In this paper, a series of fully biobased poly(1,4-cyclohexanedimethanol-co-isosorbide 2,5-furandicarboxylate)s (PCIsFs) copolyesters have been synthesized from dimethyl-2,5-furandicarboxylate (DMFD), isosorbide (IS) and 1,4-cyclohexanedimethanol (CHDM) by melt polycondensation. The structure of prepared polymers was characterized by ¹H-NMR and FTIR spectroscopies. Differential scanning calorimetry (DSC) results indicated that the crystallizability and melting temperature (T_m) of PCIsFs can be controlled with the increasing content of isosorbide furanoate units into the copolyesters structure, whereas their glass transition temperatures (T_g) showed a beneficial increase ranging from 76.8 °C to 103.5 °C. Wide-Angle X-ray Diffractometry (WAXD) patterns revealed that a small portion of isosorbide units are inserted into the crystals of PCHDMF, resulting in increase of the interplanar distances and crystal defects. A banded spherulitic morphology was observed, while coarsening of spherulites and increase in band distance occurred with increasing isosorbide content. Thermogravimetric analysis (TGA) results showed an excellent thermal stability up to 360 °C for all copolymers.

本文从2,5-呋喃二甲酸二甲酯（DMFD），异山梨醇（IS）合成了一系列全生物基聚（1,4-环己烷二甲醇-共异山梨醇2,5-呋喃二甲酸）（PCIsFs）共聚酯。和1,4-环己烷二甲醇（CHDM）通过熔融缩聚反应。制备的聚合物的结构通过¹ H-NMR和FTIR光谱学表征。差示扫描量热法（DSC）结果表明，可通过增加呋喃异氰酸酯单元进入共聚酯结构的含量来控制PCIsFs的结晶性和熔融温度（T _m），而它们的玻璃化转变温度（T _g）显示出有利的升高幅度，从76.8°C到103.5°C。广角X射线衍射（WAXD）模式显示，一小部分异山梨醇单元插入PCHDMF晶体中，导致晶面间距和晶体缺陷的增加。观察到带状球晶形态，同时随着异山梨醇含量的增加，球晶变粗和带距增加。热重分析（TGA）结果表明，所有共聚物在高达360°C的温度下均具有出色的热稳定性。