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.
Highlights
ABSTRAK Peningkatan kompatibilitas pencampuran karet alam (KA) dan akrilonitril-butadiena (NBR) pada vulkanisat karet perapat dilakukan dengan menambahkan kompatibiliser karet kloroprena (CR) atau karet alam epoksidasi (KAE)
blend on rubber seal vulcanizate has been done by the addition of chloroprene rubber
Rubber seal compound was made of natural rubber (NR)
Summary
Bahan penelitian yang digunakan untuk pembuatan kompon terdiri dari KA jenis SIR 20 dari PTPN 8, NBR (Krynac 3345) dengan kandungan akrilonitril 33% dan viskositas Mooney 45 ML1+4 (100°C) dari Lanxess, KAE dengan kandungan epoksidasi sebesar 10%, 20%, 30%, 40%, dan MAJALAH KULIT, KARET, DAN PLASTIK Vol 32 No 2 Desember Tahun 2016: 99-110. 50% telah diperoleh dari penelitian sebelumnya (Kinasih & Fathurrohman, 2015a), CR, antiozonan, antireversi dan homogenizer berasal dari Rhein Chemie, carbon black N-770 dari Cabot, antioksidan, pelunak, ZnO, asam stearat, belerang dan bahan pencepat seperti: CBS, TMTD, dan DTDM berasal dari suplier lokal dan n-pentana dari Merck. Peralatan Penelitian Peralatan yang digunakan pada penelitian ini meliputi open mill, moving die rheometer (MDR 2000), hardness tester, tensometer (Loyd 2000R), pemotong dumbbell tipe 2, ozone aging tester, erlenmeyer, penjepit, timbangan, kertas saring dan oven
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