Abstract

AbstractAs SMP‐10 and SMP‐877 are pyrolyzed, they undergo multiple thermal decomposition reactions that result in the formation of amorphous SiC and differing degrees of excess carbon. Differences in the initial composition of the two polycarbosilanes in the form of allylic group concentration and the presence of methyl pendant groups lead to differences in thermal decomposition of the polymers. These differences then affect the evolution of density of the two polymers in a way that dramatically affects their volume yield as a function of pyrolysis temperature.

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