The aim of this study was to prepare a new blend system by blending equimolar poly(L-lactic acid) (PLLA) and poly(D-lactide acid) (PDLA) with poly(butylene adipate-co-terephthalate) (PBAT) and to form stereocomplex polylactide (sc-PLA) during blending process. Then, sc-PLA would improve the performance of PBAT without compromising its biodegradability. Torque-time curve, differential scanning calorimetry (DSC), and wide angle X-ray diffraction (WAXD) measurements indicated that only sc-PLA formed in PBAT matrix. The phase morphology showed that sc-PLA particles were uniformly dispersed in PBAT matrix, and the sizes were independent of their contents. The rheological properties of PBAT were significantly enhanced by addition of sc-PLA, especially after the formation of a percolation network structure. With the increase of sc-PLA content, the blends displayed increased yield strength and modulus and decreased elongation at break and tensile strength. The sc-PLA particles could reinforce PBAT matrix. Compared with pure PBAT, the heat resistance of PBAT/sc-PLA blends was improved. Graphical abstract Graphical abstract

中文翻译：

---

聚（己二酸丁二醇酯-共对苯二甲酸酯）和立体络合物聚丙交酯的可生物降解混合物，具有增强的流变学、机械性能和耐热性

本研究的目的是通过将等摩尔聚（L-乳酸）（PLLA）和聚（D-丙交酸）（PDLA）与聚（己二酸丁二酯-共聚对苯二甲酸酯）（PBAT）和在共混过程中形成立体络合物聚丙交酯（sc-PLA）。然后，sc-PLA 将在不影响其生物降解性的情况下提高 PBAT 的性能。扭矩-时间曲线、差示扫描量热法 (DSC) 和广角 X 射线衍射 (WAXD) 测量表明，在 PBAT 基质中仅形成了 sc-PLA。相形态表明sc-PLA颗粒均匀地分散在PBAT基体中，尺寸与其含量无关。添加 sc-PLA 显着增强了 PBAT 的流变特性，尤其是在形成渗透网络结构之后。随着 sc-PLA 含量的增加，共混物的屈服强度和模量增加，断裂伸长率和拉伸强度降低。sc-PLA 颗粒可以增强 PBAT 基质。与纯PBAT相比，PBAT/sc-PLA共混物的耐热性有所提高。图形摘要图形摘要