【摘要】 采用熔融共混以及先混炼再熔融共混的方法制备了PP/纳米CaO3 及PP共聚物 (PPR) /SBS/纳米CaCO3 复合材料。通过SEM、TEM及力学性能测试研究了复合材料的力学性能及CaCO3 粒子的分散状况。结果表明 ,当CaCO3 粒子的质量分数分别为 4%和 8%时 ,两种共混体系的冲击强度达到最大值 ,分别为 5 18kJ/m2 和 5 9 14kJ/m2 ;CaCO3 粒子在体系中能够达到纳米级分散。复合材料的冲击断面观察证明材料的增韧是由于基体发生屈服所致更多还原

【Abstract】 sPP/CaCO 3 and PPR/SBS/CaCO 3 nano composite were prepared by melt blending.The composites mechanical properties and the dispersion of CaCO 3 were investigated by means of SEM?TEM and mechanical properties test.The results showed that the toughness of the composites reached up to their maximum:5 18 kJ/m 2 and 59 14 kJ/m 2 when the content of nano CaCO 3 was 4% and 8% separately.TEM showed that CaCO 3 was uniformly dispersed in the composites at a nanometer scale.Analysis of fractured surface proved that the toughening of the composites was due to the stress yielding of the matrix.更多还原