menjadi 20:80; 40:60; 50:50; 60:40 dan 80:20, sedangkan untuk konsentrasi asam trikloroasetat yaitu 15%, 20% san 25% dan untuk konsentrasi NaOH adlah 15% dan 20%. Didapat bahwa komposisi optimal media reaksi pada proses sintesis Na-CMC terdapat pada campuran isopropanol-etanol 80:20 dengan konsentrasi asam trikloroasetat 25% dan konsentrasi NaOH 20% menghasilkan nilai DS yang tertinggi yaitu sebesar 0,8124 dengan kemurnian dan pH berturut-turut sebesar 99,68% dan 7,9. Na-CMC is a linear cellulose polymer ether used as a thickener, emulsifier and stabilizer. One of the basic ingredients for making Na-CMC is palm fiber. Palm fiber is one of the largest by-products produced in the palm oil processing process and can be used as a source of cellulose because it contains up to 59.60% cellulose. The purpose of this study was to obtain the optimal composition of the isopropanol-ethanol reaction media mixture and the concentration of trichloroacetic acid and NaOH concentration by varying the composition of the isopropanol-ethanol reaction medium to 20:80; 40:60; 50:50; 60:40 and 80:20, while the concentrations of trichloroacetic acid were 15%, 20% and 25% and the concentrations of NaOH were 15% and 20%, respectively. It was found that the optimal composition of the reaction medium in the Na-CMC synthesis process was found in a mixture of isopropanol-ethanol 80:20 with a concentration of 25% trichloroacetic acid and 20% NaOH concentration resulting in the highest DS value of 0.8124 with purity and pH respectively. 99.68% and 7.9.
Vulcanization Kinetics of Natural Rubber Based On Free Sulfur Determination Abu Hasan; Rochmadi Rochmadi; Hary Sulistyo; Suharto Honggokusumo
Indonesian Journal of Chemistry Vol 13, No 1 (2013)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (935.581 KB) | DOI: 10.22146/ijc.21321

Abstract

The determination of free sulfur in the rubber vulcanizates provided significant representation of vulcanization reaction. In this research, the effects of vulcanization temperature, the mixing method of carbon black into rubber, the ingredients mixing sequence and the type of carbon black were studied on masticated and milled natural rubber in which the reaction was observed by un-reacted sulfur determination. The results showed that higher vulcanization temperature provided faster vulcanization reaction and greater reaction rate constant. Similarly, the mixing sequence of ingredient and carbon black into rubber influenced the rate of vulcanization reaction. The subsequent ingredients mixing sequence, in this case, resulted in higher vulcanization rate compared to that of the simultaneous one. However, the mixing method of carbon black into rubber brought small effect on the rate of vulcanization reaction. The type of carbon black applied was observed to influence the reaction rate of vulcanization. Smaller particle sizes of carbon black gave larger reaction rate constant. In this case, the type of carbon black N 330 gave faster vulcanization rate than that of N 660.
The Effect of Ingredients Mixing Sequence in Rubber Compounding upon Vulcanization Kinetics of Natural Rubber: An Autocatalytic Model Study Abu Hasan; Rochmadi Rochmadi; Hary Sulistyo; Suharto Honggokusumo
Indonesian Journal of Chemistry Vol 18, No 4 (2018)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (15.89 KB) | DOI: 10.22146/ijc.25707

Abstract

This study examined the effect of ingredients mixing sequence to the vulcanization kinetics of natural rubber. The effects of mixing temperature, vulcanization temperature, and the carbon black type upon the kinetics were also studied by using rheography and an autocatalysis reaction model approach. The results showed that this model is good in providing information on vulcanization reaction kinetics of natural rubber. High vulcanization temperature resulted in high reaction rate constant. The more black carbon mixed at the beginning of the rubber mixing process, the higher reaction rate constant would be. The mixing of carbon black and rubber chemicals mixed into the rubber subsequently resulted in the higher reaction rate constant compared with that of simultaneously.
The Effect of Rubber Mixing Process on The Curing Characteristics of Natural Rubber Hasan, Abu; Rochmadi, Rochmadi; Sulistyo, Hary; Honggokusumo, Suharto
Makara Journal of Technology Vol. 16, No. 2
Publisher : UI Scholars Hub

