Peroxide-substituted polysilazanes

Details Peroxide-substituted polysilazanes Peroxide-substituted polysilazanes

1994-08-30

1995-11-07

Marquis, Melvyn I.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

From silicon reactant having at least one...

528 25, 528 33, 528 38, 524443, 525474, C08G 7706

Patent

active

054649188

ABSTRACT:
An uncrosslinked polysilazane containing chemically bound peroxide groups is prepared by reacting a polysilazane and a hydroperoxide at a temperature below the decomposition temperature of the hydroperoxide. A thermoset polymer is formed by heating an uncrosslinked, peroxide-substituted silazane that is also substituted by alkenyl or alkynyl groups at temperatures sufficiently high to decompose the chemically bound peroxide groups to yield a free radical, thereby initiating crosslinking. The crosslinked polysilazanes can be pyrolyzed to form ceramic articles.

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patent: 5344907 (1994-09-01), Schwark
Kazakova, V. V. et al., Chemical Properties of Organooligocyclosilazanes, Poly. Sci. USSR, vol. 26, No. 8, pp. 1889-1897 (1984).

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