文献类型：期刊文献

英文题名：Overcoming limitations in ring-opening copolymerization: low-temperature, high-efficiency, and scalable synthesis of poly (propylene carbonate) from CO2 via Cs2CO3/triethylboron catalysis

作者：Haq, Ijaz Ul[1];Ali, Nawab[2];Shen, Weihua[1];Fang, Yunjin[1]

机构：[1]East China Univ Sci & Technol, Sch Chem Engn, State Key Lab Chem Engn, Shanghai, Peoples R China;[2]East China Univ Sci & Technol, Shanghai Key Lab Funct Mat Chem, Shanghai, Peoples R China

年份：2026

外文期刊名：CHEMICAL ENGINEERING COMMUNICATIONS

收录：;EI(收录号：20260720091304);WOS:【SCI-EXPANDED(收录号:WOS:001690148200001)】；

基金：This work is supported by Zhejiang Zheneng Technology & Environment Group Co., Ltd. China under Grant [KH-KJ-24-004-W001].

语种：英文

外文关键词：Carbon dioxide; cesium carbonate; copolymerization; polymerization; polypropylene carbonate; propylene carbonate

摘要：The sustainable synthesis of poly (propylene carbonate) (PPC) from CO2 and propylene oxide (PO) was investigated using a combined computational and experimental approach under cesium carbonate/triethylboron (Cs2CO3/Et3B) catalysis. Conventional high-temperature (40-80 degrees C) ring-opening copolymerization (ROCOP) typically suffers from low selectivity, limited CO2 incorporation, broad dispersity (& Dstrok;), and reduced average molecular weights (Mn). In contrast, the (Cs2CO3/Et3B) catalyst system demonstrated significantly improved performance at lower temperatures, enabling efficient PPC formation. Furthermore, the incorporation of the phase-transfer catalyst tetrabutylammonium bromide (TBAB) enhanced CO2 solubility in PO, thereby increasing copolymerization efficiency. Temperature played a critical role in dictating reactivity: at 35 degrees C, the [(Cs2CO3/TBAB) Et3B] system outperformed (Cs2CO3/Et3B) alone, yielding higher selectivity, increased Mn, and narrower & Dstrok;. At 70 degrees C, however, the reaction shifted entirely toward the entropically favored backbiting cyclization, resulting in >99% propylene carbonate (PC). Overall, computational and experimental studies establish the [(Cs2CO3/TBAB) Et3B] catalyst system as a highly active and versatile platform for efficient and tunable ROCOP.