Synthesis of a difunctional organolithium compound as initiator for the polymerization of styrene-butadiene/isoprene-styrene triblock copolymer
文献类型：期刊论文
| 作者 | Lu, ZX; Xu, HD; Li, Y; Hu, YL |
| 刊名 | Journal of applied polymer science
 |
| 出版日期 | 2006-04-15 |
| 卷号 | 100期号:2页码:1395-1402 |
| 关键词 | Difunctional organolithium Addition reaction Block copolymers Phase separation Glass transition Anionic polymerization |
| ISSN号 | 0021-8995 |
| DOI | 10.1002/app.23666 |
| 通讯作者 | Li, y(xu_hd@ribypec.com) |
| 英文摘要 | A difunctional organolithium compound was prepared by the addition of butyllithium (buli) to 1,4-bis(4-meth-1-phenlethenyl)benzene (mpeb). the effects of the solvent, polar modifier (thf), butyl lithium structure, and reaction time on the formation of the difunctional organolithium compound were studied. results showed that toluene as solvent was in favor of the addition reaction over cycohexane, in the absence of the polar modifier. however, cycohexane was a better option as solvent for the addition reaction, when polar modifier was employed. a small amount of polar modifier could efficiently accelerate the reaction rate and have no significant effect on the structure of the polydiene, which was initiated by the polar modifier containing organolithium compound. results also showed that isobutyl lithium was more active in the addition reaction than n-butyl lithium, because of inductive effect. the optimum molar ratio of thf/li+ was determined as 4. the thf containing difunctional organolithium cyclohexane solution was sequentially used in the step-wise polymerization of triblock thermoplastic copolymer sibs. the so-prepared sibs shared the similar phase separation structure with sbs and exhibited excellent mechanic properties. as the content of the central polyisoprene block increases, the tensile strength of the copolymer is decreased, and the elongation at break is increased. the glass transition temperature t-g of the central block was correlated with its content as t-g = 0.33 x -62.81, where x is the wt % of the central block, based on the triblock copolymer. |
| WOS关键词 | DILITHIUM INITIATORS ; METHACRYLATE |
| WOS研究方向 | Polymer Science |
| WOS类目 | Polymer Science |
| 语种 | 英语 |
| WOS记录号 | WOS:000235556400067 |
| 出版者 | WILEY-BLACKWELL |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2378518 |
| 专题 | 中国科学院大学 |
| 通讯作者 | Li, Y |
| 作者单位 | 1.Chinese Acad Sci, Key Lab Engn Plast, Joint Lab Polymer Sci & Mat, Inst Chem, Beijing 100080, Peoples R China 2.Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China 3.Beijing Yanshan Petrochem Co Ltd, Res Inst, Beijing 102500, Peoples R China |
| 推荐引用方式 GB/T 7714 | Lu, ZX,Xu, HD,Li, Y,et al. Synthesis of a difunctional organolithium compound as initiator for the polymerization of styrene-butadiene/isoprene-styrene triblock copolymer[J]. Journal of applied polymer science,2006,100(2):1395-1402. |
| APA | Lu, ZX,Xu, HD,Li, Y,&Hu, YL.(2006).Synthesis of a difunctional organolithium compound as initiator for the polymerization of styrene-butadiene/isoprene-styrene triblock copolymer.Journal of applied polymer science,100(2),1395-1402. |
| MLA | Lu, ZX,et al."Synthesis of a difunctional organolithium compound as initiator for the polymerization of styrene-butadiene/isoprene-styrene triblock copolymer".Journal of applied polymer science 100.2(2006):1395-1402. |
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来源：中国科学院大学
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