论文部分内容阅读
有显著的“皮-芯”结构存在于微型注塑样品中,试样皮层逐渐变薄,是伴随着聚乙烯分子量的增加;通过WAXD及DSC测试发现,聚丙烯中β晶的含量逐渐降低,伴随着聚乙烯分子量的增加,且聚乙烯的加入可以显著将聚丙烯的起始结晶温度显著提升;通过对分子链取向的分析发现,聚丙烯分子链的取向程度的降低,伴随着聚乙烯分子量的增加。基于微型注塑成型条件下,文章对不同分子量的聚乙烯对聚丙烯结晶形态的影响进行探究。
A significant “skin-core” structure exists in the micro-injection molded samples, with the sample skin becoming thinner and accompanied by an increase in the molecular weight of the polyethylene. The WAXD and DSC tests showed that the content of β-crystal in polypropylene gradually decreased , With the increase of polyethylene molecular weight, and the addition of polyethylene can markedly increase the initial crystallization temperature of polypropylene; through the analysis of the molecular chain orientation, the degree of orientation of the polypropylene molecular chain decreases, accompanied by polyethylene Increase in molecular weight. Based on the micro-injection molding conditions, the paper explores the influence of different molecular weight polyethylene on the crystalline morphology of polypropylene.