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<p>Polybutylene carbonate (PBC),&#xa0;an aliphatic polyester synthesized via copolymerization of dimethyl carbonate(DMC) and 1,4-butanediol (BD),&#xa0;emerges as a sustainable biodegradable polymer, offering distinct advantages over conventional petroleum-based plastics. Dimethyl carbonate, a CO<sub>2</sub>-derived green carbonylating agent, serves as a sustainable and eco-efficient precursor for synthesizing PBC through melt polycondensation. By employing sodium acetate as a catalyst and optimizing parameters such as the DMC/BD feed ratio, pre-polymerization temperature, catalyst concentration, and polycondensation temperature, the synthesized PBC can achieve a weight-average molecular weight (Mw) of approximately 310000&#xa0;g/mol. This study investigates the thermal property, mechanical property, crystallization, hydrophilicity and biodegradability of PBC across a controlled Mw range (120000–280000&#xa0;g/mol). PBC possessing a molecular weight of 280000&#xa0;g/mol exhibits a tensile strength of 42.3 ± 3.5&#xa0;MPa and an elongation at break of 420 ± 13%. The thermal decomposition and enzymatic degradation rates of PBC are critically governed by its end group chemistry.</p>

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Synthesis and characterization of high molecular weight poly(butylene carbonate) from dimethyl carbonate

  • 期刊论文

  • 发表日期：

    2025年7月15日

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  • Jie Liao,
  • Shihao Sun,
  • Mingliang Wang,
  • Jianguo Li,
  • Ziqing Wang,
  • Gongying Wang,
  • Wei Bai

摘要

Polybutylene carbonate (PBC), an aliphatic polyester synthesized via copolymerization of dimethyl carbonate(DMC) and 1,4-butanediol (BD), emerges as a sustainable biodegradable polymer, offering distinct advantages over conventional petroleum-based plastics. Dimethyl carbonate, a CO2-derived green carbonylating agent, serves as a sustainable and eco-efficient precursor for synthesizing PBC through melt polycondensation. By employing sodium acetate as a catalyst and optimizing parameters such as the DMC/BD feed ratio, pre-polymerization temperature, catalyst concentration, and polycondensation temperature, the synthesized PBC can achieve a weight-average molecular weight (Mw) of approximately 310000 g/mol. This study investigates the thermal property, mechanical property, crystallization, hydrophilicity and biodegradability of PBC across a controlled Mw range (120000–280000 g/mol). PBC possessing a molecular weight of 280000 g/mol exhibits a tensile strength of 42.3 ± 3.5 MPa and an elongation at break of 420 ± 13%. The thermal decomposition and enzymatic degradation rates of PBC are critically governed by its end group chemistry.