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Citation: Chen Dianbao, Liang Yuhua, He Zhaoping, Zhong Chongqi, Tang Xueming. MAGNETIC ANALYSIS OF NICKEL CATALYST SYSTEM FOR BUTADIENE POLYMERIZATION[J]. Chinese Journal of Applied Chemistry, ;1992, 9(5): 50-55. shu

MAGNETIC ANALYSIS OF NICKEL CATALYST SYSTEM FOR BUTADIENE POLYMERIZATION

1.
Qingdao Institute of Chemical Technology, Qingdao 266042

Corresponding author: Chen Dianbao,
Received Date: 4 December 1991
Available Online: 4 December 1991
Fund Project:

The magnetisms of both the common nickel catalyst system, Ni(naph)₂-Al(i-Bu)₃-BF₃OEt₂-C₄H₆, and modified nickel catalystlsystems, Ni(naph)₂-AI(i-Bu)₂(OR)-BF₃OEt₂-C₄H₆(-OR is -OPh, -OPhCH₃, -OPhC₈H₁₈, and -OC₈H₁₇), were measured. The order of the reducibility of the coeatalysts in the nickel catalyst systems as follows:Al(i-Bu)₃ > Al(i-Bu)₂(OPhC₈H₁₇) > Al(i)-Bu)₂(OPhCH₃) > Al(i-Bu)₂(OPh) > Al(i-Bu)₂(OC₈H₁₇).For Ni(naph)₂-Al(i-Bu)₂(OC₈H₁₇)-BF₃OEt₂ system, Ni(Ⅱ) was mainly reduced to Ni (Ⅰ), during the pdynierization reation while Ni(Ⅰ) and Ni(0) were round in coexistence for other nickel catalyst systems. The aggregation of Ni(0) in Ni(naph)₂-Bd-At(i-Bu)₂(OPh) and Ni(naph)₂-Bd-Al(i-Bu)₂(OPhCH₃) systems was ferromagnetic, and it was paramagnetic in other systems.
- butadiene,
- Polymerization,
- nickel catalyst system,
- magnetic susceptibility
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