Towards high-performance poly(L-lactide)/elastomer blends with tunable interfacial adhesion and matrix crystallization via constructing stereocomplex crystallites at the interface

摘要: In this work, we report a facile strategy to prepare super-tough and heat-resistant poly(L-lactide) (PLLA) blends by constructing stereocomplex (sc) crystallites with dual interfacial adhesion enhancer/matrix crystallization accelerator functionality at the interface of PLLA/ethylene copolymer. To exploit functionality, poly(D-lactide) grafted ethylene–acrylic ester copolymer (EMA-g-PDLA) capable collaborating PLLA matrix form sc was first prepared via melt coupling reaction between end groups (carboxyl hydroxyl) PDLA excess epoxy group EMA–glycidyl methacrylate (EMA–GMA). During subsequent melt-blending EMA-g-PDLA, are formed interface. The results show that, compared PLLA/EMA–GMA PLLA/EMA-g-PLLA blends, injection molded PLLA/EMA-g-PDLA have much higher impact toughness heat resistance because interface-localized can induce substantial enhancement in both crystallinity. More interestingly, modulating amount optimum be achieved due optimization strength This work provides new concept for fabrication high-performance tailoring properties aid crystallites.