聚丙烯材料分子量及其分布对结晶形态的影响

The Effect of Molecular Weight and Its Distribution of Crystalline Morphology of PP Materials

研究不同分子量及分布下聚丙烯材料结晶形态的变化规律,结果表明:用分子量分布宽度MWD这一参量来描述不同分子量及其分布下材料结晶形态的变化规律更为恰当。分子量的多分散性意味着高、低分子量组分之间存在明显的相互作用,决定了聚丙烯材料最终的结晶形态。

The change rule of crystalline morphology of PP with different molecular weight and molecular weight distribution was researched. It was suitable to described the change rule of crystalline morphology under different molecular weight and its distribution with the parameter of molecular weight distribution （MWD）. The dispersion of molecular weight showed that the obvious mutual effect existed between the high and low molecular weight, it would determine the final crystalline morphology of PP materials.