Synthesis of Ultra-High-Molecular-Weight Polyethylene by Transition-Metal-Catalyzed Precipitation Polymerization  

作　　者：Wenbing Wang Quan Wang Chen Zou Changle Chen 

机构地区：[1]Key Laboratory of Precision and Intelligent Chemistry,Department of Polymer Science and Engineering,University of Science and Technology of China,Hefei 230026,China

出　　处：《Precision Chemistry》2024年第2期63-69,共7页精准化学（英文）

基　　金：This work was supported by National Key R&D Program of China(No.2021YFA1501700);National Natural Science Foundation of China(No.52025031,52203016,and 22261142664);USTC Research Funds of the Double First-Class Initiative(YD9990002018).

摘　　要：Ultra-high-molecular-weight polyethylene(UHMWPE)plays an important role in many important fields as engineering plastics.In this contribution,a precipitation polymerization strategy is developed by combination of highly active phosphino-phenolate nickel catalysts with polymer-insoluble solvent(heptane)to access UHMWPE(Mn up to 8.3×10^(6)g mol^(-1))with good product morphology,free-flowing characteristics,and great mechanical properties.Compared with the academically commonly used aromatic solvent(toluene),the utilization of heptane offers simultaneous enhancement in important parameters including activity,polymer molecular weight,and catalyst thermal stability.This system can also generate polar functionalized UHMWPE with molecular weight of up to 1.6×10^(6)g mol^(-1)in the copolymerization of ethylene with polar comonomers.More importantly,this precipitation polymerization strategy is generally applicable to several representative transition metal catalyst systems,leading to UHMWPE synthesis with good product morphology control.

关 键 词：transition metal catalysts POLYOLEFIN UHMWPE precipitation polymerization polar monomer 

分 类 号：TQ317[化学工程—高聚物工业]