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Natural Zeolite as Substitution Filler on the NBR/EPDM Composite: Characteristics of Swelling Resistance and Compression Set noor maryam setyadewi; Ike Setyorini; hesty eka mayasari
Jurnal Teknologi Proses dan Inovasi Industri Vol 5, No 2 (2020): Vol. 5, No. 2, November 2020
Publisher : Balai Riset Dan Standardisasi Industri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36048/jtpii.v5i2.6555

The resistance of rubber materials to solvents and compression resistance need to be studied in order to determine the proper conditions of use and storage. In this research, we will study the effect of natural zeolite as a filler substitution on the swelling characteristics and compression resistance of Nitrile Butadiene Rubber (NBR)/Ethylene Propylene Diene Rubber (EPDM) composites. The zeolite filler was varied based on the amount and treatment (5 phr and 10 phr with and without modification). The NBR/EPDM composites were made using a two-roll mill and vulcanized using a hydraulic press. Furthermore, the composites were tested for resistance to immersion (swelling) according to ISO 1817 using IRM 903, hexane, and toluene. The compression resistance testing is carried out according to ISO 815 with a compression test apparatus. From the research it is known that zeolite can be a suitable filler substitution for NBR/EPDM composites. The 10 phr modified zeolite is the most suitable filler substitution to increase immersion resistance and compression resistance for NBR/EPDM composites

Efek ukuran, bentuk dan konsentrasi partikel precipitated calcium carbonate (PCC) yang ditambahkan pada sifat mekanik komposit karet alam Ihda Novia Indrajati; Indiah Ratna Dewi; Ike Setyorini
Majalah Kulit, Karet, dan Plastik Vol 29, No 1 (2013): Majalah Kulit, Karet, dan Plastik
Publisher : Center for Leather, Rubber, and Plastic Ministry of Industry, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20543/mkkp.v29i1.218

ABSTRACTThe objectives of this research was to study the effect of particle size, shape andconcentration of PCC on mechanical properties of natural rubber composites, i.e. tensilestrength (Ts) and elongation at break (Eb) at original and aging conditions. Two kinds of PCCwere used, PCCL (local, size 12 μm, uncoated) and PCCD (commercial, size 0.03-0.06 μm,stearate coated). PCCL was pre-treated by applying stearic acid. PCCLA was characterized withFTIR, TG/DTA thermal analysis, and morphological test using SEM. The loading of PCC were2.5; 5.0; 7.5; 10.0 and 12.5 phr respectively. Natural rubber composites were compounded usinglaboratory scale two roll mill. The incorporation of PCCLA or PCCD into rubber matrixincreased Ts and Eb. Both Ts and Eb initially increased continued up to the maximum point thendecreased. The maximum point of Ts and Eb of PCCLA were given on 10 phr, while of PCCD wereon 10 phr and 5 phr resepectively. PCCLA with its cubical particle shape gave higher Ts and Ebthan those PCCD with its needle-like shape, eventhough the particle size was larger. Agingincreased tensile and elongation, because of excessive crosslinking. The characeristic of theinterfacial adhesion between rubber matrix and PCC particle was estimated by Ts value, andproved that the Ts of PCCLA higher than those of PCCD.Keywords: PCC, mechanical properties, natural rubber composites, particle size and shapeABSTRAKTujuan penelitian ini adalah mempelajari pengaruh ukuran partikel, bentuk dan konsentrasiPCC terhadap sifat mekanik komposit karet alam yang meliputi tegangan putus (Ts) danperpanjangan putus (Eb) pada kondisi awal dan pengusangan. PCC yang digunakan yaitu PCCL,(produk lokal, ukuran partikel 12 μm, tanpa pelapis) dan PCCD, (komersial, ukuran partikel0,03-0,06 μm, dilapisi stearat). PCCL diaktivasi menggunakan asam stearat. KarakterisasiPCCLA dilakukan dengan FTIR, analisa termal TG/DTA dan uji morfologi dengan SEM.Konsentrasi PCC yang digunakan berturut-turut 2,5; 5,0; 7,5; 10,0 dan 12,5 phr. Komposit karetalam dibuat menggunakan two roll mill skala laboratorium. Penambahan PCCLA maupun PCCDmeningkatkan tegangan putus dan perpajangan putus komposit. Kenaikan konsentrasi PCCLAmaupun PCCD dalam matriks karet alam menaikkan tegangan putus hingga maksimum dankemudian turun. Nilai maksimum tegangan putus dan perpanjangan putus PCCLA berturut-turutdiberikan pada konsentrasi 10 phr sedangkan PCCD pada 10 phr dan 5 phr. Partikel PCCLAberbentuk kubus memberikan tegangan putus dan perpanjangan putus lebih tinggi daripadaPCCD dengan bentuk partikel jarum, meskipun ukuran partikelnya lebih besar. Pengusangankomposit karet alam telah meningkatkan nilai tegangan putus dan perpanjangan putus yangdisebabkan oleh proses pembentukan ikatan silang lanjutan pada komposit. Karakteristik adhesilapisan antar muka matriks karet dan partikel PCC, diestimasi dengan nilai tegangan putusnya,dan terbukti bahwa tegangan putus PCCLA lebih tinggi daripada PCCD.Kata kunci: PCC, sifat mekanik, komposit karet alam, bentuk dan ukuran partikel

