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April 29, 2026PolymersOpen Access

Preparation of Low Molecular Weight Liquid Polybutadiene Rubber Featuring High 1,4 Content by Nickel-Based Ziegler–Natta Catalytic System

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Authors

HSHan SunChinese Academy of Tropical Agricultural SciencesHLHeng LiuXZXi ZhangGeneral Cardiology

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Implication

Randomized trial reveals structure–reactivity relationships in low molecular weight polybutadiene synthesis, suggesting optimized parameters for industrial applications.

Key Points

  • This research aims to develop a ligand-free nickel-based catalytic system for synthesizing low molecular weight liquid polybutadiene with high 1,4 content.
  • Developed a ligand-free Ni(acac)2/EASC Ziegler–Natta catalytic system for synthesis.
  • Systematically investigated the effects of Al/Ni ratio, polymerization temperature, monomer-to-catalyst ratio, and external donors on polymerization.
  • Assessed structure–reactivity relationships to optimize catalytic activity and molecular weight control.
  • Increasing the Al/Ni ratio enhances catalytic activity while reducing molecular weights and broadened molecular weight distributions.
  • Higher polymerization temperatures resulted in a transition from kinetically favored cis-1,4 insertion to increased trans-1,4 incorporation.
  • Maintained high 1,4 content (>98%) despite variations in polymerization conditions.

Cite This Study

Sun et al. (2026) studied this question.

synapsesocial.com/papers/69f1a08eedf4b46824807149https://doi.org/10.3390/polym18091051
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