ABSTRACT This study prepared polylactic acid (PLA)/bio‐based nylon 11 (PA11) blends and reactive compatibilized PLA/PA11 composites using PA11 as the toughening agent and a chain extender (Joncryl ADR‐4468) as the compatibilizer. First, the microstructure of the PLA/PA11 blends was analyzed to investigate the morphological changes under varying component ratios and ADR concentrations. Subsequently, the effects of ADR on the crystallization behavior, thermal stability, and mechanical properties of PLA/PA11 blends were examined. The compatibilization and toughening mechanisms of the reactive compatibilized PLA/PA11 blends were also studied. The incorporation of ADR as a compatibilizer not only successfully enhanced the interfacial compatibility between PLA and PA11 but also significantly improved the mechanical properties and thermal stability of the reactive compatibilized PLA/PA11 blends. During the investigation of the compatibilization mechanism in reactive compatibilized PLA/PA11 blends, it was discovered that the epoxy groups of ADR reacted in situ with PLA and PA11 to form PLA‐g‐PA11 copolymers. This reaction improved the interfacial compatibility between PLA and PA11 and enhanced the interfacial forces. This provides theoretical support and a pathway for preparing high‐performance PLA‐based materials while also offering new possibilities for future toughening modifications of PLA‐based materials.
Wen et al. (Thu,) studied this question.
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