【摘要】 制备了三种反应性单体和两种PP接枝物改性的PP／PS共混物,用DSC研究了改性PP／PS共混 物的结晶与熔融行为。结果表明:PS的加入提高了PP的结晶温度,两种接枝物的加入进一步提高共混物中 PP的结晶温度,少量反应性单体对结晶温度影响不大,但高用量时则明显提高共混物的结晶温度;外加接枝 物或者反应性单体对共混物中PP的熔融温度影响不大,但是熔融峰形与结晶温度高低有关。更多还原

【Abstract】 PP/PS blends modified by grafted PP and reactive monomer were prepared by twin screw extruder. The crystallization and melt behavior of modified blends were investigated by DSC. Three reactive monomers, AA- g-PP and MA- g -PP were used as modifying agent. The results indicated that addition of PS increased the crystallization temperature of PP. AA- g -PP and MA- g -PP further increased the crystallization temperature of PP in its blends. Although reactive monomer at low content slightly aecreased the crystallization temperature of PP in the blends, the addition of styrene at high content increased the crystallization temperature of PP. All blends show no remarkable variety in melt temperature, but the shapes of melt peak is influenced by crystallization temperature.更多还原