光交联聚乙烯表面氧化的光电子能谱研究  

XPS Studies on the Surface Oxidation of Photo Crosslinked Polyethylene

作　　者：徐云华[1,2] 施文芳[1,2] 李雯[1,2] 孙树森[1,2] 瞿保钧[1,2] 

机构地区：[1]中国科学技术大学 [2]火灾科学国家重点实验室

出　　处：《Chinese Journal of Chemical Physics》1998年第2期161-165,共5页化学物理学报（英文）

摘　　要：利用光电子能谱（ＸＰＳ）技术研究了聚乙烯紫外光引发交联过程中聚乙烯的表面光氧化以及光交联聚乙烯的热氧化，探讨了适合于光交联聚乙烯（ＸＬＰＥ）材料的抗氧化体系，并讨论了该体系抗氧化的机理。结果表明，在氮气氛下，光交联过程中聚乙烯表面发生了光氧化，其氧化程度随光照时间的增加而增加。对光照时间较短的ＸＬＰＥ，其热氧化的主要产物为－ＣＨ２Ｏ－、Ｃ＝Ｏ以及过氧化物等；对光照时间较长的ＸＬＰＥ，其热氧化产物中－ＣＯＯＲ和－ＣＯＯＨ成分则明显增多。酚类与亚磷酸酯类抗氧剂联合使用能有效提高ＸＬＰＥ的抗氧化性能。The surface oxidation of photo crosslinked polyethylene(XLPE)was studied by X-ray photoelectron spectroscopy(XPS).The XPS analyses show that during the photo crosslinking,the polyethylene surface has been oxidized when it was UV-irradiated in the melt in nitrogen,and the oxidation of XLPE becomes more serious when the UV-irradiation time is longer.In the other hand,oven aging can also cause oxidizing of XLPE.After the XLPE samples were aged at 135℃ for 168h in the oven,the main oxidation products are -CH 2O-,C=O and hyperoxide for the samples UV-irradiated for shorter time,however the contents of oxidation products -COOR and -COOH increase obviously for the samples UV-irradiated for longer time.In addition,efficient antioxidants for XLPE and their antioxidation mechanisms were also investigated.The resluts show that phenol and phosphite ester have good synergism and their combination can significantly improve the antioxidant rpoperty of XLPE materials.

关 键 词：光交联 聚乙烯 表面氧化 抗氧化 XLPE XPS 

分 类 号：O632.12[理学—高分子化学]