1,5-Pentanediol (PeDO) is a biobased but less studied diol monomer for polyester synthesis. As one of a series of studies on PeDO-derived polyesters, two aliphatic-aromatic copolyesters, poly(pentylene succinate-co-terephthalate) (PPeST) and poly(pentylene adipate-co-terephthalate) (PPeAT), were synthesized through melt copolycondensation of biobased PeDO, SA (or AA) and TPA. The chemical structure was characterized by ¹H NMR, and the thermo-mechanical properties were assessed by DSC, WAXD, TGA and tensile test. The ¹H NMR results demonstrated random structure and controllable copolymer composition. PPeATs showed two-stage thermal decomposition as the PeA units were clearly less stable than the PeT units at high temperature. In comparison, PPeSTs exhibited better thermal stability which was improved with increasing PeT unit content. Due to the difference in thermal stability, high intrinsic viscosity (0.78–1.4 dL/g) was facilely reached in synthesizing PPeSTs with melt copolycondensation, but medium intrinsic viscosity (0.58–0.66 dL/g) for PPeATs. Both kinds of copolyesters showed isodimorphism behavior and composition-dependent weak crystallizability. The PeT-rich copolyesters like PPeST₈₅ and PPeAT₈₅ showed reasonably good tensile properties because of higher crystallizability and stronger chain interaction.

1,5-戊二醇（PeDO）是一种生物基但研究较少的聚酯合成二醇单体。作为上PEDO衍生的聚酯的一系列研究中的一个，两个脂族-芳族共聚酯，聚（亚戊基琥珀酸盐助-terephthalate）（PPeST）和聚（亚戊基己二酸酯共-terephthalate）（PPeAT），是通过熔融聚合法制备合成生物基PeDO，SA（或AA）和TPA。通过¹ H NMR表征其化学结构，并通过DSC，WAXD，TGA和拉伸试验评估其热机械性能。在¹1 H NMR结果表明无规结构和可控的共聚物组成。PPeATs表现出两阶段热分解，因为在高温下PeA单元明显不如PeT单元稳定。相比之下，PPeSTs表现出更好的热稳定性，随着PeT单元含量的增加而提高。由于热稳定性的差异，在通过熔融共聚合成PPeST时，可以轻松达到高特性粘度（0.78–1.4 dL / g），而对于PPeAT，则具有中等特性粘度（0.58–0.66 dL / g）。两种共聚酯均表现出同构行为和依赖组分的弱结晶性。富含PeT的共聚酯，例如PPeST ₈₅和PPeAT ₈₅ 由于较高的结晶性和较强的链相互作用，因此显示出相当好的拉伸性能。