TY - JOUR
T1 - 液态超支化聚碳硅烷的热重分析及固化行为研究
AU - Zhao, Xiaoran
AU - Ji, Tiezheng
AU - Niu, Shuai
AU - Ma, Xutao
AU - Wang, Wentao
AU - Feng, Xiping
AU - Hou, Xiao
AU - Ma, Xiaoyan
N1 - Publisher Copyright:
© 2022, Editorial Dept. of JSRT. All right reserved.
PY - 2022/6
Y1 - 2022/6
N2 - The characteristics of ceramic precursors should be investigated completely to find ceramicizable coatings for fiber cladding requirements. The thermogravimetric, crosslinking and structural differences of three liquid hyperbranched polycarbosilanes were studied by synchronous thermal analysis (STA), non-isothermal differential scanning calorimetry (DSC), infrared(IR) and nuclear magnetic resonance carbon spectrum(13C-NMR).Drawing on the research method of resin curing behavior, the curing kinetic parameters of the three precursors were obtained by Kissinger, Ozawa and Crane equations, and the curing reaction kinetic equation of the system was determined. The results show that the weight loss of liquid hyperbranched polycarbosilane mainly occurs at 200~700 ℃, the organic functional groups in the precursor decrease gradually, and the inorganic transformation completes basically. The cross-linking curing of the precursor is mainly achieved by self-polymerization of double bonds, and the ceramic yield of the sample after cross-linking is improved. The structural differences among the precursors are verified by the presence of vinyl and allyl structure.
AB - The characteristics of ceramic precursors should be investigated completely to find ceramicizable coatings for fiber cladding requirements. The thermogravimetric, crosslinking and structural differences of three liquid hyperbranched polycarbosilanes were studied by synchronous thermal analysis (STA), non-isothermal differential scanning calorimetry (DSC), infrared(IR) and nuclear magnetic resonance carbon spectrum(13C-NMR).Drawing on the research method of resin curing behavior, the curing kinetic parameters of the three precursors were obtained by Kissinger, Ozawa and Crane equations, and the curing reaction kinetic equation of the system was determined. The results show that the weight loss of liquid hyperbranched polycarbosilane mainly occurs at 200~700 ℃, the organic functional groups in the precursor decrease gradually, and the inorganic transformation completes basically. The cross-linking curing of the precursor is mainly achieved by self-polymerization of double bonds, and the ceramic yield of the sample after cross-linking is improved. The structural differences among the precursors are verified by the presence of vinyl and allyl structure.
KW - Curing behavior
KW - Liquid hyperbranched polycarbosilane
KW - Reaction kinetics
KW - Thermogravimetric analysis
UR - https://www.scopus.com/pages/publications/85133646262
U2 - 10.7673/j.issn.1006-2793.2022.03.017
DO - 10.7673/j.issn.1006-2793.2022.03.017
M3 - 文章
AN - SCOPUS:85133646262
SN - 1006-2793
VL - 45
SP - 446
EP - 452
JO - Guti Huojian Jishu/Journal of Solid Rocket Technology
JF - Guti Huojian Jishu/Journal of Solid Rocket Technology
IS - 3
ER -