A series of thermoplastic polyester elastomer (TPEE) derivatives based on recycled polyethylene terephthalate (r-PET) and poly(tetramethylene glycol) together with differing amounts (n%, n = 0, 1, 3, and 5) of 1,6-hexanediamine (HDA) were prepared. Blending of the copolymer with a rod-like liquid crystal (4-cyano-3-fluorophenyl 4-ethylbenzoate (4CFE)), named TPEEn%-4CFE, was studied. Among them, the TPEE3%-4CFE mixture featured optimal blending, with liquid crystals well-connected with the HDA moieties in the TPEE framework through hydrogen-bonding interaction, according to X-ray and Fourier-transform infrared spectroscopy analyses. A packing diagram is proposed to illustrate the unique performance of TPEE3%-4CFE, attributed to the enhancement of π–π interactions. The polarized mesophase and morphology indicated favorable dispersion of liquid crystals in the TPEE matrix in TPEE3%-4CFE, which was applied successfully in electrochemical sensing for ascorbic acid for the first time. The TPEE3%-4CFE-modified carbon paste electrode sensor is a rapid-response sensor with high sensitivity of approximately 11.30 μA mM⁻¹, a wide linear dynamic range of 0.181.26 μM, and a limit of detection of 0.4 mM–1.6 mM.

一系列基于回收的聚对苯二甲酸乙二醇酯 ( r- PET) 和聚（丁二醇）的热塑性聚酯弹性体 (TPEE) 衍生物以及不同量（n%，n = 0、1、3 和 5）的 1,6-制备己二胺（HDA）。研究了共聚物与棒状液晶（4-氰基-3-氟苯基4-乙基苯甲酸酯（4CFE））的共混，命名为TPEEn%-4CFE。其中，根据 X 射线和傅立叶变换红外光谱分析，TPEE3%-4CFE混合物具有最佳混合特征，液晶通过氢键相互作用与 TPEE 框架中的 HDA 部分良好连接。提出包装图来说明TPEE3%-4CFE的独特性能，归因于π – π相互作用的增强。极化的中间相和形貌表明液晶在TPEE3%-4CFE中的 TPEE 基质中具有良好的分散性，首次成功应用于抗坏血酸的电化学传感。所述TPEE3％-4CFE改性碳糊电极传感器是一个快速响应传感器具有大约11.30的高灵敏度 μ一个MM ^-1，宽线性动态范围的0.181.26  μ M，并且检测的0.4的极限MM- 1.6 毫米。