ISSN:
0268-2605
Keywords:
Polycarbosilane
;
metalation
;
hydrosilyation
;
ceramic
;
Nicalon
;
Chemistry
;
Industrial Chemistry and Chemical Engineering
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Notes:
Reaction of the Nicalon polycarbosilane with the n-BuLi/Me3COK reagent resulted in metalation of approximately one CH2 group in four. Reaction of the metalated polymer with Me2 (CH2 = CH)SiCl gave a Me2(CH2 = CH)Si-substitued Nicalon polycarbosilane. The polymer was heated with different amounts of the [(MeSiH)∼0.8(MeSi)∼0.2]n polysilane in the presence of azobisisobutyronitrile in refluxing benezene. Hydrosilylation by the Si—H-containing polysilane of the CH2=CH groups of the Me2(CH2=CH) Si-substituted Nicalon polycarbosilane gave a new hybrid polymer (when appropriate quantities of reactant polymers were used) whose pyrolyis in a stream of argon to 1000°C left a ceramic residue in 77% yield whose elemental analysis indicated a nominal composition of 91% by weight SiC and 9% C.
Additional Material:
1 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/aoc.590050603
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