STEREOSPECIFIC POLYMERIZATION OF ISOPRENE BY BINARY LANTHANIDE CATALYST

Chinese Journal of Applied Chemistry ›› 1992, Vol. 0 ›› Issue (3): 72-75.

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STEREOSPECIFIC POLYMERIZATION OF ISOPRENE BY BINARY LANTHANIDE CATALYST

Cai Xiaoping¹, Gong Zhi¹, Wang Foshong¹, Zhu Xinghao²

1. Changchun Institute of Applied Chemistry, Academia Sinica, Changchun 130022;
2. Research Institute of Jilin Chemical Industry Corporation, Jilin

Received:1991-04-08 Revised:1991-07-12 Published:1992-06-10 Online:1992-06-10

Abstract

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.

Key words: isoprene, lanthanide catalyst, stereospecific polymerization

Cai Xiaoping, Gong Zhi, Wang Foshong, Zhu Xinghao. STEREOSPECIFIC POLYMERIZATION OF ISOPRENE BY BINARY LANTHANIDE CATALYST[J]. Chinese Journal of Applied Chemistry, 1992, 0(3): 72-75.

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STEREOSPECIFIC POLYMERIZATION OF ISOPRENE BY BINARY LANTHANIDE CATALYST

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