Synthesis of boron carbide via poly(vinylpentaborane) precursors
Limitations in traditional ceramic processing have encouraged interest in the development and utilization of polymer pyrolyses as low-temperature synthetic routes to nonoxide ceramic materials. Boron carbide is an example of a material where preparation from a polymer precursor might offer advantages over conventional synthetic techniques. Mixed B/sub 4/C-SiC ceramics have, in fact, been previously obtained from pyrolysis of poly(carboranesiloxane) polymers; however, a synthesis of pure B/sub 4/C from polymeric precursors has heretofore not been developed. They report here that 2-(H/sub 2/C=CH)-B/sub 5/H/sub 8/ will undergo thermal polymerization to vinylpentaborane oligomers and that these species can be converted to pure boron carbide (B/sub 4/C) in high ceramic yields under mild conditions.
- Research Organization:
- Univ. of Pennsylvania, Philadelphia (USA)
- OSTI ID:
- 7148689
- Journal Information:
- J. Am. Chem. Soc.; (United States), Journal Name: J. Am. Chem. Soc.; (United States) Vol. 110:10; ISSN JACSA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
400201* -- Chemical & Physicochemical Properties
BORON CARBIDES
BORON COMPOUNDS
CARBIDES
CARBON COMPOUNDS
CHEMICAL PREPARATION
CHEMICAL REACTION YIELD
CHEMICAL REACTIONS
DATA
EXPERIMENTAL DATA
INFORMATION
NUMERICAL DATA
ORGANIC BORON COMPOUNDS
ORGANIC COMPOUNDS
SYNTHESIS
YIELDS