PEMBUATAN DAN KARAKTERISASI KOMPON KARET CAIR BERBASIS LATEKS PEKAT DAN ASAP CAIR TEMPURUNG KELAPA

Sutanto, Teja Dwi (2015) PEMBUATAN DAN KARAKTERISASI KOMPON KARET CAIR BERBASIS LATEKS PEKAT DAN ASAP CAIR TEMPURUNG KELAPA. Masters thesis, Universitas Gadjah Mada Yogyakarta.

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Abstract

The main objective of this research was to produce liquid rubber compound with best chemical physical properties from concentrated latex. Liquid rubber compound has been prepared by mixing various rubber additives, namely stearic acid and ZnO as activator, butyl hydroxytoluene and coconut shell liquid smoke as antioxidant, CaCO as filler, mercaptobenzothiazole disulphide and tetramethylthiuram disulphide as accelerators, KOH as a stabilizer and sulfur as vulkanisator, with concentrated latex at room temperature. In this research, the concentration variation of KOH, coconut shell liquid smoke, ZnO and vulcanization time were conducted. The chemical physical properties tests of liquid rubber compound include resistance of heating, acids, alkalines, solvents, tear, development in solvents, modulus 300%, viscosity and acidity (pH). FTIR, SEM and thermal tests performed on the selected conditions, namely when liquid rubber compound showed the best and worst of physical and chemical properties. The results of this research showed that the liquid rubber compound formula with the best chemical physical properties were as follows: 166.7 g of concentrated latex; 7.0 g of KOH; 4.0 g of stearic acid; 9.0 g of ZnO; 2.0 g of butyl hydroxytoluene; 2.5 g of liquid smoke; 8.3 g of CaCO ; 2.5 g of mercaptobenzothiazole disulphide; 0.6 g of tetramethylthiuram disulfide and 3.0 g of sulfur with 60 minutes vulcanization time. With such formula can be obtained liquid rubber compound with superior chemical physical properties that are have high flexibility, not easy to break and tear as well as having high resistance to heat, acids, alkalines and solvents.

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