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Preparation and properties of novel, flexible, lead‐free X‐ray‐shielding materials containing tungsten and bismuth(III) oxide
Author(s) -
Chai Hao,
Tang Xiaobin,
Ni Minxuan,
Chen Feida,
Zhang Yun,
Chen Da,
Qiu Yunlong
Publication year - 2016
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.43012
Subject(s) - materials science , composite material , shore durometer , ultimate tensile strength , volume fraction , mass fraction , composite number , silicone rubber , electromagnetic shielding , bismuth , metallurgy
Novel, flexible, lead‐free X‐ray‐shielding composites were prepared with a high‐functional methyl vinyl silicone rubber (VMQ) matrix with W and Bi 2 O 3 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/Bi 2 O 3 /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/Bi 2 O 3 /VMQ composites increased. The Shore hardness of the W/Bi 2 O 3 /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/Bi 2 O 3 /VMQ composites increased, and the W/Bi 2 O 3 /VMQ composites also showed better water‐vapor permeability. The heat‐transfer properties of the W/Bi 2 O 3 /VMQ composites increased with increasing W content, and when the W content exceeded 70 wt %, the thermal conductivity of the W/Bi 2 O 3 /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.