Study on Catalytic Behavior of Iron-based Catalyst with IITP as Electron Donor in the Polymerization of Butadiene  

作　　者：Shi-Liang Xu Ying-Nan Zhao Yao Yu Qi Yang Li-Hua Na Heng Liu Chun-Yu Zhang Xue-Quan Zhang 

机构地区：[1]Key Laboratory of Advanced Rubber Material,Ministry of Education,School of Polymer Science and Engineering,Qingdao University of Science&Technology,Qingdao,266042,China [2]Shandong Provincial College Laboratory of Rubber Material and Engineering,School of Polymer Science and Engineering,Qingdao University of Science&Technology,Qingdao,266042,China [3]Key Lab of Rubber-Plastics,Ministry of Education/Shandong Provincial Key Lab of Rubber-plastics,School of Polymer Science and Engineering,Qingdao University of Science&Technology,Qingdao,266042,China

出　　处：《Chinese Journal of Polymer Science》2024年第5期612-619,I0007,共9页高分子科学（英文版）

基　　金：This work was financially supported by the National Key R&D Program of China(No.2022YFB3704700).

摘　　要：In this study,a novel iron-based catalyst system,Fe(acac)3/(isocyanoimino)triptenylphosphorane(IITP)/AlR3,was employed for the synthesis of syndiotactic 1,2-polybutadiene in hexane.This catalyst system exhibits remarkably high catalytic activity,achieving a polymerization activity of 762 kgpolymer·molcatalyst^(-1)·h^(-1)at 50℃with a[BD]/[Fe]molar ratio of 20000.Furthermore,living polymerization characteristic were observed during the investigation of the polymerization kinetics of 1,3-butadiene polymerization.These characteristics were well demonstrated by a narrow molecular weight distribution(PDI≈2.0)of the resulting polybutadiene and a linear relationship between-ln(1-c)and polymerization time as well as number average molecular weight and polymer yield.The resultant polymer showed a 1,2-selectivity of approximately 76%and stereoregularity ranging from 62%to 73%(rrrr).Additionally,through kinetic studies on polymerization reaction,an apparent activation energy Ea value of this catalytic system was calculated to be 84.98 kJ·mol^(-1),which suggests that high polymerization temperature favors efficient polymerization.

关 键 词：Iron catalyst Syndiotactic 1 2-polybutadiene Elastomers DONOR SELECTIVITY 

分 类 号：TQ316.3[化学工程—高聚物工业] O643.36[理学—物理化学]