Soluble and Meltable Hyperbranched Polyborosilazanes toward High-Temperature Stable SiBCN Ceramics
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- 16 March 2015
- journal article
- research article
- Published by American Chemical Society (ACS) in ACS Applied Materials & Interfaces
- Vol. 7 (12), 6733-6744
- https://doi.org/10.1021/am509129a
Abstract
High-temperature stable siliconborocarbonitride (SiBCN) ceramics produced from single-source preceramic polymers have received increased attention in the last two decades. In this contribution, soluble and meltable polyborosilazanes with hyperbranched topology (hb-PBSZ) were synthesized via a convenient solvent-free, catalyst-free and one-pot A2 + B6 strategy, an aminolysis reaction of the A2 monomer of dichloromethylsilane and the B6 monomer of tris(dichloromethylsilylethyl)borane in the presence of hexamethyldisilazane. The amine transition reaction between the intermediates of dichlorotetramethyldisilazane and tri(trimethylsilylmethylchlorosilylethyl)borane led to the formation of dendritic units of aminedialkylborons rather than trialkylborons. The cross-linked hb-PBSZ precursors exhibited a ceramic yield higher 80%. The resultant SiBCN ceramics with a boron atomic composition of 6.0–8.5% and a representative formula of Si1B0.19C1.21N0.39O0.08 showed high-temperature stability and retained their amorphous structure up to 1600 °C. These hyperbranched polyborosilazanes with soluble and meltable characteristics provide a new perspective for the design of preceramic polymers possessing advantages for high-temperature stable polymer-derived ceramics with complex structures/shapes.Keywords
Funding Information
- Program for New Century Excellent Talents in University (NCET-11-0817)
- National Natural Science Foundation of China (20874080, 21174112, 51372202)
This publication has 65 references indexed in Scilit:
- Silicon–boron–carbon–nitrogen monoliths with high, interconnected and hierarchical porosityJournal of Materials Chemistry A, 2013
- Magnetoceramic nanocrystals from the bulk pyrolysis of novel hyperbranched polyferrocenyl(boro)carbosilanesJournal of Materials Chemistry C, 2012
- Novel Hyperbranched Ferrocene-Containing Poly(boro)carbosilanes Synthesized via a Convenient “A2+ B3” ApproachMacromolecules, 2011
- Tuning of the Rheological Properties and Thermal Behavior of Boron-Containing PolysiloxanesChemistry of Materials, 2008
- A new controllable approach to synthesize hyperbranched poly(siloxysilanes)Journal of Polymer Science Part A: Polymer Chemistry, 2008
- Synthesis, characterization, and UV curing kinetics of hyperbranched polycarbosilaneJournal of Applied Polymer Science, 2007
- Silicon carbonitride from polymeric precursors: thermal cross-linking and pyrolysis of oligosilazane model compoundsChemistry of Materials, 1992
- Chemical and structural order in silicon oxynitrides by methods of surface physicsProgress in Surface Science, 1990
- A Liquid Silazane Precursor To Silicon NitrideJournal of the American Ceramic Society, 1983
- Molecular Size Distribution in Three Dimensional Polymers. VI. Branched Polymers Containing A—R—Bf-1 Type UnitsJournal of the American Chemical Society, 1952