In this study, for the first time, we used cyclohexane dicarboxylic anhydride (CH) as the third monomer to terpolymerize with carbon dioxide (CO₂) and propylene oxide (PO) under the catalysis of zinc glutarate (ZnGA). Incorporating cis-CH (C-CH) and trans-CH (T-CH) into poly(propylene carbonate) (PPC) improved the thermal and mechanical properties and increased the polymer molecular weight and yield. T-CH showed better improvement than C-CH because of its twist-chair form. PPC-CH containing 3% T-CH exhibits the glass transition temperature (T_g) and maximum weight thermal decomposition temperature (T_max) at 38.6 and 263°C, respectively, and shows the Young's modulus and tensile strength about 2.9 GPa and 40.5 MPa, respectively, which has comparable mechanical properties to commercial poly(butylene succinate), polypropylene, and high-density polyethylene. PPC-CH may form a novel method to recover CO₂ in the form of polymers for various applications.

中文翻译：

---

具有改善的热性能和机械性能的二氧化碳、环己烷二甲酸酐和环氧丙烷的三元共聚物

在这项研究中，我们首次使用环己烷二甲酸酐（CH）作为第三单体，在戊二酸锌（ZnGA）的催化下与二氧化碳（CO ₂）和环氧丙烷（PO）进行三元聚合。将顺式-CH (C-CH) 和反式-CH (T-CH) 掺入聚（碳酸亚丙酯）(PPC) 中可以改善热性能和机械性能，并提高聚合物的分子量和产率。由于其扭椅形式，T-CH 比 C-CH 表现出更好的改进。含有 3% T-CH 的 PPC-CH 表现出玻璃化转变温度 ( T _g ) 和最大重量热分解温度 ( T _max) 分别在 38.6 和 263°C 下显示杨氏模量和拉伸强度分别约为 2.9 GPa 和 40.5 MPa，其机械性能可与商用聚（丁二酸丁二醇酯）、聚丙烯和高密度聚乙烯相媲美。PPC-CH 可以形成一种新方法，以用于各种应用的聚合物形式回收CO ₂。