文献类型：期刊文献

英文题名：The effect of using the two-step extrusion method on the oxidation induction time value of recycled high density polyethylene

作者：Li, Yan[1];Xu, Haiyan[1];Wu, Chifei[1]

机构：[1]E China Univ Sci & Technol, Sch Mat Sci & Engn, Polymer Alloy Res Lab, Shanghai 200237, Peoples R China

年份：2012

卷号：44

期号：5

起止页码：421

外文期刊名：POLYMER JOURNAL

收录：;EI(收录号：20122015020537);WOS:【SCI-EXPANDED(收录号:WOS:000303624700009)】；

语种：英文

外文关键词：oxidative induction time (OIT); reactive extrusion; recycled HOPE; two-step extrusion method

摘要：The two-step extrusion method was used to manufacture pipe-grade high density polyethylene (HDPE) material from recycled HDPE. With the two-step extrusion method, dicumyl peroxide (DCP) can completely react after reactive extrusion without adding antioxidants in the first step, which increased the degree of cross-linking and the molecular weight of the recycled HDPE. Then, adding the antioxidant in the second extrusion step can avoid the conflict between the two additives. As a result, this method improved the oxidation induction time (OIT) and the environmental stress cracking resistance (ESCR) value of HOPE compared with the traditional one-step extrusion method. For both Irganox 1035 and Irganox 300, the OIT using the two-step extrusion method is much higher than that using the one-step method. In addition, introducing carbon black (CB) into the black masterbatch affected the OIT. When the CB content was 0.8%, the OIT was at its maximum value. Polymer Journal (2012) 44, 421-426; doi:10.1038/pj.2012.9; published online 7 March 2012