PENGARUH PAPARAN MICROWAVE TERHADAP DERAJAT IKATAN SILANG PADA VULKANISASI KARET STIRENA BUTADIENA

Andri Saputra; Atiqa Rahmawati; Uma Fadzilia Arifin; Mertza Fitra  Agustian

doi:10.22302/ppk.wp.v43i1.978

Authors

Andri Saputra Politeknik ATK Yogyakarta
Atiqa Rahmawati Politeknik ATK Yogyakarta
Uma Fadzilia Arifin Politeknik ATK Yogyakarta
Mertza Fitra Agustian Politeknik ATK Yogyakarta

DOI:

https://doi.org/10.22302/ppk.wp.v43i1.978

Keywords:

derajat ikatan silang, karet sitrena butadiena, microwave, vulkasinasi

Abstract

Vulkanisasi karet diperlukan untuk meningkatkan sifat kekuatan dan elastisitas suatu produk karet. Selain mempersingkat waktu proses, kelebihan vulkanisasi menggunakan radiasi elektromagnetik dari microwave adalah panas yang seragam yang tidak tergantung pada ketebalan produk. Penelitian ini bertujuan mengetahui karakteristik vulkanisasi karet stirena butadiena pada berbagai waktu paparan radiasi microwave. Kompon karet stirena butadiena dimasukkan dalam microwave dan diberi paparan radiasi elektromagnetik menggunakan daya 5 W pada berbagai waktu (10, 30, 50, 60, dan 70 menit). Derajat ikatan silang vulkanisat diuji menggunakan metode Flory-Rehner. Hasil penelitian diketahui bahwa tahap induksi vulkanisasi karet stirena butadiena pada daya 100 W membutuhkan durasi paparan yang lama sekitar 50 menit dengan derajat ikatan silang sebesar 0,52x10-8 mol/cm3. Tren hasil menunjukkan bahwa lama paparan radiasi berbanding lurus dengan nilai derajat ikatan silang karet stirena butadiene. Derajat ikatan silang karet stirena butadiene pada waktu 50, 60, dan 70 menit secara berurutan adalah 0,52x10-8 mol/cm3, 4,65x10-8 mol/cm3, dan 29,41x10-8 mol/cm3. Paparan radiasi elektromagnetik dari microwave di atas menit ke-70 diperkirakan masih dapat menyebabkan terbentuknya ikatan silang antar karet stirena butadiene hingga titik maksimum pada menit tertentu.

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