Authors : Fatin Fadhel Mahmood, Huda Bukheet Hassan and Najlaa Mohammed Hadi
Abstract: In this study, Iraqi bentonite Kara Tepe was used as reinforcing phase in Polystyrene (PS) matrix to form composites films. Bentonite clay was prepared as a powder for particles size <35 m and <65 μm, followed by calcinations process at 450�C for 2 h. PVA solution used as a coated layer covered the bentonite applied as a filler. The optical study showed good transmittance value of PS in the VIS and NIR regions but it decrease with increasing particles size of reinforced bentonite in polystyrene/bentonite composite films. The values of allowed and forbidden indirect transition optical energy gap decrease with increasing particles size of reinforced bentonite up to (2.6, 2, 1.8) and (2, 1.4, 1.27 eV), respectively which it is possible to apply in transistor, capacitors, solar cells, etc. Optical constants such as refractive index, extinction coefficient, real and imaginary part of dielectric constant of polystyrene/reinforcement bentonite composite films were done.
Fatin Fadhel Mahmood, Huda Bukheet Hassan and Najlaa Mohammed Hadi, 2018. Effect of the Iraqi Bentonite Kara Tepe Filler on Optical Properties of Composites Based on Polystyrene. Journal of Engineering and Applied Sciences, 13: 10523-10527.