Poly(ethylene-co-1,4-cyclohexanedimethylene 2,5-furandicarboxylate) (PECF), with different contents of trans- or cis-CHDM isomers, was synthesized to investigate the influence of CHDM configuration on its properties. Before properties investigation, their chemical structures, composition and molecular weight as well as molecular weight distribution were determined by nuclear magnetic resonance (NMR) and gel permeation chromatography (GPC). Their thermal and dynamic mechanical properties as well as barrier properties were measured by differential scanning calorimeter (DSC), thermogravimetric analyzer (TGA), dynamic mechanical analysis (DMA) and gas permeability tester. Results showed that the PECFs could be changed from amorphous polyester (PECF-trans 25) to highly crystalline polyester (PECF-trans 98) by increasing the content of trans-CHDM from 25% to 98%. The melting temperature of PECF-trans 98 was as high as 252 °C and its crystallization half-time was only 15 s. Besides the tensile modulus and strength, the O₂ and CO₂ barrier property of PECFs were all increased with the increasing content of trans-CHDM. When the content of trans-CHDM was higher than 55%, PECFs showed excellent gas barrier properties, which was better or comparable to those of PEN and PEI.

聚（乙烯-共-1,4-环己烷二亚甲基-2,5-呋喃二羧酸酯）（PECF）中，用不同含量的反式-或顺式合成了-CHDM异构体，以研究CHDM构型对其性能的影响。在性质研究之前，通过核磁共振（NMR）和凝胶渗透色谱法（GPC）确定它们的化学结构，组成和分子量以及分子量分布。通过差示扫描量热仪（DSC），热重分析仪（TGA），动态力学分析（DMA）和气体渗透率测试仪测量了它们的热力学和动态力学性能以及阻隔性能。结果表明，通过增加反式含量，可将PECF从无定形聚酯（PECF-trans 25）转变为高结晶性聚酯（PECF-trans 98）。-CHDM从25％升至98％。PECF-trans 98的熔融温度高达252°C，其结晶半衰期仅为15 s。除拉伸模量和强度外，PECF的O ₂和CO ₂阻隔性能均随着反式-CHDM含量的增加而增加。当反式-CHDM的含量高于55％时，PECF表现出优异的阻气性，与PEN和PEI相比更好或相当。