The blending of NBR/EPDM with montmorillonite as compatibilizer: The effect of different accelerator Hesty Eka Mayasari; Agung Wirapraja; Ike Setyorini
Majalah Kulit, Karet, dan Plastik Vol 36, No 1 (2020): Majalah Kulit, Karet, dan Plastik
Publisher : Center for Leather, Rubber, and Plastic Ministry of Industry, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20543/mkkp.v36i1.5951

The rubber blend is widely used in industry because of its excellent properties. In this study, Nitrile Butadiene Rubber (NBR) was blended with Ethylene Butadiene Monomer Rubber (EPDM) using montmorillonite as the compatibilizer. Various kinds of accelerators from different accelerator group (DPG, MBT, CBS, TMTD, and ZDEC) were employed into this blend. This research aimed to study the effect of the different accelerators on the curing characteristic, mechanical, and swelling properties of the NBR/EPDM blends. The result findings showed that DPG gives the longest scorch and optimum curing time. DPG also gave the lowest torque differences, cure rate index, and also the rate constant. While TMTD gave the fastest optimum curing time and also the highest torque differences, cure rate index, and rate constant. The other accelerator gave the curing characteristics among them. The MBT gave the highest tensile, elongation, and tear strength. Based on this research, the TMTD as secondary accelerator was the suitable accelerator for improving the curing characteristic properties and MBT as primary accelerator for improving the mechanical properties of NBR/EPDM.

Cara pengolahan limbah cair brown crepe untuk menurunkan bahan pencemar Sri Sutyasmi; Ike Setyorini; Prayitno Prayitno
Majalah Kulit, Karet, dan Plastik Vol 34, No 2 (2018): Majalah Kulit, Karet, dan Plastik
Publisher : Center for Leather, Rubber, and Plastic Ministry of Industry, Indonesia

Tujuan dari penelitian ini adalah untuk mengolah limbah cair brown crepe agar bisa menurunkan beban pencemar. Limbah cair brown crepe diolah dengan menggunakan 3 model pengolahan yaitu dengan pengolahan primer dan adsorpsi, pengolahan dari bak penampung langsung ke sand filter, dan pengolahan primer yang dilanjutkan ke sand filter. Hasil uji laboratorium menunjukkan bahwa penggunaan adsorben arang tempurung kelapa dapat menurunkan beban pencemaar untuk percobaan 1: COD 75,91%, BOD 73,94%, TSS 95,07% dan N-Amonia 91,23%. Percobaan 2: COD 91%, BOD 95%, TSS 84%, dan N-Amonia 61%. Percobaan 3: COD 65%, BOD 65%, TSS 88% dan N-Amonia 81%. Dari ketiga percobaan semua dapat menurunkan beban pencemar, namun yang paling efektif adalah percobaan 2 karena bisa menurunkan beban pencemar COD dan BOD paling tinggi. Variasi debit yang digunakan pada percobaan 2 tidak mempengaruhi penurunan beban pencemar.

