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<p>The cationic ring-opening copolymerization (ROCOP) of succinic anhydride (SA) and tetrahydrofuran (THF) was conducted using aluminium trifluoromethanesulfonate (Al(OTf)<sub>3</sub>) via bulk polymerization to synthesize poly(butylene succinate) (PBS). The molecular weight and ester content of products were regulated by constructing Lewis acid-base pairs through the introduction of co-catalysts. Compared with the control group without co-catalysts, the resulting products exhibited significant enhancements in molecular weight. The polyester product with 99% ester content was achieved by incorporating gallic acid as co-catalyst. When sodium dihydrogen phosphate (NaH<sub>2</sub>PO<sub>4</sub>) was employed as co-catalyst, a product with molecular weight of 4.0&#xa0;kDa was obtained. The employment of Lewis base as a co-catalyst yielded products with 86% ester content and molecular weight of 4.6&#xa0;kDa. The regulatory mechanism of Lewis acid-base pairs in this system was systematically investigated based on experimental results, demonstrating potential application prospects in industrial-scale production.</p>

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Lewis acid-base pair-regulated ring-opening copolymerization of succinic anhydride and tetrahydrofuran

  • 期刊论文

  • 发表日期：

    2026年3月23日

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  • Wenjun Lu,
  • Hongjun Yin,
  • Ting Li,
  • Jing Huang,
  • Xu-Hui Zhang,
  • Yang Wang,
  • Bihua Xia,
  • Shibo Wang,
  • Weifu Dong

摘要

The cationic ring-opening copolymerization (ROCOP) of succinic anhydride (SA) and tetrahydrofuran (THF) was conducted using aluminium trifluoromethanesulfonate (Al(OTf)3) via bulk polymerization to synthesize poly(butylene succinate) (PBS). The molecular weight and ester content of products were regulated by constructing Lewis acid-base pairs through the introduction of co-catalysts. Compared with the control group without co-catalysts, the resulting products exhibited significant enhancements in molecular weight. The polyester product with 99% ester content was achieved by incorporating gallic acid as co-catalyst. When sodium dihydrogen phosphate (NaH2PO4) was employed as co-catalyst, a product with molecular weight of 4.0 kDa was obtained. The employment of Lewis base as a co-catalyst yielded products with 86% ester content and molecular weight of 4.6 kDa. The regulatory mechanism of Lewis acid-base pairs in this system was systematically investigated based on experimental results, demonstrating potential application prospects in industrial-scale production.