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Title: High-temperature resistant polyborosilazanes with tailored structures
Authors: Wang, Bijie
Chen, Ke
Li, Tianhao
Sun, Xun
Liu, Ming
Yang, Lingwei
Hu, Matthew Xiao
Xu, Jian
He, Liu
Huang, Qing
Jiang, Linbin
Song, Yujie
Keywords: Engineering::Materials
Issue Date: 2021
Source: Wang, B., Chen, K., Li, T., Sun, X., Liu, M., Yang, L., Hu, M. X., Xu, J., He, L., Huang, Q., Jiang, L. & Song, Y. (2021). High-temperature resistant polyborosilazanes with tailored structures. Polymers, 13(3).
Journal: Polymers
Abstract: Boron-containing organosilicon polymers are widely used under harsh environments as preceramic polymers for advanced ceramics fabrication. However, harmful chemicals released during synthesis and the complex synthesis routes have limited their applications. To solve the problems, a two-component route was adopted to synthesize cross-linked boron-containing silicone polymer (CPBCS) via a solventless process. The boron content and CPBCSs' polymeric structures could be readily tuned through controlling the ratio of multifunctional boron hybrid silazane monomers (BSZ12) and poly[imino(methylsilylene)]. The CPBCSs showed high thermal stability and good mechanical properties. The CPBCS with Si-H/C=C ratio of 10:1 showed 75 wt% char yields at 1000 °C in argon, and the heat release capacity (HRC) and total heat release (THR) are determined to be 37.9 J/g K and 6.2 KJ/g, demonstrating high thermal stability and flame retardancy. The reduced modulus and hardness of CPBCS are 0.30 GPa and 2.32 GPa, respectively. The novel polysilazanes can be potentially used under harsh environments, such as high temperatures or fire hazards.
ISSN: 2073-4360
DOI: 10.3390/polym13030467
Rights: © 2021 The Authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:MSE Journal Articles

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