، صفحه 0-0 (1)

عنوان دوره: اولین دوره بین المللی و بیست و هشتمین دوره ملی (1400)

Materials containing boron element are effective in thermal neutron absorption and flexible composite of silicone rubber and B4C is an interesting candidate material for neutron shielding material. However, regarding to the lack of gamma ray attenuation effects reported about this material, the fabrication of different thickness sheets of polydimethylsiloxane/B4C composite with different boron carbide contents was done via physical mixing method. In this study, B4C incorporated to polydimethylsiloxane rubber matrix via ball milling procedure and then was vulcanized to form homogeneously sheet. After that, its characterization tests were performed by means of FTIR and SEM analyses. Silicone rubber composited with B4C just shows a little gamma absorption capability. The dosimetry results and visual appearance of the prepared sheets show that the sheet contents 7% B4C and thickness of 10.5 mm is the best candidate for gamma ray attenuation among the different studied sheets in this research.

B4C؛ PDMS؛ Composite؛ Shielding effect