TY - JOUR
T1 - Preparation, Characterization, and Pyrolysis of Polycarbosilane with High Ceramic Yield and High Viscosity
AU - Geng Su, Su
AU - Ban, Zifa
AU - Li, Yongming
AU - Li, Weijie
AU - Zhang, Zhongwei
N1 - Publisher Copyright:
© 2022, Pleiades Publishing, Ltd.
PY - 2022/10
Y1 - 2022/10
N2 - Abstract: Liquid polycarbosilane substituted by allyl groups was prepared by the Grignard coupling reaction and reductive reaction synthesis with SiCl1.25(OCH3)1.75CH2Cl, Cl2CHSiMeCl2 and CH2=CHCH2Cl as the starting materials. The resultant polycarbosilanes were characterized by gel permeation chromatography, Fourier transform infrared and NMR spectroscopy. Moreover, the thermal properties and processing performance of polycarbosilanes were investigated. The ceramic yield of polycarbosilanes was about 77% at 1000°C, indicating that the polycarbosilanes have great potential to be promising precursors to SiC. With the increase of Cl2CHSiMeCl2 in the system, the viscosity of polycarbosilanes and C : Si ratio of ceramics increased, but the ceramic yield of polycarbosilanes decreased. Combining with its economical preparation, polycarbosilanes showed high potential as an economical SiC ceramic precursor for the fabrication of SiC matrix, coating and adhesives.
AB - Abstract: Liquid polycarbosilane substituted by allyl groups was prepared by the Grignard coupling reaction and reductive reaction synthesis with SiCl1.25(OCH3)1.75CH2Cl, Cl2CHSiMeCl2 and CH2=CHCH2Cl as the starting materials. The resultant polycarbosilanes were characterized by gel permeation chromatography, Fourier transform infrared and NMR spectroscopy. Moreover, the thermal properties and processing performance of polycarbosilanes were investigated. The ceramic yield of polycarbosilanes was about 77% at 1000°C, indicating that the polycarbosilanes have great potential to be promising precursors to SiC. With the increase of Cl2CHSiMeCl2 in the system, the viscosity of polycarbosilanes and C : Si ratio of ceramics increased, but the ceramic yield of polycarbosilanes decreased. Combining with its economical preparation, polycarbosilanes showed high potential as an economical SiC ceramic precursor for the fabrication of SiC matrix, coating and adhesives.
UR - http://www.scopus.com/inward/record.url?scp=85140133939&partnerID=8YFLogxK
U2 - 10.1134/S1560090422700385
DO - 10.1134/S1560090422700385
M3 - Article
AN - SCOPUS:85140133939
SN - 1560-0904
VL - 64
SP - 598
EP - 605
JO - Polymer Science - Series B
JF - Polymer Science - Series B
IS - 5
ER -