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 |
| 通讯作者 | Zhang, zhijie(zhangzj@iccas.ac.cn) |
| 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. |
| WOS关键词 | CYCLOSILOXANES |
| WOS研究方向 | Polymer Science |
| WOS类目 | Polymer Science |
| 语种 | 英语 |
| WOS记录号 | WOS:000241004000056 |
| 出版者 | JOHN WILEY & SONS INC |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2379451 |
| 专题 | 中国科学院大学 |
| 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. |
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来源：中国科学院大学
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