Supported rare earth catalysts were made from Nd (O-i-Pr)3 and the chlorides as well asbromides of the elements of I A and Ⅱ A groups which were used as supporters of the catalyst. In thestudy on the relationship between the composition of supporters and the polymerization activity of bu-tadiene in the presence of the supported rare earth catalysts, it was found that the electronegativity of I A or Ⅱ A elements has an obvious effect on the activity of supported catalysts, that is the activity ofthe supported catalyst increases with the increasing of the electronegativity. This phenomenon is ex-plained in terms of the interaction between the HOMO of the butadiene and the LUMO of theneodymium. This rule also holds in the case when halides of magnesium were used as supporters.
参考文献
| [1] | YANG Ji-Hua (杨继华),HU Jing-Yu (扈晶余),PANG Shu-Fen (逄束芬),et al. Zhongguo Kexue (中国科学),1980,(2)：127 |
| [2] | Shan Chengji, Lin Yonghua, Ouyang Jun, et al. Macromol Chem, 1987, 188: 629 |
| [3] | SHAN Cheng-Ji (单成基), OUYANG Jun (欧阳均).Cuihua Xuebao (催化学报),1989,10(1)：107 |
| [4] | CAI Shi-Mian (蔡世绵),IAO Shi-Jing (肖士镜),LIU Huan-Qin (刘焕勤).Cuihua Xuebao (催化学报),1984,5(3)：287 |
| [5] | Teaching and Research Group of Inorganic Chemistry, Department of Chemistry, Beijing Normal University ) (Auths)(北京师范大学化学系机化学教研室编).Concise Handbook of Chemistry(简明化学手册).Beijing(北京): Beijing Press(北京出版社),1980：54 |
| [6] | HUANG Bao-Tong(黄葆同),OUYANG Jun(欧阳均)Auths(著).Coordination Polymerization andSynthetic Rubber(络和催化聚合合成橡胶).jing(北京):Science Press(科学出版社),1981：128 |
| [7] | Matsumoto T,Furukawa J. J Macromol Sci,Chem A,1972,6(2) :218 |
| [8] | Ledwith A, Sherrington D C. Reactivity, Mechanism and Structure in Polymer Chemistry. Jenkins A D, Ledwith A, Eds. London: John Wiley &Sons, 1974..441 |
| [9] | Dawans F, Ph. Teyssie, Organic Coatings and Plastic, Chemistry Division, ACS/CIC Meeting,Toronto ,Canada, 1970: 208 |
| [10] | OUYANG Jun(欧阳均)Auth(编著).Rare EarthCatalysts and Polymerization(稀土催化剂与聚合).Jilin(吉林)：Jilin Science and TechnologyPress(吉林科学技术出版社),1991：182 |
| [11] | James C W Chien, Jun-Chen Wu. J Polym Sci,Polym Chem Edn, 1982,20(9): 2461 |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%