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Rheological and thermal behaviours of a hyperbranched polycarbosilane
Author(s) -
Piriou Cassandre,
Viers Lucas,
Lucas Romain,
Bouzat Fabien,
Laadoua Hatim,
Champavier Yves,
Foucaud Sylvie,
Coelho Cristina,
Babonneau Florence
Publication year - 2018
Publication title -
applied organometallic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.53
H-Index - 71
eISSN - 1099-0739
pISSN - 0268-2605
DOI - 10.1002/aoc.4443
Subject(s) - hydrosilylation , materials science , rheology , alkene , polymer chemistry , pyrolysis , fourier transform infrared spectroscopy , polymerization , polymer , kinetics , silicon carbide , infrared , chemical engineering , infrared spectroscopy , catalysis , composite material , organic chemistry , chemistry , physics , optics , quantum mechanics , engineering
A hyperbranched polymer, a precursor of silicon carbide (SiC), was successfully synthesized using a hydrosilylation reaction with Karstedt's catalyst. This reaction was optimized with the use of a rheometer coupled with an infrared spectrometer. The polymeric precursor was characterized using NMR and Fourier transform infrared spectroscopies, and dynamic rheology. The polymerization reaction was followed in situ by combined rheological and infrared measurements, indicating a gel‐like behaviour for alkene conversions higher than 0.55. Overall second‐order kinetics was determined for the hydrosilylation reaction. Pyrolysis at 1400 °C led to porous materials with β‐SiC and free carbon.