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Investigation on Polylactide (PLA)/Poly(butylene adipate-co-terephthalate) (PBAT)/Bark Flour of Plane Tree (PF) Eco-Composites

机译:平面树(PF)生态复合材料的聚丙交酯(PLA)/聚己二酸丁二酯-聚对苯二甲酸丁二酯(PBAT)/皮面粉的研究

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摘要

Polylactide (PLA)/poly(butylene adipate-co-terephthalate) (PBAT)/bark flour of plane tree (PF) eco-composites were prepared via melt blending. The morphologies, mechanical properties, crystal structures and melting and crystallization behaviors of the eco-composites were investigated by means of scanning electron microscopy (SEM), mechanical tests, polarized light microscopy (PLM), wide angle X-ray diffraction (WAXD) and differential scanning calorimetry (DSC), respectively. It is shown that the interfacial adhesion between PLA matrix and PF is weak and the mechanical properties of PLA/PF eco-composites are poor. The titanate treatment improves the adhesion between the matrix and the filler and enhances the stiffness of the eco-composites. The toughness is improved by PBAT and ductile fractured surfaces can be found. The spherulitic size of PLA is decreased by the addition of PF. The α crystalline form of PLA remains in the composites. Compared with PF, T-PF (PF treated by a titanate coupling agent) and PBAT have negative effects on the crystallization of PLA.
机译:通过熔融共混制备了平面树(PF)生态复合材料的聚丙交酯(PLA)/聚己二酸对苯二甲酸丁二醇酯(PBAT)/树皮粉。通过扫描电子显微镜(SEM),力学性能测试,偏光显微镜(PLM),广角X射线衍射(WAXD)和红外光谱等方法研究了生态复合材料的形貌,力学性能,晶体结构以及熔融和结晶行为。差示扫描量热法(DSC)。结果表明,PLA基体与PF之间的界面附着力较弱,PLA / PF生态复合材料的力学性能较差。钛酸酯处理改善了基体与填料之间的粘附力,并增强了生态复合材料的刚度。通过PBAT可以提高韧性,并且可以发现韧性断裂表面。通过添加PF可以减小PLA的球尺寸。 PLA的α晶型保留在复合材料中。与PF相比,T-PF(用钛酸酯偶联剂处理的PF)和PBAT对PLA的结晶有不利影响。

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