To fulfilled the challenges regarding environmentally friendly upcoming application, the development of sustainable high-performance blends which are biodegradable due to the use of 100 % bio-based renewable polymer materials is a promising strategy. Therefore it is reasonable to employ a sustainable electron beam treatment instead of temperature sensitive chemical initiators. Polylactide (PLA) [1] is known as one of the most important bio-based polymers due to its excellent biocompatibility and sufficient tensile strength. However, the commercially available PLA is typical inherent brittle, restricting its use in large-scale applications, such as thermoforming, foaming, and blow molding. To improve the toughness of PLA it was blended with polycaprolactone (PCL) [2] or natural rubber (NR) [3] using the electron-induced reactive processing (EIReP). EIReP uses the spatial and temporal tuneable energy input by high energy electrons during the melt mixing process in order to control the desired chemical reactions. Through the process-induced polymer chain radicals, branching reactions between PLA chain and PCL or either NR polymer chain will be initiated, hence an in-situ compatibilization of the blend interphase can be achieved. Due to the fundamental understanding of structure-morphology-property relationships of electron modified PLA blends an increased toughening was obtained. Moreover, an electron-induced crystallization during polymer melt cooling, instead of the typical cold crystallization process, can be obtained. References: [1] Huang, Y. et al. Radiation Physics and Chemistry 2019, 159, 166-173 [2] Huang, Y. et al. J. of applied polymer science 2019, DOI: 10.1002/APP.47866 [3] Huang, Y. et al. Polymers 2019, 11, 1279; doi:10.3390/polym11081279