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Nonequilibrium Anionic Ring-opening Polymerization of Tetraphenyltetramethylcyclotetrasiloxane (D-4(Me,Ph)) Initiated by Sodium Isopropoxide

文献类型：期刊论文

作者Gao, Xiyin1,2; Wang, Qian1; Sun, Hongjie1; Tan, Yongxia1; Zhang, Zhijie1; Xie, Zemin1
刊名PHOSPHORUS SULFUR AND SILICON AND THE RELATED ELEMENTS
出版日期2014-10-03
卷号189期号:10页码:1514-1528
关键词Backbiting Reaction Promoter Kinetics Anionic Polymerization
ISSN号1042-6507
DOI10.1080/10426507.2013.860534
英文摘要The nonequilibrium anionic ring-opening polymerization (NAROP) of tetraphenyltetramethylcyclotetrasiloxane (D-4(Me,Ph)) in the presence of initiator (sodium isopropoxide) and promoters including 12-crown-4, N-methyl-2-pyrrolidinone (NMP), N,N-dimethylformamide (DMF), and diglyme was investigated. It was found that the polymerization could be accelerated sharply by the increase of reaction temperature, as well as the mole ratio of promoter to initiator ([p]/ ratio). The NAROP rate of D-4(Me,Ph) decreased in the order of promoters: 12-crown-4>> NMP >DMF >diglyme. In the presence of NMP and sodium isopropoxide ([p]/ ratio = 3.0, 10h at 70 degrees C), the polydispersity index (PDI) of the poly(methylphenylsiloxane) obtained is 1.52, and the conversion rate of the monomer can reach over 90%. The byproduct pentaphenylpentamethylcyclopentasiloxane (D-5(Me,Ph)), which encountered in the 12-crown-4 promoted system upon prolonged reaction time, was not observed according to the Si-29 NMR of the reaction mixtures. In conclusion, NMP turned out to be the best choice among those promoters to realize the NAROP of D-4(Me,Ph).
语种英语
WOS记录号WOS:000345368100008
出版者TAYLOR & FRANCIS LTD
源URL[http://ir.iccas.ac.cn/handle/121111/51703]  
专题中国科学院化学研究所
通讯作者Gao, Xiyin
作者单位1.Chinese Acad Sci, Inst Chem, Lab Adv Polymer Mat, Beijing 100190, Peoples R China
2.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China
推荐引用方式
GB/T 7714		 Gao, Xiyin,Wang, Qian,Sun, Hongjie,et al. Nonequilibrium Anionic Ring-opening Polymerization of Tetraphenyltetramethylcyclotetrasiloxane (D-4(Me,Ph)) Initiated by Sodium Isopropoxide[J]. PHOSPHORUS SULFUR AND SILICON AND THE RELATED ELEMENTS,2014,189(10):1514-1528.
APA Gao, Xiyin,Wang, Qian,Sun, Hongjie,Tan, Yongxia,Zhang, Zhijie,&Xie, Zemin.(2014).Nonequilibrium Anionic Ring-opening Polymerization of Tetraphenyltetramethylcyclotetrasiloxane (D-4(Me,Ph)) Initiated by Sodium Isopropoxide.PHOSPHORUS SULFUR AND SILICON AND THE RELATED ELEMENTS,189(10),1514-1528.
MLA Gao, Xiyin,et al."Nonequilibrium Anionic Ring-opening Polymerization of Tetraphenyltetramethylcyclotetrasiloxane (D-4(Me,Ph)) Initiated by Sodium Isopropoxide".PHOSPHORUS SULFUR AND SILICON AND THE RELATED ELEMENTS 189.10(2014):1514-1528.

入库方式： OAI收割

来源：化学研究所

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