Synthesis of isotactic polystyrene with a rare-earth catalyst
文献类型：期刊论文
| 作者 | Liu L ; Gong Z ; Zheng YL ; Jing XB |
| 刊名 | journal of polymer science part a-polymer chemistry
 |
| 出版日期 | 1998 |
| 卷号 | 36期号:11页码:1773-1778 |
| 关键词 | SYNDIOTACTIC POLYSTYRENE POLYMERIZATION STYRENE SYSTEM |
| ISSN号 | 0887-624x |
| 通讯作者 | gong z |
| 中文摘要 | polymerization of styrene with the neodymium phosphonate nd(p-507)/h2o/al(i-bu)(3) catalytic system has been examined. the polymer obtained was separated into a soluble and an insoluble fraction by 2-butanone extraction. c-13-nmr spectra indicate that the insoluble fraction is isotactic polystyrene and the soluble one is syndiotactic-rich atactic polystyrene. the polymerization features are described and discussed. the optimum conditions for the polymerization are as follows: [nd] = (3.5-5.0) x 10(-2) mol/l; [styrene] = 5 mol/l; [al]/[nd] = 6-8 mol/mol; [h2o]/[al] = 0.05-0.08 mol/mol; polymerization temperature around 70 degrees c. the percent yield of isotactic polystyrene (ty) is markedly affected by catalyst aging temperature. with increase of the aging temperature from 40 to 70 degrees c, ty increases from 9% to 48%. using alet3 and al(i-bu)(2)h instead of al(i-bu)(3) decreases the yield of isotactic polystyrene. different neodymium compounds give the following activity order: nd(p-507)(3) > nd(p-204)(3) > nd(opri)(3) > ndcl3 + c2hf5oh > nd(naph)(3). with nd(naph)(3) as catalyst, only atactic polystyrene is obtained. (c) 1998 john wiley & sons, inc. |
| 收录类别 | SCI收录期刊论文 |
| 语种 | 英语 |
| WOS记录号 | WOS:000074604700010 |
| 公开日期 | 2010-11-04 |
| 源URL | [http://202.98.16.49/handle/322003/22875]  |
| 专题 | 长春应用化学研究所_长春应用化学研究所知识产出_期刊论文 |
| 推荐引用方式 GB/T 7714 | Liu L,Gong Z,Zheng YL,et al. Synthesis of isotactic polystyrene with a rare-earth catalyst[J]. journal of polymer science part a-polymer chemistry,1998,36(11):1773-1778. |
| APA | Liu L,Gong Z,Zheng YL,&Jing XB.(1998).Synthesis of isotactic polystyrene with a rare-earth catalyst.journal of polymer science part a-polymer chemistry,36(11),1773-1778. |
| MLA | Liu L,et al."Synthesis of isotactic polystyrene with a rare-earth catalyst".journal of polymer science part a-polymer chemistry 36.11(1998):1773-1778. |
入库方式： OAI收割
来源：长春应用化学研究所
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