引用本文:
蔡小平, 龚志, 王佛松, 朱行浩. 二元稀土催化体系引发的异戊二烯定向聚合[J]. 应用化学,
1992, 9(3): 72-75.
Citation: Cai Xiaoping, Gong Zhi, Wang Foshong, Zhu Xinghao. STEREOSPECIFIC POLYMERIZATION OF ISOPRENE BY BINARY LANTHANIDE CATALYST[J]. Chinese Journal of Applied Chemistry, 1992, 9(3): 72-75.
Citation: Cai Xiaoping, Gong Zhi, Wang Foshong, Zhu Xinghao. STEREOSPECIFIC POLYMERIZATION OF ISOPRENE BY BINARY LANTHANIDE CATALYST[J]. Chinese Journal of Applied Chemistry, 1992, 9(3): 72-75.
二元稀土催化体系引发的异戊二烯定向聚合
English
STEREOSPECIFIC POLYMERIZATION OF ISOPRENE BY BINARY LANTHANIDE CATALYST
Abstract:
Nd(OPri)Cl2 in combination with AlEt3 is a binary lanthanide catalyst of higher activity for the stereospecific polymerization of isoprene. In this paper, the catalytic activity, as well as the microstruture of the polyisoprene are investigated. The experimental results show that it is a highly effective c talyst for the polymerization of isoprene to produce high cis-1,4 polyisoprene. The catalytic activity and the inherent viscosity[η] of the polyisoprene depend greatly on the amount of catalyst, the molar ratio of Al/Nd as well as the polymerization temperature. The cis-1,4 content of the polyisoprenes obtained is over 93% (determined by IR spectra) and the cis-1,4 level depends slightly on the polymerization conditions.
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Key words:
- isoprene
- / lanthanide catalyst
- / stereospecific polymerization
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