Authors : Lubna H. Dakhil and Fouad. Sh. Hashim
Abstract: Iraqi bentonite Kara Tepe was used as reinforcing phase in Poly Methyl Methacrylate PMMA matrix to form composites. Bentonite clay was prepared as a powder for particle size <25 and <45 μm, follow them calcinations process at 450°C for 2 h. PVA solution used as a coated layer covered the bentonite applied as a filler. The reinforced bentonite were added to PMMA solution in the rate of 1 and 2 wt.%.The transmittance value of PMMA inter V is and NIR region is equal to 80% but it decrease with increasing particles size of reinforced bentonite. The values of allowed and forbidden indirect transition optical energy gap decrease with increasing particles size of reinforced bentonite up to 3, 2.71, 2.45 and 2.6, 2.15, 1.8 eV and 3, 2.7, 2.4 and 2.6, 2.1, 1.7 eV, respectively. Refractive index, extinction coefficient of polymer reinforcement bentonite were done. The optical properties are influenced by the bentonite additives ratio and particles size.
Lubna H. Dakhil and Fouad. Sh. Hashim, 2018. Study the Effect of Adding Iraqi Bentonite Kara Tepe on Some Optical Properties of Poly (Methyl Methacrylate). Journal of Engineering and Applied Sciences, 13: 7527-7532.