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<p>Within the framework of the global dual-carbon strategy, this study presents a sustainable process for the one-step synthesis of 1,4-cyclohexanedimethanol-based polycarbonate (PCMC) utilizing raw materials sourced from spent lithium battery electrolytes. The study examines the impact of incorporating 1,3-propanediol (PDO) into poly(1,4-cyclohexanedimethylene carbonate) (PCMC). Fourier Transform Infrared Spectroscopy (FTIR) confirmed the successful incorporation of PDO, evidenced by the presence of hydroxyl (-OH) groups and shifts in carbonyl (C = O) and ether (C-O-C) vibrations. Differential Scanning Calorimetry (DSC) indicated a reduction in glass transition temperature (<i>T</i><sub>g</sub>) and a decrease in crystallinity with increasing PDO content, as evidenced by broader and lower melting peaks. Thermogravimetric Analysis (TGA) showed improved thermal stability, characterized by a delayed onset of decomposition and higher char residue at elevated PDO levels. The reduction in complex viscosity and enhancement in chain flexibility facilitate processing but may affect melt strength. Dynamic mechanical analysis revealed enhanced viscoelastic behavior and energy dissipation in PDO-modified PCMC samples. Collectively, the addition of PDO improves the flexibility, thermal stability, and processability of PCMC, rendering it suitable for applications that necessitate deformability and ease of fabrication.</p>

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Preparation of 1,4-cyclohexane dimethanol -based polycarbonate from spent electrolyte

  • 期刊论文

  • 发表日期：

    2026年5月28日

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  • Mingwang Zhang,
  • Shuo Dong,
  • Ruibo Wang,
  • Siyu Tan,
  • Zhijiong Wu,
  • Guanyu Ren,
  • Shaokang Mo,
  • Baisen Huang,
  • Haiyue Wang

摘要

Within the framework of the global dual-carbon strategy, this study presents a sustainable process for the one-step synthesis of 1,4-cyclohexanedimethanol-based polycarbonate (PCMC) utilizing raw materials sourced from spent lithium battery electrolytes. The study examines the impact of incorporating 1,3-propanediol (PDO) into poly(1,4-cyclohexanedimethylene carbonate) (PCMC). Fourier Transform Infrared Spectroscopy (FTIR) confirmed the successful incorporation of PDO, evidenced by the presence of hydroxyl (-OH) groups and shifts in carbonyl (C = O) and ether (C-O-C) vibrations. Differential Scanning Calorimetry (DSC) indicated a reduction in glass transition temperature (Tg) and a decrease in crystallinity with increasing PDO content, as evidenced by broader and lower melting peaks. Thermogravimetric Analysis (TGA) showed improved thermal stability, characterized by a delayed onset of decomposition and higher char residue at elevated PDO levels. The reduction in complex viscosity and enhancement in chain flexibility facilitate processing but may affect melt strength. Dynamic mechanical analysis revealed enhanced viscoelastic behavior and energy dissipation in PDO-modified PCMC samples. Collectively, the addition of PDO improves the flexibility, thermal stability, and processability of PCMC, rendering it suitable for applications that necessitate deformability and ease of fabrication.