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<p>In this study, a novel potassium carbonate/magnesium oxide (K₂CO₃/MgO) composite solid base catalyst was prepared via a wet impregnation method combined with nanoparticle agglomeration technology. This approach yielded a catalyst with a specific surface area of 21.3&#xa0;m²/g. The catalyst was successfully applied to the melt transesterification of hydrogenated bisphenol A (HBPA) and diphenyl carbonate (DPC), resulting in the synthesis of hydrogenated bisphenol A-based polycarbonate (HBPA-PC) with a weight-average molecular weight (M<sub>w</sub>) of 46,586&#xa0;g/mol. Through a synergistic activation mechanism, this catalyst significantly reduced the activation energy of the polymerization reaction to 41.53&#xa0;kJ/mol. The resulting polymer exhibited a decomposition temperature (T<sub>d5%</sub>) of 299.5&#xa0;°C, a glass transition temperature (T<sub>g</sub>) of 188&#xa0;°C, and excellent optical properties (light transmittance as high as 91.03%). The findings of this study provide a new strategy for the preparation of high-performance, non-toxic polycarbonate materials, demonstrating great potential for applications in the fields of medical devices and food packaging.</p>

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Study on the synthesis of high-molecular-weight hydrogenated bisphenol A-based polycarbonates using K2CO3/MgO composite catalysts

  • 期刊论文

  • 发表日期：

    2026年6月3日

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  • Xinle Yang,
  • Wushan Sun,
  • Chen Li,
  • Qingyin Wang,
  • Gongying Wang

摘要

In this study, a novel potassium carbonate/magnesium oxide (K₂CO₃/MgO) composite solid base catalyst was prepared via a wet impregnation method combined with nanoparticle agglomeration technology. This approach yielded a catalyst with a specific surface area of 21.3 m²/g. The catalyst was successfully applied to the melt transesterification of hydrogenated bisphenol A (HBPA) and diphenyl carbonate (DPC), resulting in the synthesis of hydrogenated bisphenol A-based polycarbonate (HBPA-PC) with a weight-average molecular weight (Mw) of 46,586 g/mol. Through a synergistic activation mechanism, this catalyst significantly reduced the activation energy of the polymerization reaction to 41.53 kJ/mol. The resulting polymer exhibited a decomposition temperature (Td5%) of 299.5 °C, a glass transition temperature (Tg) of 188 °C, and excellent optical properties (light transmittance as high as 91.03%). The findings of this study provide a new strategy for the preparation of high-performance, non-toxic polycarbonate materials, demonstrating great potential for applications in the fields of medical devices and food packaging.