无机填料对高密度聚乙烯氧化诱导期的影响

Influence of Inorganic Fillers on Oxidation Induction Time of High Density Polyethylene

摘要: 分别用碳酸钙和两种不同晶型的二氧化钛为填料与高密度聚乙烯制备了复合材料，通过DSC测试以及实验室加速老化试验，研究了不同无机填料对高密度聚乙烯氧化诱导期(OIT)的影响以及不同无机填料对瓶盖老化性能的影响，结果表明碳酸钙与锐钛矿型二氧化钛均使高密度聚乙烯氧化诱导期降低，而金红石型二氧化钛在含量低于1.08%时使高密度聚乙烯氧化诱导期升高。无机填料的加入使高密度聚乙烯的氧化诱导期降低，同时也使其抗老化性能降低。

Abstract: The composites were prepared by using calcium carbonate and two different crystal forms of tita-nium dioxide with high density polyethylene respectively. The influences of different inorganic fillers on the oxidation induction time (OIT) of high density polyethylene (HDPE) and the aging properties of the caps were studied by DSC test and accelerated aging experiments in laboratory. The results showed that both the calcium carbonate and anatase titanium dioxide decreased the oxidation induction time of HDPE, whereas the rutile titanium dioxide increased the oxidation in-duction time of HDPE when the content was less than 1.08%. The additional of inorganic fillers re-duces the oxidation induction time of HDPE and at the same time weakens its anti-aging properties.