Linear organodecaborane block copolymer as a single-source precursor for porous boron carbide ceramics

Wang, Jinlong; Gou, Yanzi; Zhang, Qiance; Ke, Jing; Chen, Zhou; Wang, Hao

doi:10.1016/j.jeurceramsoc.2016.12.035

Cited by 12 publications

(8 citation statements)

References 26 publications

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“…Our results demonstrated that the Grubbs-II catalyst could play a dual role in the ring-opening metathesis polymerization of alkenyldecaborane and subsequent hydroboration of decaborane with double bonds in the main polymer chain. These extra induced decaborane units not only increase the char yield, but also improved the crystallinity of polymer-derived ceramics, which is consistent with some previous research [ 11 , 14 ]. The synthesized polymer P(ND- co -D) has proven to be an excellent single-source precursor to boron-carbide ceramic materials such as nanopowders or thin films with high-ceramic-yield.…”

Section: Discussionsupporting

confidence: 91%

“…Chen et al [ 10 ] used an acrylamide-B 4 C system to produce hollow boron carbide microspheres. Wang et al [ 11 ] prepared porous boron carbide ceramics by a linear organodecaborane block copolymer. It can be seen that the polymer-derived ceramic (PDC) route [ 12 ] is one of the most significant and feasible methods to prepare B 4 C materials with complex structures.…”

Section: Introductionmentioning

confidence: 99%

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Synthesis and Ceramic Conversion of a New Organodecaborane Preceramic Polymer with High-Ceramic-Yield

Cao

Liu

et al. 2018

Molecules

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Boron carbide is one of the hardest materials known, with diamond-like mechanical properties and excellent chemical stability. It is wildly used in military defense area, nuclear industry, aerospace technology, etc. Precursor-derived ceramics have made it easier to produce pure boron carbide in processed forms and expand its applications. The challenge of this method is the synthesis of precursor polymer with high-ceramic-yield. The aim of the present work is to develop a new poly(6-norbornenyldecaborane-co-decaborane) [P(ND-co-D)] copolymer, which was successfully synthesized via ring-opening metathesis polymerization of 6-norbornenyldecaborane and tandem hydroboration with decaborane. The obtained light-yellow powder displayed good solubility, and was fully characterized by NMR, FT-IR and GPC analysis. Thermogravimetric analysis demonstrated that the char yield was up to 79%. The polymer-to-ceramic transformation process and pyrolysis mechanism has shown that the rearrangement of carbon chains of P(ND-co-D) mainly occurred in the temperature range of 350 °C~470 °C. Furthermore, the crystallization behavior and microstructures of derived ceramics were studied by XRD and SEM. Nano-sized boron carbide powders were prepared by pyrolysis of P(ND-co-D) under argon at 1400 °C for 2 h, while the structure and morphologies of the obtained rhombohedral B4C were investigated.

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Section: Discussionsupporting

confidence: 91%

Section: Introductionmentioning

confidence: 99%

Synthesis and Ceramic Conversion of a New Organodecaborane Preceramic Polymer with High-Ceramic-Yield

Cao

Liu

et al. 2018

Molecules

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“…Various boron-carbide-containing materials were prepared using various decaborane-based single-molecular precursors, such as [μ-6,6′-(CH 2 ) 6 -(B 10 H 13 ) 2 ] [ 79 , 80 ], [μ-6,6′-(1′,5′-cyclooctyl)-(B 10 H 13 ) 2 ] [ 81 ], [μ-6,6′-(2′,5′-norbornenyl)-(B 10 H 13 ) 2 ] [ 81 ], or polymers, including [-6-B 10 H 12 -Ph 2 POPPh 2 ] n - [ 82 ], [-6-B 10 H 12 -(CH 2 ) 6 ] n - [ 83 , 84 ], [-6-B 10 H 12 -(2′,5′-norbornenyl)] n - [ 81 , 83 , 84 , 85 , 86 , 87 , 88 , 89 ], [-6-B 10 H 12 -(1′,5′-cyclooctenyl)] n - [ 81 , 83 ], and [-6-B 10 H 12 -(1′,4′-cyclooctenyl)] n - [ 81 , 83 ].…”

Section: Decaborane As Boron Source For Boron-containing Materialsmentioning

confidence: 99%

Composites and Materials Prepared from Boron Cluster Anions and Carboranes

Avdeeva,

Nikiforova,

Malinina

et al. 2023

Materials

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Here, we present composites and materials that can be prepared starting with boron hydride cluster compounds (decaborane, decahydro-closo-decaborate and dodecahydro-closo-dodecaborate anions and carboranes). Recent examples of their utilization as boron protective coatings including using them to synthesize boron carbide, boron nitride, metal borides, metal-containing composites, and neutron shielding materials are discussed. The data are generalized demonstrate the versatile application of materials based on boron cluster anions and carboranes in various fields.

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“…In terms of side-chain carborane-containing polymers, controlled radical polymerization often leads to atactic polymers with a noncrystalline nature. − Coordination copolymerization of carborane-functionalized alkene with cyclooctene or ethylene could yield polyethylene-like polymers with bulky carborane as pendants. − More detailed synthetic strategies of carborane-containing polymers have been comprehensively reviewed in the latest work by Rendina and Müllner . We predict that the incorporation of carborane into the main chain of polyethylene could further enhance its thermal stability and mechanical properties by maintaining the intrinsic all-hydrocarbon backbone nature, as evidenced by the many decaborane or cyclic oxonium derivatives of polyhedral boron hydrides examples. − To the best of our knowledge, main-chain carborane-functionalized polyethylene has not been reported yet …”

Section: Introductionsmentioning

confidence: 98%

Main-Chain Carborane-Embedded Polyethylene

Zhang,

Meng,

et al. 2024

Macromolecules

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Functionalization of polyethylene toward high-performance polymers with good thermal and mechanical properties is a persistent challenge. Closo-carboranes, with a polyhedral nanocage structure, provide polyethylene with excellent thermal and chemical stability. In this work, main-chain carborane-embedded polyethylene is prepared by the ring-opening metathesis copolymerization of a cyclic o-carborane olefin with cyclooctene, followed by backbone hydrogenation. The main-chain carborane-embedded polyethylene mimics could offer superior thermal and mechanical properties to high-density polyethylene (HDPE) by adjusting the incorporation ratio while still maintaining moderate crystalline properties.

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Linear organodecaborane block copolymer as a single-source precursor for porous boron carbide ceramics

Cited by 12 publications

References 26 publications

Synthesis and Ceramic Conversion of a New Organodecaborane Preceramic Polymer with High-Ceramic-Yield

Synthesis and Ceramic Conversion of a New Organodecaborane Preceramic Polymer with High-Ceramic-Yield

Composites and Materials Prepared from Boron Cluster Anions and Carboranes

Main-Chain Carborane-Embedded Polyethylene

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