The flexural strength was determined using an ASTM D790 standard on universal testing equipment (R&B Unitech, Korea) with a load cell of 50 kN. The specimens were sliced to a width of 12.7 mm with a span length of 16 times the thickness of the specimen, and the crosshead speed was kept constant at 1 mm/min. The sample cutting machine used here was manufactured by Korean Composites Application (KCA) with model number BK1500. The impact test was performed according to ASTM D256 standards using an Izod impact testing machine (model QC-639 °F, Cometech, Korea) with a capacity of 22 joules.