New poly(carbosilane) models. 5. Pyrolysis of a series of functional poly(carbosilanes)

Journal Article · · Chemistry of Materials; (USA)

DOI:https://doi.org/10.1021/cm00014a029· OSTI ID:5492380

Bouillon, E; Pailler, R; Naslain, R ^[1]; Bacque, E; Pillot, J -P; Birot, M; Dunogues, J; Huong, P V ^[2]

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1. Labortoire des Composites Thermostructuraux, Pessac (France)
2. Universite Bordeaux-I, Talence (France)

Ten models of functional poly(carbosilane) (PCS) or poly(carbosilazane) (PCSZ) precursors, prepared from chlorinated poly((dimethylsilylene)methylene), were pyrolyzed, under inert gas flow or vacuum at temperatures up to 2,300{degree}C, to derive relations between the nature of the precursors and that of the ceramic residues. The organometallic/inorganic transition and the recrystallization of the pyrolytic residues were studied by different analytical techniques. Linear precursors resulted in low ceramic yields unless a cross-linking treatment was applied prior to pyrolysis. High C content precursors do not necessarily lead to high C content ceramics. Ternary (Si-C-O or Si-C-N) and even quaternary tetrahedral species were present in the ceramic residues. Nitrogen was found to inhibit the crystallization of the ex-PCSZ ceramics up to {approximately}1,400{degree}C. Only part of the initial skeleton of the precursors was maintained in the ceramics.

• OSTI ID: 5492380
• Journal Information: Chemistry of Materials; (USA), Journal Name: Chemistry of Materials; (USA) Vol. 3:2; ISSN CMATE; ISSN 0897-4756
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360201* -- Ceramics
Cermets
& Refractories-- Preparation & Fabrication
CERAMICS
CHEMICAL ANALYSIS
CHEMICAL REACTIONS
COHERENT SCATTERING
DATA ANALYSIS
DECOMPOSITION
DIFFRACTION
ELECTRON SPECTROSCOPY
GRAVIMETRIC ANALYSIS
HYDRIDES
HYDROGEN COMPOUNDS
LASER SPECTROSCOPY
ORGANIC COMPOUNDS
ORGANIC SILICON COMPOUNDS
PYROLYSIS
QUANTITATIVE CHEMICAL ANALYSIS
RAMAN SPECTROSCOPY
SCATTERING
SILANES
SILICON COMPOUNDS
SPECTROSCOPY
SYNTHESIS
THERMAL ANALYSIS
THERMAL GRAVIMETRIC ANALYSIS
THERMOCHEMICAL PROCESSES
VERY HIGH TEMPERATURE
X-RAY DIFFRACTION