Reologi, sifat aging, termal, dan swelling dari campuran EPDM/NR dengan bahan pengisi carbon black N220

Yuniari, Arum; Nurhajati, Dwi Wahini; Dewi, Indiah Ratna; Setyorini, Ike

doi:10.20543/mkkp.v32i1.905

Cited by 4 publications

(8 citation statements)

References 6 publications

(9 reference statements)

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“…Oleh karena itu, penyimpanan kompon perlu mendapatkan perhatian khusus dikarenakan reaksi vulkanisasi akan tetap berjalan secara lambat sehingga dapat mempengaruhi kualitas dari kompon karet [1]. Pengaruh penyimpanan terhadap kualitas karet diantaranya berubahnya nilai viskositas Mooney [4], [5], kestabilan dan karakteristik fisis [6], terjadinya fenomena bloom dari sulfur pada permukaan kompon [7], thermo-oxidative aging [8], re-aglomerasi filler pada kompon [9], maupun permasalahan dispersi aditif pada proses berikutnya [3].…”

Section: Pendahuluanunclassified

Pengaruh Waktu dan Suhu Penyimpanan Kompon Karet terhadap Karakteristik Vulkanisasi

Syabani,

Suharyanto,

Agustian

et al. 2023

JTek

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A rubber compound is an intermediate product resulting from mixing rubber with other additives before being molded through a vulcanization process. Frequently, there is a delay between the compounding process and vulcanization, therefore proper storage procedures must be prepared. The presence of a vulcanizing agent, activator, and accelerator in the compound allows the vulcanization reaction to occur during the storage period. This study aims to analyze the effect of the storage time and temperature of rubber compounds on rubber vulcanization characteristics. The rubber compound is stored at room temperatures of 25oC and 32oC. On the 1st, 3rd, and 5th day of storage, the compounds were tested using a rheometer to obtain vulcanization parameter data. The values of MH, ML, ts2, tc90, cure rate index (CRI), and effective torque of each treatment were studied. The results showed that the storage time of the compound affected each of the observed parameters. In the range of 5 days, the longer time indicates the formation of polysulfide crosslinks in the rubber polymer chain network. Higher storage temperature also faster reaction rate during storage. The increasing number of cross-links resulting a longer induction period dan vulcanization time, lower CRI, and effective torque.

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Section: Pendahuluanunclassified

Pengaruh Waktu dan Suhu Penyimpanan Kompon Karet terhadap Karakteristik Vulkanisasi

Syabani,

Suharyanto,

Agustian

et al. 2023

JTek

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“…Penambahan berbagai aditif dapat mempengaruhi kondisi bawaan ini, dalam hal ini penambahan filler. Begitupula dengan proses vulkanisasi karet juga akan menyebabkan kompon matang dan mengurangi swelling karena terbentuknya jejaring ikatan silang (Yuniari et al 2016). Akan tetapi, media yang agresif dapat melakukan penetrasi lewat gap tersebut dan menyebabkan berkembangnya volume dan bertambahnya berat sampel, hal ini yang disebut sebagai fenomena swelling pada karet.…”

Section: Gambar 1 Perubahan Nilai Swelling Index Terhadap Waktu Peren...unclassified

Pengaruh Geothermal Silica terhadap Ketahanan Pelarut dari Komposit Karet Ditinjau dari Karakteristik Swelling dan Crosslink Density

Syabani

Agustian

Pambudi

et al. 2022

bptkspk

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Karet jenis poliisoprena, styrene butadiene rubber dan polybutadiene rubber dapat menghasilkan produk karet dengan karakteristik mekanik yang baik dan berbiaya rendah. Akan tetapi, jenis karet tersebut tidak memiliki ketahanan terhadap minyak yang baik. Penggunaan filler dapat memperbaiki kelemahan ini dengan memberikan interaksi antara filler dan karet sehingga memperbaiki struktur jejaring karetnya. Penelitian ini dilakukan untuk mempelajari pengaruh penggunaan as-given geothermal silica (AGS) dan silika komersial dalam jumlah tertentu sebagai filler terhadap nilai swelling dan crosslink density kompon karet. Vulkanisat karet disiapkan menggunakan alat two roll mill dan press molding. Sampel diuji swelling menggunakan dua jenis pelarut pada suhu yang berbeda, yaitu n-Pentana pada suhu kamar dan oli pada suhu 100oC. Nilai crosslink density didekati dengan tiga metode yaitu perhitungan modulus, pendekatan sarkawi dan persamaan flory-rehner. Hasil penelitian menunjukan jika vulkanisat karet yang diperkuat dengan AGS memiliki nilai crosslink density yang lebih tinggi dibandingkan chemisil. Sampel komposit memiliki ketahanan yang baik pada pelarut n-Pentana pada suhu kamar. Akan tetapi, kedua vulkanisat menunjukan nilai swelling yang tinggi saat berkontak dengan oil pada suhu 100oC.

