Ảnh hưởng của chất biến tính tro bay đến tính chất và hình thái cấu trúc của vật liệu tổ hợp LDPE/EVA/tro bay

The fly ash from Pha Lai power plant was modified by three types of silane coupling agent (SCA). The thermal oxidation stability of the composites was determined by thermal gravimetric analysis (TGA). The morphology of modified fly ash and LDPE/EVA/FA composites was analyzed by scanning electron microscopy (SEM). Besides, the mechanical properties of LDPE/EVA/FA composites were also studied. The obtained results indicated the thermal oxidation stability of LDPE/EVA/SCA modified FA composites was higher than that of LDPE/EVA/FA composites and LDPE/EVA blend. Tensile strength and elongation at break of LDPE/EVA/SCA modified FA composites are higher than those of LDPE/EVA/FA composites. The LDPE/EVA/FA-VTMS (2 %) composite had the best thermal oxidation stability and mechanical properties. The SEM images showed that SCA modified FA dispersed more regularly in polymer matrix.