ICCAS OpenIR
Synthesis, Characterization, and Properties of Silylene-Acetylene Preceramic Polymers
Ye, Li1,2; Han, Weijian1,2; Zhang, Ruilin1; Hu, Jidong1; Zhao, Tong1
2008-12-15
Source PublicationJOURNAL OF APPLIED POLYMER SCIENCE
ISSN0021-8995
Volume110Issue:6Pages:4064-4070
AbstractA series of silylene-acetylene preceramic polymers 3a-e were synthesized by polycondensation reaction of dilithioacetylene with dichlorosilane (H2Si2Cl2) or/and methyldichlorosilane (MeSiHCl2). Their structures were confirmed by infrared spectra (IR), and H-1 and Si-29 NMR spectroscopies. Differential scanning calorimetry (DSC) diagrams show exotherms centered at 200 to 233 degrees C temperature range, attributed to crosslinking reaction of the acetylene and Si-H groups. After thermal treatment, the obtained thermosets 4a-e possess excellent thermal stability. Thermogravimetric analysis (TGA) under nitrogen show the T(d5)s (temperature of 5% weight loss) for all the thermosets are above 600 degrees C, and the overall char yields are between 95.62% and 89.67% at 900 degrees C. After pyrolysis at 1200 degrees C, the obtained ceramic residues 5a-e exhibit good thermo-oxidative stability with final weight retention between 98.76% and 91.66% at 900 degrees C under air. In particular, perhydroploy(silylene)ethynylene 3a, which has the highest Si/C ratio in silylene-acetylene polymers, has the highest char yield, and the derived ceramic material 5a displays the best thermo-oxidative stability. Based on Scanning electron microscopy and its associated energy-dispersive X-ray microanalysis (SEM EDX) and C-13 magic angle spinning nuclear magnetic resonance (MAS NMR) analysis, ceramic 5a contains the highest SiC content. (C) 2008 Wiley Periodicals, Inc. J Appl Polym Sci 110: 4064-4070, 2008
KeywordSilylene-acetylene Polymers Preceramic Thermosets Pyrolysis Thermal Properties
DOI10.1002/app.28996
Indexed BySCI
Language英语
WOS IDWOS:000260587000095
PublisherJOHN WILEY & SONS INC
Citation statistics
Cited Times:15[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.iccas.ac.cn/handle/121111/64908
Collection中国科学院化学研究所
Corresponding AuthorHu, Jidong
Affiliation1.Chinese Acad Sci, Ctr Mol Sci, Inst Chem, Lab Adv Polymer Mat, Beijing 100190, Peoples R China
2.Chinese Acad Sci, Grad Univ, Beijing 100190, Peoples R China
Recommended Citation
GB/T 7714
Ye, Li,Han, Weijian,Zhang, Ruilin,et al. Synthesis, Characterization, and Properties of Silylene-Acetylene Preceramic Polymers[J]. JOURNAL OF APPLIED POLYMER SCIENCE,2008,110(6):4064-4070.
APA Ye, Li,Han, Weijian,Zhang, Ruilin,Hu, Jidong,&Zhao, Tong.(2008).Synthesis, Characterization, and Properties of Silylene-Acetylene Preceramic Polymers.JOURNAL OF APPLIED POLYMER SCIENCE,110(6),4064-4070.
MLA Ye, Li,et al."Synthesis, Characterization, and Properties of Silylene-Acetylene Preceramic Polymers".JOURNAL OF APPLIED POLYMER SCIENCE 110.6(2008):4064-4070.
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