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“…The higher solubility of many curatives in NR than EPDM could reduce the crosslink density of EPDM, NR is highly crosslinked, and EPDM is poorly crosslinked. Many attempts to improve cure compatibility had been made such as using compatibilizer, accelerators, and controlling the migration of curative [8][9].…”

Section: ■ Introductionmentioning

confidence: 99%

“…The sequence and technique of rubber blending also influence the cure characteristics and mechanical properties of the blends [12]. This study was done by controlling the migration of curative as the method from previous researchers [8][9]. The blending of EPDM/NR by controlling the migration of curative give better cure characteristics and mechanical properties than simple blending [7].…”

Section: ■ Introductionmentioning

confidence: 99%

“…The EPDM/NR blends had been studied by some researchers with methyl methacrylate-butadienestyrene (MBS) [2], maleic anhydride (MAH) as compatibilizer [8], MBTS/ZDEC [9], TBBS [5,14], MBT [2,8,15], MBTS [15], TMTD as accelerators [2,7,11,15], and controlling the migration of curative [5,9,13]. Based on our knowledge, no research has been published about the influence of different accelerator on EPDM/NR blend by controlling the curative migration with maleic anhydride as the compatibilizer.…”

Section: ■ Introductionmentioning

confidence: 99%

See 1 more Smart Citation

The Blending of EPDM/NR with Maleic Anhydride as Compatibilizer: Comparing the Effect of Accelerators on Cure Characteristic and Mechanical Properties

Mayasari¹,

Setyorini²,

Yuniari³

2019

Indones. J. Chem.

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The blending of ethylene propylene diene monomer/natural rubber (EPDM/NR) needs much attention because of their incompatibility. In this work, the influence of accelerator type on cure characteristics and mechanical properties of 60/40 EPDM/NR blend was investigated. The compounds were prepared by controlling the migration of curative and using maleic anhydride as the compatibilizer. Three types of accelerators were studied: 2,2-dithiobis(benzothiazole) (MBTS), the combination of MBTS and tetramethyl thiuram disulfide (TMTD), and n-tert-butyl-2-benzothiazolesulfenamide (TBBS). The cure characteristic, mechanical properties, and morphology of the composites had been investigated by rheometer, tensile testing machine, hardness durometer and scanning electron microscope (SEM). Blending of EPDM/NR with various accelerator gave different composite characteristics. MBTS, used in single or binary accelerator system, provided good mechanical properties. TBBS gave the longest scorch time, the lowest crosslink density and poor mechanical properties, except tear strength. Binary accelerator, MBTS/TMTD, provided the lowest processing time and the highest cure rate, but not significantly different from MBTS. Binary accelerator gives the best aging resistance and compatibility blend. These results correspond well with SEM micrograph. From the study, it can be concluded that binary accelerator system was the proper accelerator for EPDM/NR blend.

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Reologi, sifat aging, termal, dan swelling dari campuran EPDM/NR dengan bahan pengisi carbon black N220

Abstract: Reologi, sifat aging, termal, dan swelling dari campuran EPDM/NR dengan bahan pengisi carbon black N220 Rheology, aging, thermal and swelling properties of carbon black N220-filled EPDM/NR

Cited by 4 publications

References 6 publications

Pengaruh Waktu dan Suhu Penyimpanan Kompon Karet terhadap Karakteristik Vulkanisasi

Pengaruh Waktu dan Suhu Penyimpanan Kompon Karet terhadap Karakteristik Vulkanisasi

Pengaruh Geothermal Silica terhadap Ketahanan Pelarut dari Komposit Karet Ditinjau dari Karakteristik Swelling dan Crosslink Density

The Blending of EPDM/NR with Maleic Anhydride as Compatibilizer: Comparing the Effect of Accelerators on Cure Characteristic and Mechanical Properties

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