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篇目详细内容 |
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【篇名】 |
Polymerization of styrene catalyzed by rare earth Schiff base complexes |
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【刊名】 |
Frontiers of Chemistry in China |
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【刊名缩写】 |
Front. Chem. China |
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【ISSN】 |
1673-3495 |
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【EISSN】 |
1673-3614 |
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【DOI】 |
10.1007/s11458-008-0003-6 |
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【出版社】 |
Higher Education Press and Springer-Verlag |
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【出版年】 |
2008 |
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【卷期】 |
3
卷1期 |
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【页码】 |
6-9
页,共
4
页 |
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【作者】 |
NI Xufeng;
YANG Jianjiang;
SHEN Zhiquan;
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【关键词】 |
rare earth Schiff base complex; styrene; polymerization |
【摘要】 |
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The rare earth Schiff base complex Nd(H2Salen)2Cl32C2H5OH was synthesized by a simple and convenient method and characterized by IR and elemental analysis. The catalyst system composed of Nd(H2Salen)2Cl32C2H5OH/Al(i-Bu)3/CCl4 is effective for the polymerization of styrene (St). The optimum conditions are as follows: [St]/[Nd] = 1000, [CCl4]/[Nd] = 9, [Al]/[Nd] = 30, and polymerization at 50°C for 20 h. The resulting polystyrene was characterized by NMR and GPC. The results of NMR show that the polymer obtained had a stereoregularity with 52.3% isotacticity and 47.7% syndiotacticity without any random structure. |
