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Norma Arisanti Kinasih
Indonesian Rubber Research Institute
Engineering

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Pengaruh suhu vulkanisasi terhadap sifat mekanis vulkanisat karet alam dan karet akrilonitril-butadiena Norma Arisanti Kinasih; Muhammad Irfan Fathurrohman; Dadang Suparto
Majalah Kulit, Karet, dan Plastik Vol 31, No 2 (2015): 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.v31i2.504

Abstract

Natural and acrylonitrile-butadiene rubbers possess different vulcanization characteristics. Selection of the vulcanization system and temperature affects the mechanical properties of vulcanized natural rubber (NR) and acrylonitrile-butadiene rubber (NBR). In the present work, the effect of vulcanization temperature (150, 160, 170 and 180oC) on the mechanical properties of NR and NBR vulcanizates was studied. The effect of different vulcanization system (semi efficient, efficient and sulfur donor) was studied in NR blends, while the effect of different acrylonitrile content (26, 28 and 33 wt %) was studied in NBR blends. The NBR curing characteristics and mechanical properties data showed that vulcanization at low temperature (150oC) was suitable for low acrylonitrile-NBR, whereas that at high temperature (170oC) was suitable for high acrylonitrile-NBR. In addition, the semi efficient system at low temperature vulcanization (150oC) was suitable for natural rubber.Keywords: vulcanization temperature, acrylonitrile, NBR, natural rubber, mechanical properties.ABSTRAKKaret alam dan karet akrilonitril-butadiena memiliki karakteristik vulkanisasi yang berbeda. Pemilihan sistem dan suhu vulkanisasi berpengaruh terhadap sifat mekanis vulkanisat karet alam (NR) dan karet akrilonitril-butadiena (NBR). Pada penelitian ini dipelajari pengaruh suhu vulkanisasi (150, 160, 170 dan 180oC) terhadap sifat mekanis vulkanisat NR dan NBR. Pada NR dipelajari pengaruh sistem vulkanisasi yang berbeda (semi efisien, efisien dan donor sulfur), sedangkan pada NBR lebih difokuskan terhadap pengaruh kandungan akrilonitril yang berbeda (26, 28 dan 33% b/b). Karakteristik pematangan dan sifat mekanik karet NBR menunjukkan bahwa karet NBR dengan kandungan akrilonitril yang rendah lebih sesuai divulkanisasi pada suhu rendah (150oC), sedangkan karet NBR dengan kandungan akrilonitril yang tinggi lebih sesuai divulkanisasi pada pada suhu tinggi (170oC). Vulkanisat karet alam lebih sesuai divulkanisasi menggunakan sistem vulkanisasi semi efisien dengan suhu vulkanisasi sebesar 150oC.Kata kunci: suhu vulkanisasi, akrilonitril, NBR, karet alam, sifat mekanik.
Effect of depolymerized block skim rubber (BSR) on the physical properties of modified asphalt Arief Ramadhan; Adi Cifriadi; Henry Prastanto; Norma Arisanti Kinasih
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

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (30.037 KB) | DOI: 10.20543/mkkp.v34i2.4179

Abstract

The asphalt pavement susceptibility was influenced by traffic load and temperature. Therefore, modified asphalt has been done to improve the asphalt performance. Depolymerized block skim rubber (BSR) was used as asphalt modifier. BSR is a low quality crumb rubber, which made from skim (byproduct of creamed latex). This investigation aims to determine effect of depolymerization of BSR on the physical performance of modified asphalt. Initially, BSR was depolymerized by mechanical action (mastication) with different time of 8, 16, and 24 min. Then, the asphalt modifier, depolymerized BSR was added to asphalt with different ratio 3, 5, 7%. The softening point and mixing time of asphalt were compared with modified asphalt. The performance of modified asphalt showed that asphalt modifiers increased the softening point and mixing time of asphalt. Maximum softening point reached 54.30C by 7% BSR (16 min. of mastication time). The modified asphalt had 25.70C softening point higher than asphalt. It was conclude that depolymerized BSR can increase the performance of asphalt (softening point), although increase the mixing time of it. Moreover, it could give alternative to reduce cost of modified asphalt pavement making.
Ketahanan n-pentana dan sifat mekanis vulkanisat karet perapat dari campuran karet alam/akrilonitril-butadiena dengan kompatibiliser Norma Arisanti Kinasih; Muhammad Irfan Fathurrohman
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

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (706.864 KB) | DOI: 10.20543/mkkp.v32i2.1013

Abstract

The improvement of the compatibility of natural rubber (NR)/acrilonitrile-butadiene rubber (NBR) blend on rubber seal vulcanizate has been done by the addition of chloroprene rubber (CR) or epoxidized natural rubber (ENR) as compatibilizer. Rubber seal compound was made of NR and NBR blend (BN) with CR (BCR), and ENR with epoxy content of 10% (BENR10), 20% (BENR20), 30% (BENR30), 40% (BENR40), and 50% (BENR50). The composition in each formula was homogenized, with comparison of NR:NBR at 40:60, and NR:compatibilizer:NBR at 40:5:55. That compounds were vulcanized with efficient system at 150oC. The addition of CR-compatilizer improved the curing characteristic, compression set, and n-pentane resistance of BN vulcanizate. Meanwhile, the addition of KAE-compatilizer improved the elasticity of BN vulcanizate. BENR elasticity and n-pentane resistance increased in line with the increasing level of epoxy content of ENR.Keywords: rubber seal, compatibilizer, n-pentane resistance, mechanical properties. 
Co-Authors Adi Cifriadi Arief Ramadhan Dadang Suparto Henry Prastanto Muhammad Irfan Fathurrohman