PENGARUH PENAMBAHAN FILLER NA-BENTONIT/CARBON BLACK TERHADAP SIFAT MEKANIK DAN MORFOLOGI LATEKS

Muliani, (2013) PENGARUH PENAMBAHAN FILLER NA-BENTONIT/CARBON BLACK TERHADAP SIFAT MEKANIK DAN MORFOLOGI LATEKS. Undergraduate thesis, UNIMED.

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Abstract

Bentonit merupakan salah satu jenis lempung yang banyak mengandung senyawa alumina silikat. Bentonit yang mudah mengembang adalah bentonit natrium (Na-bentonit). Diperkirakan bahan ini berpotensi digunakan sebagai filler untuk meningkatkan sifat karet berbasis karet alam karena banyak mengandung unsur silika. Tujuan Penelitian ini adalah untuk mengetahui sifat mekanik (Kekuatan tarik, perpanjangan putus, Modulus elastisitas, Kekerasan, Kuat sobek) serta sifat morfologi dari penambahan filler Na-bentonit/carbon black terhadap Lateks. Pembuatan Na-bentonit dilakukan dengan pencampuran NaCl jenuh di magnetic stirer selama 2 jam pada suhu 700C. Kedalam campuran tersebut ditambahkan aquades 500 ml. Campuran diaduk selama 10 menit. Lalu didiamkan hingga terjadi pengendapan, kemudian campuran disaring dan filtratnya . Sedimen yang diperoleh ditambahkan NaCl jenuh untuk kedua kalinya sebanyak 500 ml dan campuran diaduk kembali selama 2 jam pada suhu 700C. Sedimen yang diperoleh dipisahkan dari larutannya dengan cara disaring. Sedimen yang didapatkan dicuci dengan akuades panas. Sedimen yang didapatkan dikeringkan dalam oven pada temperatur 120oC selama 6 jam. Na-bentonit digunakan bersama dengan carbon black sebagai bahan pengisi pada campuran kompon karet dengan variasi komposisi filler (0,10,20,30) phr. Bahan dicampur dengan menggunakan open mill selama 6 menit. Hasil open mill divulkanisasi pada suhu 1700C. Selanjutnya dilakukan pengukuran kuat tarik, perpanjangan putus, modulus elastisitas denagan menggunakan alat tensiometer yang menagcu pada standar ASTM D 412, pengukuran kuat sobek menggunakan alat tensiometer berdasarkan acuan ASTM D 624-00. Hasil menunjukkan bahwa penambahan filler Na-bentonit/carbon blak berpengaruh terhadap sifat mekanik meliputi kekuatan tarik, perpanjangan putus, modulus elastisitas, kekerasan, kuat sobek. Hasil Morfologi memperlihatkan adanya rongga-rongga pada campuran kompon karet dan terjadinya algomerasi.

Item Type: Thesis (Undergraduate)
Contributors:
ContributionNameNIDN/NIDK
Thesis advisorSihombing, Eidi195706061985031002
Call Number: 530.12 Mul p
Keywords: Latek;Karet;Senti=rifugasi; Kompon;Bentonit;Montmorillonit;Pelunak;Molalitas;Mekanik
Subjects: L Education > LB Theory and practice of education > LB1025 Teaching (Principles and Practice)
Q Science > QC Physics
Divisions: Fakultas Matematika dan Ilmu Pengetahuan Alam > Fisika
Depositing User: Mrs Elita Sari Sitorus
Date Deposited: 08 Apr 2016 08:34
URI: http://digilib.unimed.ac.id/id/eprint/10655

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