Synthesis and thermal degradation mechanism of polyorganocarboranesiloxanes containing m-carboranylmethyl unit
文献类型：期刊论文
| 作者 | Lou, Pingping1,2; Zhang, Xuezhong1; Liu, Bozheng1,2; Gao, Xiyin1; Zhang, Zhijie1; Xie, Zemin1 |
| 刊名 | POLYMER DEGRADATION AND STABILITY
 |
| 出版日期 | 2017-10-01 |
| 卷号 | 144页码:304-314 |
| 关键词 | Carborane Thermal Properties Polyorganocarboranesiloxane Thermal Degradation Mechanism Xps Elastomer |
| 英文摘要 | This paper reports a high-yielding, efficient and facile method in preparing monomers, namely 1,7bis(hydroxyl(dimethyl)silylmethyl)-m-carborane (M1), 1,7-bis(diethylamino(dimethyl)silylmethyl)-mcarborane (M2), 1,3-dimethy1-1,3-diphenyl-siloxanediol (M3) and diethylaminomethylphenylsilane (M4). The reaction of M2 and M3 to get polymer P1, and the reaction of M1 and M4 to get polymer P2 which has a promising lead in searching for materials with high-temperature properties. The structure of monomers and linear polymers were characterized by NMR and FTIR. Thermal properties of the poly-organocarboranesiloxane elastomers were characterized by DSC and TGA.. The results showed that elastomers E1 and E2 have better thermal stability and thermal oxidative stability with 5% weight loss temperatures above 570 degrees C, 650 degrees C in nitrogen and 536 degrees C, 730 degrees C in air, respectively than that of linear polymers P1 and P2. The highlight was to study the thermal degradation mechanism of poly-organocarboranesiloxane elastomers using XPS and Solid-state Si-29 NMR. Carborane and organosiloxane outside of samples were gradually oxidized to B2O3 and SiO2 respectively, the inside only occurred the cleavage of the Si-Ph bond caused by terminal hydroxyl groups which resulted in chain branching and illustrated there was no access for oxygen easy to internal oxidation. (C) 2017 Published by Elsevier Ltd. |
| 语种 | 英语 |
| 源URL | [http://ir.iccas.ac.cn/handle/121111/39167]  |
| 专题 | 化学研究所_高技术材料实验室 |
| 作者单位 | 1.Chinese Acad Sci, Inst Chem, Lab Adv Polymer Mat, Zhongguancun North First St 2, Beijing 100190, Peoples R China 2.Univ Chinese Acad Sci, Coll Chem & Chem Engn, 19A Yuquan Rd, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Lou, Pingping,Zhang, Xuezhong,Liu, Bozheng,et al. Synthesis and thermal degradation mechanism of polyorganocarboranesiloxanes containing m-carboranylmethyl unit[J]. POLYMER DEGRADATION AND STABILITY,2017,144:304-314. |
| APA | Lou, Pingping,Zhang, Xuezhong,Liu, Bozheng,Gao, Xiyin,Zhang, Zhijie,&Xie, Zemin.(2017).Synthesis and thermal degradation mechanism of polyorganocarboranesiloxanes containing m-carboranylmethyl unit.POLYMER DEGRADATION AND STABILITY,144,304-314. |
| MLA | Lou, Pingping,et al."Synthesis and thermal degradation mechanism of polyorganocarboranesiloxanes containing m-carboranylmethyl unit".POLYMER DEGRADATION AND STABILITY 144(2017):304-314. |
入库方式： OAI收割
来源：化学研究所
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