Abstract
The thermal characteristics of a material are important to learn in order to know the thermal stability of the materials. Ethylene propylene diene monomer (EPDM) is a synthetic rubber that is widely used in industry due to its resistance to aging, ozone, and chemicals. The kinetic parameters and thermal decomposition of vulcanized EPDM were studied using thermogravimetric method with various vulcanization systems (efficient, semi-efficient, and conventional vulcanization system) and various carbon black (CB) as filler (50, 60, and 70 phr). Decomposition consist of two stages; the oxidation of EPDM and volatile matter loss then decomposition of EPDM. Kinetic parameters of the thermal decomposition were approximated by the Coats Redfern equation. Activation energy and decomposed mass increases with decreasing content of CB. Vulcanized EPDM with CB as filler has fairly good resistance against thermal decomposition. The decomposition process can be viewed in detail in this paper. Keywords: EPDM, thermal decomposition, kinetic, thermogravimetric, carbon black.
Highlights
Etilen propilen diena monomer (EPDM) adalah salah satu karet sintetis yang banyak digunakan dalam industri karena ketahanan terhadap aging, ozon, dan kimia yang baik
important to learn in order to know the thermal stability of the materials
a synthetic rubber that is widely used in industry
Summary
Vulkanisat EPDM dibuat dengan formulasi yang telah diuraikan pada publikasi sebelumnya (Mayasari & Yuniari, 2016) dengan bahan-bahan EPDM Keltan 4551 A (dengan kandungan ENB 8,7%), CB N220 (Ex.Korea), ZnO (Ex. Indoxide), asam stearat Aflux 42 M, TMQ (Ex. Kemai), paraffin wax Antilux 654 A, paraffinic oil, TMTD, MBT, sulfur (Ex. Miwon) dengan sistem vulkanisasi efisien, semi-efisien, dan konvensional. Formulasi yang digunakan ditampilkan pada Tabel 1. Peralatan Penelitian Penelitian ini menggunakan two roll mills skala laboratorium untuk komponding, mesin kempa hidrolik untuk vulkanisasi, reometer Gotech 3000A untuk mengetahui reologi kompon, dan Shimadzu DTG 60 untuk analisis termogravimetri.
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