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Neodymium-catalyzed Polymerization of C5 Fraction: Efficient Synthesis of 1,3-Pentadiene-isoprene Copolymer Rubbers

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Abstract

The polymerization of C5 fraction without separation and concentration by using a commercial available Nd(P204)3/ AliBu3/AlEt2Cl has afforded for the first time a new kind of 1,3-pentadiene-isoprene random copolymers as rubber materials. Isoprene (IP) and E-1,3-pentadiene (EPD) acted as polymerization monomers, cyclopentadiene acted as poison, and other substances like alkanes, monoolefins, Z-1,3-pentadiene acted as solvents in this multicomponent C5 fraction polymerization system. The data of kinetic experiments, NMR, and DSC indicated that the polymerization of C5 fraction by Nd(P204)3/AliBu3/AlEt2Cl afforded the IP-EPD random copolymers. By controlling polymerization conditions such as [Al]/[Nd]/[Cl] molar ratio and polymerization temperature, the random EPD-IP copolymers containing high cis-1,4-poly(IP) (with selectivity 96%) and moderate cis-1,4-poly(EPD) (with selectivity 60%) units with a low glass transition temperature (about −60 °C), controllable molecular weight (Mn = 3.8 × 104‒14.3 × 104), and moderate molecular weight distribution (Mw/Mn = 2.17‒2.78) were obtained in a high yield.

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Acknowledgments

This work was financially supported by the National Natural Science Foundation of China (No. 21674016).

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Authors and Affiliations

  1. State Key Laboratory of Fine Chemicals, Department of Polymer Science and Engineering, School of Chemical Engineering, Dalian University of Technology, Dalian, 116012, China

    Jin-Yan Hou, Fang Guo, Yang Li & Zhao-Min Hou

  2. Fushun Yikesi New Material Co., Ltd., Fushun, 113000, China

    Qian Hu

  3. Advanced Catalysis Research Group, RIKEN Center for Sustainable Resource Science, 2-1 Hirosawa, Wako, Saitama, 351-0198, Japan

    Zhao-Min Hou

Authors
  1. Jin-Yan Hou
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  2. Fang Guo
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  3. Qian Hu
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  4. Yang Li
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  5. Zhao-Min Hou
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Correspondence to Fang Guo.

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Hou, JY., Guo, F., Hu, Q. et al. Neodymium-catalyzed Polymerization of C5 Fraction: Efficient Synthesis of 1,3-Pentadiene-isoprene Copolymer Rubbers. Chin J Polym Sci 37, 674–680 (2019). https://doi.org/10.1007/s10118-019-2244-x

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