| 二(三氟乙酸)卤化钕催化体系中卤素对催化共轭双烯烃聚合的影响 |
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| 引用本文： | 李兴民,金鹰泰,李贵生,孙玉芳,欧阳均. 二(三氟乙酸)卤化钕催化体系中卤素对催化共轭双烯烃聚合的影响[J]. 应用化学, 1986, 0(2): 77-80 |
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| 作者姓名： | 李兴民 金鹰泰 李贵生 孙玉芳 欧阳均 |
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| 作者单位： | 中国科学院长春应用化学研究所 |
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| 摘 要： | 众所周知,稀土配位催化剂用于共轭双烯的定向聚合,卤素是形成活性中心的必要条件之一。文献上对卤素在稀土催化剂中的作用曾有研究,但报导的都是非均相催化体系和三元催化体系。均相的二元催化体系中的卤素作用尚未见文献报导。鉴于从可溶性(CF3COO)2NdClEtOH-Et3Al体系中分离出含卤素原子的活性体,研究卤素在该体系中的作用,对于活性催化剂的形成条件和催化聚合反应机制的了解都有意义。
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| 收稿时间： | 1985-04-12 |
| 修稿时间： | 1985-07-10 |
EFFECT OF HALOGEN IN(CF3COO)2 NdX·Et0H-R3 AI CATALYST SYSTEM ON THE POLYMERIZATION OF CONJUGATED DIENES |
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| Li Xingmin,Jin Yingtai,Li Guisheng,Shun Yufang,Ouyang Jun. EFFECT OF HALOGEN IN(CF3COO)2 NdX·Et0H-R3 AI CATALYST SYSTEM ON THE POLYMERIZATION OF CONJUGATED DIENES[J]. Chinese Journal of Applied Chemistry, 1986, 0(2): 77-80 |
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| Authors: | Li Xingmin Jin Yingtai Li Guisheng Shun Yufang Ouyang Jun |
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| Affiliation: | Changchun Institute of Applied Chemistry, Academia Sinica |
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| Abstract: | The effect of halogen atom in the (CF3COO)2NdX·EtOH-R3Al (X:Cl, Br,I;R:Et,i-Bu) catalyst system on the polymerization of butadiene or isoprene has been studied. The results indicate that the catalyst containing halogen atom with higher eletro-negativity is more active. The intrinsic viscosities of polybutadiene and polyisoprene catalyzed with (CF3COO)2NdX·EtOH-Et3Al system were found in the order of Br>Cl>I while that obtained with (CF3 COO)2NdX·EtOH-i-Bu3Al system Cl>Br>I. The catalysts with different halogen lead to the microstructure change of the polymer obtained, but the active species of the catalyst system have little effect on the cis-contents of polymers. |
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