Polysilazane (original) (raw)
Un polysilazane est un polymère inorganique constitué d'une chaîne d'atomes alternativement de silicium et d'azote, de formule générique [–SiR1R2–NR3]n, dans laquelle R1, R2 et R3 peuvent représenter des atomes d'hydrogène ou des substituants organiques. Le H3Si–NH–SiH3, le H3Si–NH–SiH2–NH–SiH3 ou encore l'hexaméthyldisilazane (CH3)3Si–NH–Si(CH3)3 sont des exemples de polysilazanes simples.
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| dbo:abstract | Polysilazane sind polymere Verbindungen, in denen Silicium- und Stickstoffatome in alternierender Anordnung das chemische Grundgerüst bilden. Häufig ist dabei jedes Siliciumatom an zwei Stickstoffatome gebunden und jedes Stickstoffatom an zwei Siliciumatome, so dass sich bevorzugt molekulare Ketten und Ringe der Formel [R1R2Si–NR3]n bilden. R1-R3 können dabei Wasserstoffatome oder organische Reste sein. Sind nur H-Atome als Substituenten vorhanden, bezeichnet man das Polymer als Perhydropolysilazan ([H2Si–NH]n, auch Polyperhydridosilazan, anorganisches Polysilazan). Sind Kohlenwasserstoffreste am Silicium gebunden, spricht man von Organopolysilazanen. In ihrer molekularen Struktur sind die Polysilazane [R1R2Si–NH]n eng verwandt mit den Polysiloxanen [R1R2Si–O]n (Silikone), mit denen sie isoelektronisch sind. (de) Un polysilazane est un polymère inorganique constitué d'une chaîne d'atomes alternativement de silicium et d'azote, de formule générique [–SiR1R2–NR3]n, dans laquelle R1, R2 et R3 peuvent représenter des atomes d'hydrogène ou des substituants organiques. Le H3Si–NH–SiH3, le H3Si–NH–SiH2–NH–SiH3 ou encore l'hexaméthyldisilazane (CH3)3Si–NH–Si(CH3)3 sont des exemples de polysilazanes simples. (fr) Polysilazanes are polymers in which silicon and nitrogen atoms alternate to form the basic backbone. Since each silicon atom is bound to two separate nitrogen atoms and each nitrogen atom to two silicon atoms, both chains and rings of the formula occur. can be hydrogen atoms or organic substituents. If all substituents R are H atoms, the polymer is designated as Perhydropolysilazane, Polyperhydridosilazane, or Inorganic Polysilazane ([H2Si–NH]n). If hydrocarbon substituents are bound to the silicon atoms, the polymers are designated as Organopolysilazanes. Molecularly, polysilazanes are isoelectronic with and close relatives to Polysiloxanes (silicones). (en) |
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| rdfs:comment | Un polysilazane est un polymère inorganique constitué d'une chaîne d'atomes alternativement de silicium et d'azote, de formule générique [–SiR1R2–NR3]n, dans laquelle R1, R2 et R3 peuvent représenter des atomes d'hydrogène ou des substituants organiques. Le H3Si–NH–SiH3, le H3Si–NH–SiH2–NH–SiH3 ou encore l'hexaméthyldisilazane (CH3)3Si–NH–Si(CH3)3 sont des exemples de polysilazanes simples. (fr) Polysilazanes are polymers in which silicon and nitrogen atoms alternate to form the basic backbone. Since each silicon atom is bound to two separate nitrogen atoms and each nitrogen atom to two silicon atoms, both chains and rings of the formula occur. can be hydrogen atoms or organic substituents. If all substituents R are H atoms, the polymer is designated as Perhydropolysilazane, Polyperhydridosilazane, or Inorganic Polysilazane ([H2Si–NH]n). If hydrocarbon substituents are bound to the silicon atoms, the polymers are designated as Organopolysilazanes. Molecularly, polysilazanes are isoelectronic with and close relatives to Polysiloxanes (silicones). (en) Polysilazane sind polymere Verbindungen, in denen Silicium- und Stickstoffatome in alternierender Anordnung das chemische Grundgerüst bilden. Häufig ist dabei jedes Siliciumatom an zwei Stickstoffatome gebunden und jedes Stickstoffatom an zwei Siliciumatome, so dass sich bevorzugt molekulare Ketten und Ringe der Formel [R1R2Si–NR3]n bilden. R1-R3 können dabei Wasserstoffatome oder organische Reste sein. Sind nur H-Atome als Substituenten vorhanden, bezeichnet man das Polymer als Perhydropolysilazan ([H2Si–NH]n, auch Polyperhydridosilazan, anorganisches Polysilazan). Sind Kohlenwasserstoffreste am Silicium gebunden, spricht man von Organopolysilazanen. In ihrer molekularen Struktur sind die Polysilazane [R1R2Si–NH]n eng verwandt mit den Polysiloxanen [R1R2Si–O]n (Silikone), mit denen sie is (de) |
| rdfs:label | Polysilazane (de) Polysilazane (fr) Polysilazane (en) |
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