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Citation: TIAN Lin, BI Jifu, WU Guangfeng, ZHANG Xuequan. Studies on Butadiene Polymerization by Using Neodymium Chloride Ethylene Glycol Dimethyl Ether Complex as Catalyst[J]. Chinese Journal of Applied Chemistry, ;2013, 30(1): 16-21. doi: DOI:10.3724/SP.J.1095.2013.20063 shu

Studies on Butadiene Polymerization by Using Neodymium Chloride Ethylene Glycol Dimethyl Ether Complex as Catalyst

TIAN Lin ^a ,
BI Jifu ^b ,
WU Guangfeng ^a,, ,
ZHANG Xuequan ^b,,

1.
a Department of Chemical Engineering, Changchun University of Technology, Changchun 130012, China;
2.
b Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China

Corresponding author: WU Guangfeng, ZHANG Xuequan,
Received Date: 28 February 2012
Available Online: 25 April 2012

A neodymium chloride ethylene glycol dimethyl ether complex(NdCl₃·2DME) was synthesized and used as catalyst for butadiene polymerization.The effects of concentrations of alkylaluminium(AlR₃) and methylaluminoxane(MAO) cocatalysts,aging time and polymerization time on polymerization behaviors were investigated.Results show that the as-prepared catalyst displays high activity when both AlR₃ and MAO were used as cocatalysts, while the activity became much lower when AlR₃ or MAO as cocatalyst was used respectively.The highest catalytic activity was observed with the molar ratio of n(Nd):n(AlR₃):n(MAO) was 1:30:45.The catalytic activity,cis-1,4 content and molecular weight of the resulting polymer were much affected with variation of aging temperature of the catalyst system.The optimal aging temperature of the catalyst system was 50℃,while negative effect was observe when aging temperature was higher or lower.The contents of cis-1,4 and the total 1,4-unit of polybutadiene catalyzed by using current catalyst system were up to 98.7%(IR) and 99.6%(¹H NMR),respectively.
- butadiene,
- ethylene glycol dimethyl ether,
- rare earth chloride
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