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Lanthanide complexes mediated coordinative chain transfer polymerization of conjugated dienes

Science China(Technological Sciences) 2018年第9期61卷 1286-1294页

作者： WANG Feng LIU Heng HU YanMing ZHANG XueQuan Key Laboratory of Synthetic Rubber Changchun Institute of Applied Chemistry Chinese Academy of Sciences

Tremendous advances has been witnessed in the past few years in the lanthanide complexes mediated coordinative chain transfer polymerization(CCTP) of conjugated dienes. CCTP features catalyst economy, well-controlling over both microstructure and architecture of the resulting polymers, and accessibility for novel(co)polymers. This review highlights the recent progresses made in the field of CCTP of dienes. After a brief introduction, the body of this review is divided into three parts:(1) principle of CCTP;(2) coordinative chain transfer homopolymerization of dienes;(3) coordinative chain transfer copolymerization of *** the end, we present some challenges remaining in this area and our personal opinion regarding where this field should continue to develop. CCTP represents a novel strategy to prepare polydiene synthetic rubbers with controlled high molecular weight and narrow molecular weight distribution, which has reached the practical industrial application level, demonstrating a great potential in industrialization.

关键词： coordinative chain transfer polymerization dienes lanthanide complexes

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Polyisoprene Bearing Dual Functionalized Mini-blocky chain-ends Prepared from Neodymium-mediated coordinative chain transfer polymerizations

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Chinese Journal of Polymer Science 2023年第5期41卷 720-727,I0008页

作者： Wei-Xin Wang Wen-Peng Zhao Jing Dong Hua-Qiang Zhang Feng Wang Heng Liu Xue-Quan Zhang Key Laboratory of Rubber-Plastics Ministry of EducationShandong Provincial Key Laboratory of Rubber-PlasticsQingdao University of Science&TechnologyQingdao 266042China Petrochemical Research Institute PetroChinaBeijing 102206China School of Chemical Engineering Changchun University of TechnologyChangchun 130012China

Through neodymium-mediated coordinative chain transfer copolymerizaiton(CCTcoP),polyisoprenes bearing dual hydroxylated mini-blocky chain-ends were prepared via a three-step *** studies revealed that,the polymerization demonstrated typical features of CCTcoP across the whole polymerization process,i.e.,quasi-living polymerization characteristic,tunable molecular weights,narrow molecular weight distributions,and atom *** to previously reported CCTP homopolymerization systems,the presence of oxygen-containing IpOAl polar comonomer slowed down chain transfer rates obviously,rendering slightly higher molecular weights of the resultant PIps and smaller Np(number of polymer chains per Nd atom)***,to mimic the structure of natural rubber,the hydroxyl end groups can be facilely modified into phosphonate,amide,and UPy,whose structures were further confirmed by NMR *** these functionalities could greatly improve the hydrophilic properties of the polymers,as revealed from the significantly reduced static water contact angles.

关键词： Functional polyisoprene Neodymium coordinative chain transfer polymerization Synthetic rubber

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