Effect of pendant groups on the mass yield and density of polycarbosilanes during pyrolysis
Thomas S. Key, Garth B. Wilks, Michael K. Cinibulk
Abstract
Abstract As 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.
Topics & Concepts
PyrolysisThermal decompositionYield (engineering)PolymerDecompositionMaterials scienceChemical engineeringAmorphous solidCarbon fibersPolymer chemistryChemistryOrganic chemistryComposite materialComposite numberEngineeringAdvanced ceramic materials synthesisFiber-reinforced polymer compositesBoron and Carbon Nanomaterials Research