Stereoselective polymerization of rac-lactide using a monoethylaluminum Schiff base complex
文献类型：期刊论文
| 作者 | Tang ZH ; Chen XS ; Pang X ; Yang YK ; Zhang XF ; Jing XB |
| 刊名 | biomacromolecules
 |
| 出版日期 | 2004 |
| 卷号 | 5期号:3页码:965-970 |
| 关键词 | RING-OPENING POLYMERIZATION STEREOCOMPLEX FORMATION POLY(LACTIC ACID) SINGLE-SITE ALKOXIDE CATALYST BLOCK-COPOLYMERS INITIATOR SYSTEM RACEMIC LACTIDE CYCLIC ESTERS MECHANISM |
| ISSN号 | 1525-7797 |
| 通讯作者 | chen xs |
| 中文摘要 | a monoethylaluminum schiff base complex (2) with formula la1et (l = n,n'-(2,2-dimethylpropylene)bis(3,5-di-tei-t-butylsalicylideneimine) was synthesized and employed for the stercoselective ring-opening polymerization of rac-lactide (rac-la). the complex 2 was characterized by nuclear magnetic resonance, crystal structure, and elemental analysis. it contains a five-coordinate aluminum atom with distorted trigonal bipyramidal geornetry in the solid state. in the presence of 2-propanol, 2 showed high stereoselectivity for the polymerization of rac-la. the polymerization yielded crystalline poly(rac-la) with a high melting temperature (193-201 degreesc). nmr, differential scanning calorimetry, and wide-angle x-ray diffraction indicated that the poly(rac-la) was highly isotactic, and a stereocomplex was formed between poly-l- and poly-d-lactide block sequences. by the analysis of electrospray-ionization mass spectrometry and h-1 nmr, the polymer was demonstrated to be endcapped in both terminals with an isopropyl ester and a hydroxy group, respectively. the polymerization was of first order in rac-la concentration. the relationship between the rac-la conversion and molecular weights of the polymer was linear so that the polymerization could be well controlled. |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000221315200046 |
| 公开日期 | 2010-08-17 |
| 源URL | [http://202.98.16.49/handle/322003/15463]  |
| 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 | Tang ZH,Chen XS,Pang X,et al. Stereoselective polymerization of rac-lactide using a monoethylaluminum Schiff base complex[J]. biomacromolecules,2004,5(3):965-970. |
| APA | Tang ZH,Chen XS,Pang X,Yang YK,Zhang XF,&Jing XB.(2004).Stereoselective polymerization of rac-lactide using a monoethylaluminum Schiff base complex.biomacromolecules,5(3),965-970. |
| MLA | Tang ZH,et al."Stereoselective polymerization of rac-lactide using a monoethylaluminum Schiff base complex".biomacromolecules 5.3(2004):965-970. |
入库方式： OAI收割
来源：长春应用化学研究所
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