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Abstract

This research is aimed at studying the relationship between rubber mixing processes and curing characteristics of natural rubber. The curing characteristic analysis was carried out through a natural rubber formula having been masticated and mixed, followed by curing. As many as four mastication methods were finely applied; each respected four sequences of rubber mixing process. In the first method, rubber was masticated for 5 minutes and then rubber chemicals and carbon black N 330 were simultaneously added. In the second and the third methods, rubber was masticated for 1 minute and then carbon blacks and rubber chemicals were also simultaneously added but using different type of fillers. In the fourth method, rubber was masticated for 3 minutes and then rubber chemicals and carbon black were subsequently added. The additions of rubber chemicals and carbon blacks to the masticated rubber were distinguished by the sequence and time allocated for each mixing process. The carbon blacks were added in two stages by which 10 phr was added first and the remaining 40 phr was added later along with oil. In another method, ratios of the carbon blacks addition (as done in the first and the second stages) were 20:30, 30:20, and 40:10. The examination results showed that rubber mixing process gave an impact on the changes of curing characteristics. They were much affected by the method of carbon black addition. The mixing temperature also had an effect on both curing time and curing rate in which the higher the mixing temperature, the lower the curing time and curing rate. Vulcanization temperature also affected the curing time and curing rate in which the higher the vulcanization temperature, the lower the curing time and the higher the curing rate. Lastly, particle size of carbon black also gave an impact on the curing time and curing rate in which the smaller the particle size, the lower the curing time and the higher the curing rate.
Co-Authors A.S, Putu Yoga Ahmed, Shameem Ahsan, Raquib Aida Syarif Albari, Mauris Ali Ahmad Alifiansyah, Muhammad Fikry Amanah, Tria Rizki Anerasari Meydinariasty Apriantoro, Roni Apriyansah Apriyansah, Apriyansah Arif Bramantyo, Hutama Arifin, Moh Samsul Arza, Tasya Dwi Putri Candra Aprizal Didiek Hari Nugroho Eko Supriyanto Erwana Dewi Fadarina HC Farhan, Ismy Fatahul Arifin, Fatahul Fauzi, Pebi Dian Ghafur, Abd. Haidi Tazaruddin Haliman, Annisa Cendani Hary Sulistyo Hary Sulistyo Hary Sulistyo Hasan, Jordan Hutama Arif Bramantyo Indah Purnamasari Indah Purnamasari INDAH PURNAMASARI Indriani Indriani Irawan, Dewanda Jamil, Maizun Binti Kalsum, Leila Kurnianingsih Kurnianingsih, Kurnianingsih Kurniansyah, Muhammad Harry Kusuma, Mutmainnah Ningtyas Luqita, Syauqi Fajar M. Mar’ie Rizqi Ganisha Martha Aznury Martha Aznury Moniruzzaman Muhammad Yerizam Muhammad Zaman Mustain Mustain Nor, Siti Najdah Binti Mohd Nurrani, Hanny Octhaviana, Vivi Oktaviani, Cantika Cakhya Pramudya, Nabila Salwa Pramuji, Tulus Putra, Aan Ade Putra, Asri Eka Putri, Nabilah Ayunisa Rafit Arjeni Rahmaniar Rahmaniar Rahmaniar, Rahmaniar RD Kusumanto Risdzuan, Aiman Arif Bin Robert Junaidi Robert Junaidi Rochmadi Rochmadi Rochmadi Rochmadi Rochmadi Rochmadi Rochmadi Rochmadi Rochmadi Rochmadi Rochmanto, Raditya Artha Rochmatika, Rizkha Rochmatika, Rizkha Ajeng Ronaldo Rozi, Fathor Rusdianasari Rusdianasari Samosir, Devina Sanchia Sardewi, Tri Selastia Yuliati Selastia, Selastia Selly Ratna Sari Sindung HW Sasono, Sindung HW Slamet Widodo Suharto Honggokusumo Suharto Honggokusumo Suharto Honggokusumo Suharto Honggokusumo Suharto Honggokusumo Syamsul Hidayat, Sidiq Syari, Aida Syaritri, Dwi Thomas Agung Setyawan, Thomas Agung Tri Raharjo Yudantoro Triyono, Liliek Utari Agustina Wahyu Wulandari Wijaya, Satria Agung Wiktasari Wiktasari, Wiktasari Yahya, Muhammad Habib Yohandri Bow Yuliani, Aliyah Yuliati - Yuniar Zaman, Muhammad Zikri, Ahmad