Synthesis, characterization, and properties of silylene-acetylene preceramic polymers
文献类型：期刊论文
| 作者 | Ye, Li1,2; Han, Weijian1,2; Zhang, Ruilin1; Hu, Jidong1; Zhao, Tong1 |
| 刊名 | Journal of applied polymer science
 |
| 出版日期 | 2008-12-15 |
| 卷号 | 110期号:6页码:4064-4070 |
| 关键词 | Silylene-acetylene polymers Preceramic Thermosets Pyrolysis Thermal properties |
| ISSN号 | 0021-8995 |
| DOI | 10.1002/app.28996 |
| 通讯作者 | Hu, jidong(hujidong@iccas.ac.cn) |
| 英文摘要 | A 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 |
| WOS关键词 | STOICHIOMETRIC SIC CERAMICS ; ORGANOSILICON POLYMERS ; CONDUCTING PROPERTIES ; THERMAL-PROPERTIES ; SILICON-CARBIDE ; PRECURSORS ; POLYMERIZATION ; PYROLYSIS ; POLY<(SILANYLENE)DIETHYNYLENE>S ; CHEMISTRY |
| WOS研究方向 | Polymer Science |
| WOS类目 | Polymer Science |
| 语种 | 英语 |
| WOS记录号 | WOS:000260587000095 |
| 出版者 | JOHN WILEY & SONS INC |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2390048 |
| 专题 | 中国科学院大学 |
| 通讯作者 | Hu, Jidong |
| 作者单位 | 1.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 |
| 推荐引用方式 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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来源：中国科学院大学
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