Abstract

Marlina¹, Saiful¹, Rahmi¹, Sitti Saleha¹ and Salfauqi Nurman²

DOI : http://dx.doi.org/10.13005/ojc/330122

New polyurethane membrane from hydroxylated rubber seed oil has been preparedin this study. Hydroxylated process of rubber seed oil improved 135.30%  of hydroxyl number and decreased 73.91% of iodine number of rubber seed oil. Optimum polyurethane membrane was obtained at the composition of hydroxylated rubber seed oil:hexamethylene-1,6-diisocyanate was 5:7 v/w. The membrane was homogeneous, dry, smooth, slightly stiff and brownish yellow. The flux and rejection factor of the membrane were  0,544L / m².h.bar and 98.86%, respectively. FTIR spectra indicated the formation of urethane bond (N-H at 3308 cm^-1). Thermal analysis showed two stages of decomposition at 223^oC and 386^oC. The membrane exhibited a strong and elastic properties with a tensile strength of 1.13 kgf/mm2 and elongation 215.36%.

Rubber seed oil; Hexamethylene-1,6-diisocyanate; Synthesis; Polyurethane membrane; Characterization

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