机构地区: 郑州大学材料科学与工程学院
出 处: 《现代塑料加工应用》 2013年第3期39-42,共4页
摘 要: 通过拉伸性能测试,考察了稀土类β成核剂和熔体温度对等规聚丙烯(iPP)注塑试样断裂韧性的影响,并用二维广角X射线衍射法(2D-WAXD)和差示扫描量热法(DSC)对它们的微观结构进行了研究。结果表明:纯iPP和加入β成核剂的iPP试样的断裂韧性随着熔体温度的升高而增加;稀土β成核剂因其具有较强的异相成核作用,从而使材料的断裂韧性得到较大提高。 The effects of rare earth β nucleating agent and molten temperature on the fracture toughness of iPP was directed attention towards by the measurement of tensile property. The microstructure of the samples was performed by 2D-WAXD and DSC metheds. The results indicate that the fracture toughness of neat iPP and β-nucleated iPP increases dramatically with the increase of the molten temperature. The fracture toughness of iPP products is improved by the rare earth β nucleating agent which has strong heterogeneous nucleation effect.
关 键 词: 等规聚丙烯 熔体温度 成核剂 微观结构 断裂韧性
领 域: [化学工程]