Kinetics of the anionic ring-opening polymerization of octamethylcyclotetrasiloxane initiated by potassium isopropoxide
文献类型：期刊论文
| 作者 | Zhang, Yong; Zhang, Zhijie; Wang, Qian; Xie, Zemin |
| 刊名 | JOURNAL OF APPLIED POLYMER SCIENCE
 |
| 出版日期 | 2006-11-15 |
| 卷号 | 102期号:4页码:3510-3516 |
| 关键词 | Anionic Polymerization Ring-opening Polymerization Polysiloxanes Activation Energy Kinetics |
| ISSN号 | 0021-8995 |
| DOI | 10.1002/app.24665 |
| 英文摘要 | Kinetics of the anionic ring-opening polymerization of octamethylcyclotetrasiloxane (D-4) in bulk initiated by potassium isopropoxide was studied. Several promoters including N-methyl-2-pyrrolidinone (NMP), N,N-dimethylformamide (DMF), and diglyme were used. It is indicated that the reactions are first-order in D-4 during the initial stage of polymerization. The polymerization rate of D-4 is influenced by a number of factors, such as the nature of promoters, the molar ratio of promoter to initiator (C-p/C-i ratio), and the reaction temperatures. With the use of NMP as promoter, the polymerization rate constant at 30 degrees C is 10.482 h(-1) with the C-p/C-i ratio equal to 3.0. As the C-p/C-i ratio increases, the polymerization rate constant increases sharply and the cyclic oligomers content in polymer decreases evidently. The back-biting reaction that leads to the formation of decamethylcyclopentasiloxane (D-5) occurred in the polymerization of D-4. The rate of the D-5 formation relatively to the rate of D-4 conversion increases with the conversion of D-4. (c) 2006 Wiley Periodicals, Inc. |
| 语种 | 英语 |
| WOS记录号 | WOS:000241004000056 |
| 出版者 | JOHN WILEY & SONS INC |
| 源URL | [http://ir.iccas.ac.cn/handle/121111/59495]  |
| 专题 | 中国科学院化学研究所 |
| 通讯作者 | Zhang, Zhijie |
| 作者单位 | 1.Chinese Acad Sci, Inst Chem, Ctr Mol Sci, Beijing 100080, Peoples R China 2.Chinese Acad Sci, Grad Sch, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhang, Yong,Zhang, Zhijie,Wang, Qian,et al. Kinetics of the anionic ring-opening polymerization of octamethylcyclotetrasiloxane initiated by potassium isopropoxide[J]. JOURNAL OF APPLIED POLYMER SCIENCE,2006,102(4):3510-3516. |
| APA | Zhang, Yong,Zhang, Zhijie,Wang, Qian,&Xie, Zemin.(2006).Kinetics of the anionic ring-opening polymerization of octamethylcyclotetrasiloxane initiated by potassium isopropoxide.JOURNAL OF APPLIED POLYMER SCIENCE,102(4),3510-3516. |
| MLA | Zhang, Yong,et al."Kinetics of the anionic ring-opening polymerization of octamethylcyclotetrasiloxane initiated by potassium isopropoxide".JOURNAL OF APPLIED POLYMER SCIENCE 102.4(2006):3510-3516. |
入库方式： OAI收割
来源：化学研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。