Synthesis and characterization of novel preceramic polymer for SiC

Abstract

Polyphenylcarbosilane as a novel preceramic polymer for SiC was synthesized from thermal

Synthesis and optical properties of σ–π conjugated aluminum-containing polyphenylcarbosilane (Al-PPCS) by hydrosilylation polymerization

“…Al-PCS and styrene were used as reactants, and chloroplatinic acid was used as catalyst. The product named aluminum-containing polyphenylcarbosilane (Al-PPCS) can be widely used as a novel preceramic polymer precursor which has carbon rich property due to its phenyl group [32][33][34]. Introduction of aryl groups into Al-PCS leads to H consumption through which aryl is closely bonded to Si by breaking SiÀ ÀH to form SiÀ ÀCH 2 À ÀCH 2 À Àphenyl bonds in Al-PPCS.…”

Palladium(II) supported on polycarbosilane: Application as reusable catalyst for Heck reaction

“…It is not hard to envision a variety of potential applications that are opening up for these polymers in areas such as nanotechnology [1], surface science, catalysis [2][3][4][5][6], liquid crystals [7][8][9], new ceramic materials [10][11][12][13][14], organic-inorganic hybrids etc. PCS, which contains both Si and C in their back bone structure, have been of particular importance as precursor to SiC [15][16][17][18][19][20][21].…”

“…PCS can be prepared in one step from simple silane monomers or mixtures containing vinyl, halo or halomethyl moieties in the presence of an active metal. Several investigators have explored the use of alkali metals for the reductive coupling of silanes and vinyl silanes [11][12][13][14]16,[18][19][20][21]. The participation of vinyl groups produces partial branching.…”

Preceramic polymer as precursor for near‐stoichiometric silicon carbon with high ceramic yield

“…The average molecular weight ( M w ) of the polyphenylcarbosilane synthesized was 2500, and it was found to easily dissolve in an organic solvent. The ceramic yield calculated from thermogravimetric analysis (TGA) is approximately 60% at 1000°C . Thermosetting polycarbosilane (PVCS) was prepared from PCS and 2,4,6, 8‐tetravinyl‐2,4,6,8‐tetramethylcyclotrasiloxane.…”