This article reports the effects of the characteristics and selective localization of nanofillers on the morphology development and rheological properties of melt‐processed polylactide/poly(butylene adipate‐co‐terephthalate) (PLA/PBAT) blend composites. Four types of nanofillers (1 wt%) are used: nanoclay (Cloisite30B [C30B]), carbon nanotubes (CNTs), nanosilica, and graphene oxide (GO). Transmission electron microscopy studies reveal that C30B is localized mainly at the PLA/PBAT interface, whereas silica, GO, and CNT are localized in PBAT droplets, although some CNTs also appear toward the interface inside the PBAT. Despite their selective localization inside the PBAT, CNTs are found to be the most effective particles for droplet size reduction, whereas silica nanoparticles are ineffective. The CNT bundles recoil during melt blending, and eventually, their breakage facilitates droplet breakup. The effects of nanofiller localization and annealing under dynamic shear on the blend morphologies are also explored through rheological analysis. The results show an anomalous relationship with the morphologies of the composites. It is also found that both coalescence and thermal degradation are involved in the annealing process of the blends. Interestingly, the CNT‐filled composites may have been transformed into co‐continuous‐like structures during annealing, unlike the other blends studied here.

中文翻译：

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纳米填料特性及其选择性定位对熔融加工的聚丙交酯/聚（己二酸丁二酯-对苯二甲酸对苯二甲酸酯）共混物形态发展和流变性能的影响

本文报道了纳米填料的特性和选择性定位对熔融加工的聚丙交酯/聚（己二酸丁二酯-对苯二甲酸对苯二酸酯）（PLA / PBAT）共混复合物的形态发展和流变性能的影响。使用四种类型的纳米填料（1 wt％）：纳米粘土（Cloisite30B [C30B]），碳纳米管（CNT），纳米二氧化硅和氧化石墨烯（GO）。透射电子显微镜研究表明，C30B主要位于PLA / PBAT界面，而二氧化硅，GO和CNT则位于PBAT液滴中，尽管一些CNT也朝着PBAT内部的界面出现。尽管它们在PBAT内选择性定位，但发现CNT是减小液滴尺寸最有效的颗粒，而二氧化硅纳米颗粒却无效。碳纳米管束在熔融共混过程中反冲，最终，它们的破裂会促进液滴的破裂。还通过流变分析探索了纳米填料的定位和动态剪切退火对共混物形态的影响。结果显示与复合材料的形态异常关系。还发现在共混物的退火过程中涉及聚结和热降解。有趣的是，与本文研究的其他共混物不同，碳纳米管填充的复合材料在退火过程中可能已转变为共连续结构。还发现在共混物的退火过程中涉及聚结和热降解。有趣的是，与本文研究的其他共混物不同，碳纳米管填充的复合材料在退火过程中可能已转变为共连续结构。还发现在共混物的退火过程中涉及聚结和热降解。有趣的是，与本文研究的其他共混物不同，碳纳米管填充的复合材料在退火过程中可能已转变为共连续结构。