Modification of a liquid polycarbosilane with 9-BBN as a high-ceramic-yield precursor for SiC

Zhaoju Yu; Muhe Huang; Yunhui Fang; Ran Li; Junying Zhan; Birong Zeng; Guomei He; Haiping Xia; Litong Zhang

doi:10.1016/j.reactfunctpolym.2010.02.007

Modification of a liquid polycarbosilane with 9-BBN as a high-ceramic-yield precursor for SiC

Zhaoju Yu, Muhe Huang, Yunhui Fang, Ran Li, Junying Zhan, Birong Zeng, Guomei He, Haiping Xia, Litong Zhang

Xiamen University

科研成果: 期刊稿件 › 文章 › 同行评审

26 引用（Scopus）

摘要

Allyhydridopolycarbosilane (AHPCS) was partially modified with 9-borabicyclo-[3.3.1] nonane (9-BBN) via conventional hydroboration. The as-synthesized boron-modified AHPCS (B-AHPCS) was characterized by gel-permeation chromatography, Fourier transformed infrared spectroscopy (FTIR), and nuclear magnetic resonance spectroscopy. The results indicated that hydroboration did occur via the consumption of C{double bond, long}C groups. In comparison with the parent AHPCS, the B-AHPCS retained the hyperbranched structure as expected. The thermal properties of B-AHPCS were investigated by thermal gravimetric analysis. The ceramic yield of B-AHPCS reached 75% at 1000 °C, 15% higher than that of the parent AHPCS. The structural evolution of the B-AHPCS during heat treatment was characterized by FTIR. At high temperatures, the introduction of <1 wt.% boron significantly inhibited SiC crystallization. The 1800 °C ceramics derived from B-AHPCS were found to be significantly denser than that from AHPCS.

源语言	英语
页（从-至）	334-339
页数	6
期刊	Reactive and Functional Polymers
卷	70
期	6
DOI	https://doi.org/10.1016/j.reactfunctpolym.2010.02.007
出版状态	已出版 - 6月 2010
已对外发布	是

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title = "Modification of a liquid polycarbosilane with 9-BBN as a high-ceramic-yield precursor for SiC",

abstract = "Allyhydridopolycarbosilane (AHPCS) was partially modified with 9-borabicyclo-[3.3.1] nonane (9-BBN) via conventional hydroboration. The as-synthesized boron-modified AHPCS (B-AHPCS) was characterized by gel-permeation chromatography, Fourier transformed infrared spectroscopy (FTIR), and nuclear magnetic resonance spectroscopy. The results indicated that hydroboration did occur via the consumption of C{double bond, long}C groups. In comparison with the parent AHPCS, the B-AHPCS retained the hyperbranched structure as expected. The thermal properties of B-AHPCS were investigated by thermal gravimetric analysis. The ceramic yield of B-AHPCS reached 75% at 1000 °C, 15% higher than that of the parent AHPCS. The structural evolution of the B-AHPCS during heat treatment was characterized by FTIR. At high temperatures, the introduction of <1 wt.% boron significantly inhibited SiC crystallization. The 1800 °C ceramics derived from B-AHPCS were found to be significantly denser than that from AHPCS.",

keywords = "Boron, Hydroboration, Polycarbosilane, Precursor, Silicon carbide",

author = "Zhaoju Yu and Muhe Huang and Yunhui Fang and Ran Li and Junying Zhan and Birong Zeng and Guomei He and Haiping Xia and Litong Zhang",

year = "2010",

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AU - Yu, Zhaoju

AU - Huang, Muhe

AU - Fang, Yunhui

AU - Li, Ran

AU - Zhan, Junying

AU - Zeng, Birong

AU - He, Guomei

AU - Xia, Haiping

AU - Zhang, Litong

PY - 2010/6

Y1 - 2010/6

N2 - Allyhydridopolycarbosilane (AHPCS) was partially modified with 9-borabicyclo-[3.3.1] nonane (9-BBN) via conventional hydroboration. The as-synthesized boron-modified AHPCS (B-AHPCS) was characterized by gel-permeation chromatography, Fourier transformed infrared spectroscopy (FTIR), and nuclear magnetic resonance spectroscopy. The results indicated that hydroboration did occur via the consumption of C{double bond, long}C groups. In comparison with the parent AHPCS, the B-AHPCS retained the hyperbranched structure as expected. The thermal properties of B-AHPCS were investigated by thermal gravimetric analysis. The ceramic yield of B-AHPCS reached 75% at 1000 °C, 15% higher than that of the parent AHPCS. The structural evolution of the B-AHPCS during heat treatment was characterized by FTIR. At high temperatures, the introduction of <1 wt.% boron significantly inhibited SiC crystallization. The 1800 °C ceramics derived from B-AHPCS were found to be significantly denser than that from AHPCS.

AB - Allyhydridopolycarbosilane (AHPCS) was partially modified with 9-borabicyclo-[3.3.1] nonane (9-BBN) via conventional hydroboration. The as-synthesized boron-modified AHPCS (B-AHPCS) was characterized by gel-permeation chromatography, Fourier transformed infrared spectroscopy (FTIR), and nuclear magnetic resonance spectroscopy. The results indicated that hydroboration did occur via the consumption of C{double bond, long}C groups. In comparison with the parent AHPCS, the B-AHPCS retained the hyperbranched structure as expected. The thermal properties of B-AHPCS were investigated by thermal gravimetric analysis. The ceramic yield of B-AHPCS reached 75% at 1000 °C, 15% higher than that of the parent AHPCS. The structural evolution of the B-AHPCS during heat treatment was characterized by FTIR. At high temperatures, the introduction of <1 wt.% boron significantly inhibited SiC crystallization. The 1800 °C ceramics derived from B-AHPCS were found to be significantly denser than that from AHPCS.

KW - Boron

KW - Hydroboration

KW - Polycarbosilane

KW - Precursor

KW - Silicon carbide

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Modification of a liquid polycarbosilane with 9-BBN as a high-ceramic-yield precursor for SiC

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