Delaminated zeolite-catalysed synthesis of high-molecular weight polycarbosilane as a low shrinkage SiC precursor
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- Title
- Delaminated zeolite-catalysed synthesis of high-molecular weight polycarbosilane as a low shrinkage SiC precursor
- Authors
- Nguyen, CT; Kim, DP; Hong, SB
- Date Issued
- 2008-01-15
- Publisher
- JOHN WILEY & SONS INC
- Abstract
- A polycarbosilane (PCS) with a higher number-average molecular weight (2710 vs. 1570), and hence with a higher ceramic yield (74 vs. 68%), compared to a commercial Nipusi type S PCS has been synthesized via the catalytic decomposition of polydimethylsilane at 400 degrees C using H-ITQ-2, a delaminated zeolite with a very high external surface area, as a solid acid. The silicon carbide film fabricated using this PCS was found to show a much lower level (16 vs. 39%) of shrinkage than the commercial PCS-derived film, together with better mechanical properties, suggesting the potential of its preceramic polymer to produce robust ceramic coatings. (c) 2007 Wiley Periodicals, Inc.
- Keywords
- delaminated zeolite; low shrinkage; polycarbosilane; polysilanes; SiC films; SILICON-CARBIDE FIBER; HIGH-TENSILE STRENGTH; CHEMICAL VAPOR-DEPOSITION; CONVERSION; POLYMERS; MCM-22
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/29509
- DOI
- 10.1002/POLA.22420
- ISSN
- 0887-624X
- Article Type
- Article
- Citation
- JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY, vol. 46, no. 2, page. 725 - 732, 2008-01-15
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