Thermal cure behavior and pyrolysis of methyl-tri(phenylethynyl)silane resin

✍ Scribed by Quan Zhou; Lizhong Ni

• Publisher: John Wiley and Sons
• Year: 2009
• Tongue: English
• Weight: 414 KB
• Volume: 113
• Category: Article
• ISSN: 0021-8995
• DOI: 10.1002/app.29542

✦ Synopsis

Abstract

A polyfunctional organic–inorganic hybrid monomer, methyl‐tri(phenylethynyl)silane (MTPES) could be thermally polymerized by a free radical mechanism to a highly crosslinked structure of interest as a high temperature composite matrix resin. The structural changes during thermal cure process were characterized by fourier transform infrared spectrum and ^13^C‐CP‐MAS‐NMR spectrum. The disappearance of secondary acetylene stretching band at 2166 cm^−1^ was used successfully to monitor cure reaction accompanied with the formation of cis‐polyene structure at 1600 and 754 cm^−1^. The possible cure mechanism of MTPES was also proposed. The pyrolysis of cured MTPES under a stream of argon to 1450°C gave a ceramic in high yield (81%). Thermal conversion of polymer to ceramic was studied by means of X‐ray diffraction, Raman spectrum, and energy dispersive spectrometer analysis. The results showed that pyrolytic products were made up of β‐SiC, graphite, and glassy carbon. © 2009 Wiley Periodicals, Inc. J Appl Polym Sci, 2009