Natural Zeolite as Substitution Filler on the NBR/EPDM Composite: Characteristics of Swelling Resistance and Compression Set noor maryam setyadewi; Ike Setyorini; hesty eka mayasari
Jurnal Teknologi Proses dan Inovasi Industri Vol 5, No 2 (2020): Vol. 5, No. 2, November 2020
Publisher : Balai Riset Dan Standardisasi Industri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36048/jtpii.v5i2.6555

The resistance of rubber materials to solvents and compression resistance need to be studied in order to determine the proper conditions of use and storage. In this research, we will study the effect of natural zeolite as a filler substitution on the swelling characteristics and compression resistance of Nitrile Butadiene Rubber (NBR)/Ethylene Propylene Diene Rubber (EPDM) composites. The zeolite filler was varied based on the amount and treatment (5 phr and 10 phr with and without modification). The NBR/EPDM composites were made using a two-roll mill and vulcanized using a hydraulic press. Furthermore, the composites were tested for resistance to immersion (swelling) according to ISO 1817 using IRM 903, hexane, and toluene. The compression resistance testing is carried out according to ISO 815 with a compression test apparatus. From the research it is known that zeolite can be a suitable filler substitution for NBR/EPDM composites. The 10 phr modified zeolite is the most suitable filler substitution to increase immersion resistance and compression resistance for NBR/EPDM composites

Effect of Bi2O3 on the properties of linier low density polyethylene (LLDPE)/natural rubber compound (NRC) composites Dwi Wahini Nurhajati; Umi Reza Lestari; Ike Setyorini
Majalah Kulit, Karet, dan Plastik Vol 36, No 1 (2020): Majalah Kulit, Karet, dan Plastik
Publisher : Center for Leather, Rubber, and Plastic Ministry of Industry, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20543/mkkp.v36i1.6128

The use of thermoplastic natural rubber (TPNR) has spread for many applications such as in footwear, hoses, seals, and automobiles. This increase is in line with the environmental awareness to produce materials that can be recycled. In this paper, the making of TPNR for car floor mat was studied. Bi2O3 filler was added to modify the performance of TPNR for car floor mat. In this study, the effects of Bi2O3 filler on the properties of linear low-density polyethylene (LLDPE)/natural rubber (NR) composites had been investigated. The weight ratio of LLDPE/NR was varied at 90/10; 80/20; 75/25; and 70/30. Bi2O3 filler loading was varied at 0; 20; 40; and 50 phr. The increase in NR and Bi2O3 filler reduced the tensile strength, elongation at break, and tear resistance, but increased the hardness and density of the composites. Compared to similar imported products, the samples prepared in this study showed higher values for all mechanical properties (tensile strength, elongation at break, tear resistance) but lower values in density. Scanning electron microscopy (SEM) micrograph of LLDPE/NR 75/25 composites either with or without the addition of 20 phr Bi2O3 filler displayed homogeneity of the mixture.

Kinetika vulkanisasi dan sifat mekanis komposit acrylonitrile butadiene rubber (NBR) Arum Yuniari; Ike Setyorini; Hesty Eka Mayasari
Majalah Kulit, Karet, dan Plastik Vol 32, No 2 (2016): Majalah Kulit, Karet, dan Plastik
Publisher : Center for Leather, Rubber, and Plastic Ministry of Industry, Indonesia

The aim of this research was to study the effect of vulcanization temperature on mechanical properties and curing kinetics of NBR composites. The composites were formulated by using two types of carbon black i.e. N-330 and N-774. The curing kinetics was determined using Moving Die Rheometer. The network formation processes were related to torque and time. The vulcanizates were obtained by compression molding in a hydraulic press at 150°C and 160°C. The mechanical properties observed include tensile strength, elongation at break, hardness, and tear strength. Kinetics studies were approached by Arrhenius equation and the reaction mechanism was assumed following first order reaction. The results showed that curing kinetics can be approached by the equation from the rheometer data. The surface area of carbon black strongly influenced the mechanical properties and rate constant (k) of NBR composite. Carbon black N-330 can be used as a desirable reinforcing filler which gave a higher mechanical properties than the other type of carbon black.Keywords: curing kinetics, NBR, temperature, mechanics.

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