文献类型：期刊文献

英文题名：Lewis acid-base pairs catalyzed synthesis of high molecular weight poly (propylene carbonate) from propylene oxide, CO2 and trace amounts of 4,4-Oxydiphthalic anhydride

作者：Zhao, Jiaqi[1];Wang, Jie[1];Yang, Xinyue[1];Shen, Weihua[1];Fang, Yunjin[1]

机构：[1]East China Univ Sci & Technol, Sch Chem Engn, State Key Lab Chem Engn & Low Carbon Technol, Shanghai 200237, Peoples R China

年份：2026

卷号：348

外文期刊名：POLYMER

收录：;EI(收录号：20260720088446);WOS:【SCI-EXPANDED(收录号:WOS:001693670400001)】；

语种：英文

外文关键词：Propylene oxide; Carbon dioxide; Poly(propylene carbonate); Metal-free catalysis; 4,4-Oxydiphthalic anhydride

摘要：Metal-free catalytic copolymerization of carbon dioxide (CO2) and propylene oxide (PO) has attracted considerable attention, yet poly(propylene carbonate) (PPC) obtained by one-pot metal-free routes often exhibits low molecular weight and limited thermal stability. Herein, we report an efficient strategy employing a Lewis acid-base pair catalyst, N,N-dimethylcyclohexylamine (DMCHA) and triethylborane (TEB), in combination with trace amounts of 4,4 '-oxydiphthalic anhydride (ODPA) to synthesize high-molecular-weight PPC. ODPA markedly accelerates terpolymerization and enhances polymer thermal performance. Under optimal conditions (DMCHA/TEB/PO = 1/2/2000, ODPA = 0.1 mol%), the resulting polymer achieved a number-average molecular weight (Mn) of 104 kg mol-1, a dispersity (& ETH;) of 1.53, and a catalytic productivity of 321 g polymer g-1 catalyst. Characterization by NMR, gel permeation chromatography, differential scanning calorimetry, and thermogravimetric analysis confirmed the superior structure and performance of the product. Moreover, this strategy was applicable to other tertiary amines and multifunctional anhydrides, demonstrating excellent versatility. The introduction of trace multifunctional anhydrides provides a promising approach for enhancing catalyst activity and developing high-performance CO2-based polycarbonates.