PP/POE共混体系脆韧转变的定量研究

Quantitative Investigation on the Brittle-Ductile Transition of PP/POE Blend

研究了乙烯-1-辛烯共聚物(POE)对两种不同型号的聚丙烯(PP)的增韧情况。结果显示,对不同性质的基体PP,出现脆韧转变所需的弹性体POE含量不同;根据逾渗模型,应用不同的计算公式,定量地求得了两种PP/POE体系分别出现脆韧转变时的临界基体层厚度Tc。

The toughening effects of Metallocene Ethylene-1-Octene Copolymer （POE） on two different types of Polypropylene（PP） were investigated. It is shown that, for different PP matrices, the POE content is different in order to reach the Brittle-Ductile Transition（BDT）. According to the percolation model and various calculation equations, the Critical Matrix Ligament Thickness （Tc） of two PP/POE blends were calculated quantitatively.