Analysis of structural and functional groups on the magnetic composite rubber - Lanthanum Manganite modification

Abstract

The synthesis and characterization of composite rubber - lanthanum manganite modification have been performed. The composite was prepared by rubber elastomer thermoplastics, stearic acid, ZnO, n-cyclohexyl-2-benzothiazyl sulphenamide (CBS), sulfur, and magnetic powder of La0.8Ba0.2(Fe, Mn, Ti)O3. The raw material was mixed by open two-roll mixing for 32 min and then pressed at temperature of 140 °C for 30 min. The element analysis showed that the sample contained carbon, oxygen, sulfur, zinc, lathanum, barium, manganese, titanium and iron. The refinement results of x-ray diffraction pattern show that the sample issemicrystalline with the crystallinity of 46%. The sample consist of the matrix is amorphose phase and the filler is crystalline phase. The filler consist of two phases, namely ZnO and La0.8Ba0.2(Fe, Mn,Ti)O3 phases. The functional groups analysis show that the sulfur addition modified the polymer by forming crosslink (bridges) between individual polymer chains and bonding between magnetic filler and rubber matrix. We concluded that this study has been successfully made a composite of rubber - La0.8Ba0.2(Fe, Mn,Ti)O3 for microwave absorber sheet application.