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Digitale Medien

Synthesis and thermal studies of heterocyclic siloxanes containing boron (1994)

Behbehani, Haider S. J. ; Brisdon, Brian J. ; McEnaney, Brian

New York, NY : Wiley-Blackwell

Polymers for Advanced Technologies 5 (1994), S. 653-655

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ISSN: 1042-7147

Schlagwort(e): Cycloborosiloxanes ; Preceramic polymers ; Silicon carbide ; Chemistry ; Polymer and Materials Science

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Chemie und Pharmazie , Maschinenbau

Notizen: Eight- and six-membered cycloborasiloxanes containing two and one boron atoms respectively are strained ring compounds which undergo ring opening polymerization and ring-ring transformation reactions on thermolysis. Prolonged heating at 200°C results in volatilization of the cyclic boroxine (PhBO)3, whereas rapid heating of either compound to 1500°C in an inert atmosphere does not result in loss of boron, but affords instead an amorphous residue containing silicon carbide, boron oxide and carbon. Upon further pyrolysis at 1700°C the final product consists of microcrystalline silicon carbide in which are embedded large crystals of boron carbide.

Zusätzliches Material: 1 Ill.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/pat.1994.220051004

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