Novel linear metallocene polymers containing acetylenic and...

C - Chemistry – Metallurgy – 08 – G

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C08G 79/00 (2006.01) C04B 35/571 (2006.01) C08G 77/56 (2006.01) C08G 77/58 (2006.01) C08G 79/08 (2006.01) C08G 79/14 (2006.01) C08J 3/24 (2006.01)

Patent

CA 2283505

Thermally stable thermosets are formed from novel linear polymer containing acetylenic units and a random distribution of organotransition metal complexes, siloxane, boron, and/or carborane-siloxane units formed by crosslinking of the linear copolymers through the acetylene units in the polymer backbone. The thermosets can be used as structural components in high temperature and oxidizing environments or as pyrolytic precursors to metal containing ceramics, ceramic films and fibers having enhanced strength and toughness with superior mechanical, optical, electrical and/or magnetic properties.

Cette invention se rapporte à la fabrication de matières thermodurcies, thermiquement stables, à partir de nouveaux polymères linéaires contenant des motifs acétyléniques et une distribution aléatoire de complexes de métaux de transition organiques, de motifs de siloxane, de bore et/ou de carborane-siloxane, formés par réticulation des copolymères linéaires par l'intermédiaire des motifs acétyléniques du squelette linéaire du polymère. Ces matières thermodurcies peuvent servir de composants structuraux dans des environnements oxydants et à température élevée, ou de précurseurs pyrolytiques de céramiques contenant des métaux, de films céramiques et de fibres présentant une résistance et une ténacité améliorées ainsi que des caractéristiques mécaniques, optiques, électriques et/ou magnétiques supérieures.

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