Impact modifier particles with the core-shell structure in the polypropylene (PP) matrix were successfully prepared in situ by melt blending PP, thermoplastic starch acetate (TPAS) and poly(ethylene octane) grafted with maleic anhydride (POE-MA). It was found that the core was formed by TPAS, while the shell was formed by POE-MA. This core-shell particle plays an important role in toughening PP. The notched impact strength of PP/TPAS/POE-MA blend was as high as 68.1 KJ/m² with an anticipated cost effectiveness. The mechanism of formation of the core-shell starch-based particles could be ascribed to the reactive compatibilization between TPAS and POE-MA which could be confirmed by SEM, and which dramatically improved the mechanical properties of the composites. This provides a new idea for the toughening modification of nonpolar PP, which could widely extend the application of starch and lower the cost.

通过熔融共混聚丙烯，热塑性淀粉醋酸酯（TPAS）和接枝马来酸酐（POE-MA）的聚乙烯辛烷，成功地在聚丙烯（PP）基质中制备了具有核-壳结构的抗冲改性剂颗粒。发现核是由TPAS形成的，而壳是由POE-MA形成的。该核-壳颗粒在增韧PP中起重要作用。PP / TPAS / POE-MA共混物的缺口冲击强度高达68.1 KJ / m ²具有预期的成本效益。核-壳淀粉基颗粒的形成机理可以归因于TPAS和POE-MA之间的反应相容性，这可以通过SEM证实，并且可以显着提高复合材料的机械性能。这为非极性PP的增韧改性提供了新思路，可以广泛推广淀粉的应用，降低成本。