In this study, iso-sorbitol type polycarbonate (PIC) was synthesized with isosorbide (ISB) and diphenyl carbonate (DPC) as reactive monomers. The flexible co-monomers 1,4-butanediol (BDO) and 1,4-cyclohexane dimethanol (CHDM) were introduced to improve its property. Then, two iso-sorbitol type polycarbonate copolymers were obtained: Isosorbitol type polycarbonate copolymer (PIBC) containing 1,4-butanediol (BDO) and isosorbitol type polycarbonate copolymer (PICC) containing 1,4-cyclohexane dimethanol (CHDM). The results of ¹H-NMR and FT-IR demonstrated that the structures of PC, PIC, PIBC, and PICC synthesized by the experiment were consistent with the theoretical structures. The results of the characteristic viscosity test suggested that the copolymer with high relative molecular weight was successfully prepared. The results of DSC and TGA revealed that the introduction of a flexible copolymer increased the relative molecular weight of the copolymer, decreased the glass transition temperature, and exerted little effect on the thermal stability of the copolymer. The mechanical properties test results unveiled that PICC has good mechanical properties. Owing to its excellent mechanical and thermal properties, there is a broad application prospect of the PICC as a green polycarbonate material.

在这项研究中，以异山梨醇 (ISB) 和碳酸二苯酯 (DPC) 作为反应单体合成了异山梨糖醇型聚碳酸酯 (PIC)。引入柔性共聚单体 1,4-丁二醇 (BDO) 和 1,4-环己烷二甲醇 (CHDM) 以改善其性能。然后，获得两种异山梨醇型聚碳酸酯共聚物：含有1,4-丁二醇(BDO)的异山梨醇型聚碳酸酯共聚物(PIBC)和含有1,4-环己烷二甲醇(CHDM)的异山梨醇型聚碳酸酯共聚物(PICC)。结果¹H-NMR和FT-IR表明实验合成的PC、PIC、PIBC和PICC的结构与理论结构一致。特性粘度测试结果表明，成功制备了高相对分子量的共聚物。DSC和TGA结果表明，柔性共聚物的引入提高了共聚物的相对分子量，降低了玻璃化转变温度，对共聚物的热稳定性影响不大。力学性能测试结果表明PICC具有良好的力学性能。由于其优异的力学性能和热性能，PICC作为绿色聚碳酸酯材料具有广阔的应用前景。