Abstract In this work, binary poly (lactic acid) (PLA)/nanoclay (NC), PLA/nano calcium carbonate (NCC) nanocomposites and ternary PLA/NC/NCC samples were prepared via melt mixing. The morphology, rheology, crystallinity and mechanical properties of neat PLA and prepared nanocomposites were studied. The results of the X-ray diffraction (XRD) showed an increase in distance between NC platelets in both binary and hybrid samples, indicating the intercalation of NC particles. It was found that in the hybrid samples, the increase in the distance between platelets was greater than the binary one. The rheological studies showed an increase in the storage modulus of samples at low frequencies in comparison to neat polymer. The tensile test showed an enhancement of modulus and tensile strength of all nanocomposite samples. The highest tensile strength was found in the hybrid sample containing 3 wt.% of NC and 7 wt.% of NCC which was 37% higher than neat PLA. Moreover, the results of differential scanning calorimetry (DSC) showed that the crystalline temperature of hybrid sample containing 3 wt.% of NC and 7 wt.% of NCC was about 8 °C higher than that of the neat PLA, which could be due to the increase in the rate of crystallinity.

中文翻译：

---

纳米粘土和纳米碳酸钙对PLA基二元和三元纳米复合材料形貌、流变学、结晶度和力学性能的影响研究

摘要 在这项工作中，通过熔融混合制备了二元聚乳酸（PLA）/纳米粘土（NC）、PLA/纳米碳酸钙（NCC）纳米复合材料和三元 PLA/NC/NCC 样品。研究了纯 PLA 和制备的纳米复合材料的形态、流变学、结晶度和机械性能。X 射线衍射 (XRD) 的结果显示二元和混合样品中 NC 片晶之间的距离增加，表明 NC 颗粒的嵌入。发现在混合样品中，血小板之间距离的增加大于二元的。流变学研究表明，与纯聚合物相比，样品在低频下的储能模量有所增加。拉伸试验表明所有纳米复合材料样品的模量和拉伸强度都有所提高。在含有 3 wt.% NC 和 7 wt.% NCC 的混合样品中发现最高拉伸强度，比纯 PLA 高 37%。此外，差示扫描量热法 (DSC) 的结果表明，含有 3 wt.% NC 和 7 wt.% NCC 的混合样品的结晶温度比纯 PLA 的结晶温度高约 8°C，这可能是由于以提高结晶度。