Pengaruh mimosa pada penyamakan kulit jaket domba samak nabati menggunakan sistem C-RFP, ditinjau dari sifat organoleptis, fisis, dan morfologi kulit The effect of mimosa in the tanning of vegetable-tanned sheep leather for jackets using C-RFP system on the organoleptic, physical, and morphology properties of leather
The NBR/EPDM blend has great ozone, oil, and heat resistance. Carbon black is the most common used filler material for rubber goods. But, it is less environmentally friendly and less healthy friendly. In this study, it would be studied the use of natural zeolite as a substitute for the filler. This blend was carried out by a two-roll mill and tested by rheometer and tensile strength tester. From the research that has been done, it was known that vulcanizate with carbon black was better than all of the vulcanizate using zeolite as filler substitute. Vulcanizate with CB provided the fastest curing time, the fastest reaction speed and also the best mechanical properties. Vulcanization with the 10 phr zeolite gives the optimum curing time and the best mechanical properties compared to the substitution of other fillers. This shows that 10 phr zeolite (16.7%) can be a suitable filling material for NBR/ EPDM blend.
Pencampuran dua karet atau lebih dapat menghasilkan sifat produk yang unggul. Penelitian ini mempelajari tentang kemampuan proses dan karakteristik pematangan dari campuran NBR/EPDM. Pada penelitian ini digunakan beberapa jenis kompatibiliser, yaitu metil-metakrilat-butadiene-stirene (MBS), montmorillonite, dan silika. Kompatibiliser digunakan untuk mendapatkan kompon yang homogen. Kompon NBR/EPDM dibuat dengan menggunakan two-roll mill. Viskositas mooney, reologi, dan kinetika pematangan dipelajari dengan menggunakan mooney viscometer dan rheometer. Dari penelitian yang telah dilakukan, diketahui bahwa campuran NBR/EPDM menghasilkan kompon dengan kemampuan proses, waktu pematangan, serta indeks kecepatan reaksi yang lebih baik dari kompon NBR dan kompon EPDM secara terpisah. Montmorillonite sebagai kompatibiliser menghasilkan kompon yang memiliki kemampuan proses serta memberikan indeks kecepatan reaksi yang lebih baik dibandingkan dengan MBS dan silika. Montmorillonite dapat menjadi kompatibiliser yang sesuai untuk campuran NBR/EPDM.
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