Cyclization Modification in Course of Cis-polymerization of Butadiene Initiated by Rare Earth Catalyst

Chinese Journal of Applied Chemistry ›› 1998, Vol. 0 ›› Issue (6): 57-60.

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Cyclization Modification in Course of Cis-polymerization of Butadiene Initiated by Rare Earth Catalyst

Wang Chaoyang, Yang Jihua, Dong Weimin, Pang Shufen

Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022

Received:1998-04-20 Revised:1998-09-04 Published:1998-12-10 Online:1998-12-10

Abstract

Abstract: Butadiene was polymerized to some extent in the presence of binary catalyst system NdCl₃·3i-PrOH-AlEt₃ in toluene and the allylchloride was then added to the solution in order to cyclize the formed polybutadiene and cyclopolymerize the unreacted butadiene monomers. Influ-ences of the amount of rare earth catalyst, molar ratio of allylchloride to AlEt₃, cyclization reaction time and temperature, and concentration of the monomers on the cyclization reaction have been investi-gated. The microstructures of the end polymers have been characterized by IR and ¹H NMR mea-surements.

Key words: butadiene, rare earth catalyst, cis-polymerization, allylchloride, cyclization, cyclopoly-merization

Wang Chaoyang, Yang Jihua, Dong Weimin, Pang Shufen. Cyclization Modification in Course of Cis-polymerization of Butadiene Initiated by Rare Earth Catalyst[J]. Chinese Journal of Applied Chemistry, 1998, 0(6): 57-60.

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Cyclization Modification in Course of Cis-polymerization of Butadiene Initiated by Rare Earth Catalyst

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