Preparation and properties of novel,flexible, lead‐free X‐ray‐shielding materials containing tungsten and bismuth(III) oxide |
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| Authors: | Hao Chai Xiaobin Tang Minxuan Ni Feida Chen Yun Zhang Da Chen Yunlong Qiu |
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| Affiliation: | 1. Department of Nuclear Science and Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing, China;2. Jiangsu Key Laboratory of Nuclear Energy Equipment Materials Engineering, Nanjing, China;3. ZhongXing Energy Equipment Company, Limited, Haimen Nantong, China |
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| Abstract: | Novel, flexible, lead‐free X‐ray‐shielding composites were prepared with a high‐functional methyl vinyl silicone rubber (VMQ) matrix with W and Bi2O3 as filler materials. To verify the advanced properties of the lead‐free material, composites with the same mass fraction of PbO were compared. With the X‐ray energy ranging from 48 to 185 keV, the W/Bi2O3/VMQ composites exhibited higher X‐ray‐shielding properties. As the filler volume fraction decreased, the tensile strength, elongation, tear strength, and flexibility of the W/Bi2O3/VMQ composites increased. The Shore hardness of the W/Bi2O3/VMQ composites had a maximum value of 46.6 HA and was still very flexible. With decreasing filler volume fraction, the water‐vapor transmission performances of the W/Bi2O3/VMQ composites increased, and the W/Bi2O3/VMQ composites also showed better water‐vapor permeability. The heat‐transfer properties of the W/Bi2O3/VMQ composites increased with increasing W content, and when the W content exceeded 70 wt %, the thermal conductivity of the W/Bi2O3/VMQ material was about 70.45% higher than that of the PbO/VMQ composite. © 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2016 , 133, 43012. |
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| Keywords: | composites mechanical properties properties and characterization thermal properties |
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