Electronic Theses and Dissertation

Komposit polyester timbal sebagai alternatif pengganti kaca timbal untuk aplikasi perisai radiasi telah diteliti. Penelitian ini bertujuan untuk mengetahui pengaruh konsentrasi timbal asetat dan ketebalan terhadap densitas, koefisien atenuasi sinar X, dan transmitansi cahaya komposit polyester timbal. Pada penelitian ini, komposit polyester timbal disintesa dari resin polyester sebagai matrik dan timbal asetat (Pb(CH3COO)2) sebagai pengisi. Konsentrasi Pb asetat divariasikan dari 0 %wt, 5%wt, 9%wt, 12%wt, 15%wt dan 18 %wt, sedangkan ketebalan sampel divariasikan dari 0,5cm, 0,75cm, 1cm, 1,25cm dan 1,5cm. Komposit polyester timbal dibuat menggunakan metode blending. Karakteristik sampel yang diuji meliputi densitas dan koefisien atenuasi sinar X menggunakan mesin sinar X merk GE pada tegangan 60 kV dan arus 125 mA, dengan detektor multimeter X ray. Disamping itu, pengujian transmitansi cahaya juga dilakukan, menggunakan ASD spektroradiometer pada rentang panjang gelombang 350 – 2500 nm. Hasil penelitian menunjukkan bahwa ketebalan sampel komposit Pb asetat tidak mempengaruhi nilai densitas dan koefisien atenuasi sinar X. Namun nilai transmitansi cahaya menurun seiring bertambahnya ketebalan sampel. Nilai densitas dan koefisien atenuasi sinar X dari komposit meningkat seiring dengan meningkatnya konsentrasi Pb asetat, akan tetapi nilai transmitansi cahaya mengalami penurunan.

Lead polyester composites as an alternative to lead glass for radiation shielding applications have been investigated. This study aims to determine the effect of lead acetate concentration and thickness on density, X-ray attenuation coefficient, and light transmittance of lead polyester composites. In this research, lead polyester composite was synthesized from polyester resin as matrix and lead acetate (Pb(CH3COO)2) as filler. The concentration of Pb acetate was varied from 0 %wt, 5%wt, 9%wt, 12%wt, 15%wt and 18 %wt, while the thickness of the sample was varied from 0,5cm, 0,75cm, 1cm, 1,25cm and 1,5cm. Lead polyester composites are made using a blending method. The characteristics of the samples tested include the density and coefficient of X-ray attenuation using a GE X-ray machine at a voltage of 60 kV and a current of 125 mA, with an X-ray multimeter detector. In addition, light transmittance testing was also carried out, using an ASD spectroradiometer in the wavelength range of 350 – 2500 nm. The results showed that the thickness of the Pb acetate composite sample did not affect the density and x ray attenuation coefficient values. However, the light transmittance value decreased with increasing sample thickness. The density value and X-ray attenuation coefficient of the composite increased with increasing Pb acetate concentration, but the light transmittance value decreased.