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Iranian Polymer Journal

, Volume 27, Issue 8, pp 537–544 | Cite as

m-Cresol-substituted triethyl aluminum/MoCl5/TBP catalytic system for coordination polymerization of butadiene

  • Peipei Li
  • Kai Liu
  • Binbin Zhang
  • Jinhui Liu
  • Jing Hua
Original Research
  • 57 Downloads

Abstract

Coordination polymerization of butadiene was initiated by a catalyst system consisting of tributyl phosphate (TBP) as ligand, molybdenum pentachloride as primary catalyst and triethyl aluminum substituted by m-cresol as co-catalyst. The effects of the substitution of m-cresol on the activity of the catalyst system, molecular weight and molecular weight distribution, intrinsic viscosity and microstructures of the resulting polymers were investigated in details. The molecular weight and molecular weight distribution of the polymerization products were determined by GPC. The microstructure of the polymerization products was characterized by FTIR, 13C NMR and DSC techniques. The experimental results indicated that the polymerization activity of the reaction system and the molecular weight of the polymerization products gradually increased with the increase of the substitution content of m-cresol, namely, Al(OPhCH3)2Et > Al(OPhCH3)Et2 > Al(OPhCH3)0.5Et2.5>AlEt3. The 1,2-structure contents of the polymerization products could be adjusted between 89 and 91% through the control of the substitution of m-cresol, and there was minute quantities of crystalline structures in the resulting polymers due to the increasing content of the syndiotactic 1,2-polybutadiene. In a word, the existence and increase of steric hindrance of m-cresol made it easier for polymerization products to form interdisciplinary 1,2-structure.

Keywords

Mo-based catalyst 1,2-Polybutadiene m-Cresol Catalytic activity Crystalline structure 

Notes

Acknowledgements

The authors acknowledge the support of Natural Science Foundation of Shandong province, China (no. ZR 2016 EMM03).

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Copyright information

© Iran Polymer and Petrochemical Institute 2018

Authors and Affiliations

  • Peipei Li
    • 1
  • Kai Liu
    • 1
  • Binbin Zhang
    • 1
  • Jinhui Liu
    • 1
  • Jing Hua
    • 1
  1. 1.Key Laboratory of Rubber-Plastics, Ministry of Education/Shandong Provincial Key Laboratory of Rubber-plasticsQingdao University of Science and TechnologyQingdaoChina

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