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Citation: Dong Weimin, Yang Jihua, Pang Shufen, Huang Baotong. Conjugated Diene Polymerization Catalyzed by Polynuclear Nd-Al Bimetallic Complex Ⅲ.Influences of Solvent and Other Factors[J]. Chinese Journal of Applied Chemistry, ;1995, 12(1): 1-4. shu

Conjugated Diene Polymerization Catalyzed by Polynuclear Nd-Al Bimetallic Complex Ⅲ.Influences of Solvent and Other Factors

1.
Changchun Intstitute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022

Received Date: 3 June 1994
Available Online: 20 September 1994
Fund Project:

Conjugated diene solution polymerization catalyzed by polynuclear ND-Al bimetal-lic complex was further studied.Results indicate that the activity of the active species was imporved by appropriate sliaking time.The purity of the polymerization system and the sta-bility of the active species were examined by additional AlEt₃.The type of solvent had obvi-ously influence on the activity of the active species and the molecular weight of polymers ob-tained,the order of activity being toluene≥cyclohexane>n-hexane,and conversely,the or-der of[η]being toluene《 cyclohexane<n-hexane.Difference monomers had different fea-tures of stereospecific polymerization;cis-1,4 microstructure content of polybutadiene was lower and varied more obviously with the experimental conditions than that of polyisoprene.The results aid in deepgoing understanding of the stereospecific polymerization initiated by rare earthcatalyst.
- Nd-Al bimetallic complex,
- conjugated diene,
- stereospecific polymerization,
- sol-vent
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