高等学校化学学报

高等学校化学学报 ›› 2001, Vol. 22 ›› Issue (9): 1610.

• 研究论文 • 上一篇    

聚乙烯光引发交联过程中的表面光氧化和光稳定

吴强, 瞿保钧, 吴强华   

  1. 中国科学技术大学火灾科学国家重点实验室, 高分子材料科学与工程系, 合肥 230026
  • 收稿日期:2001-01-28 出版日期:2001-09-24 发布日期:2001-09-24
  • 通讯作者: 瞿保钧(1943年出生),男,博士,教授,博士生导师,主要从事聚合物光化学和聚烯烃无卤阻燃的研究.
  • 基金资助:

    国家自然科学基金(批准号:59773030)资助

Surface Photo-oxidation and Photostabilization in Photoinitiated Crosslinking of Polyethylene

WU Qiang, QU Bao-Jun, WU Qiang-Hua   

  1. State Key Laboratory of Fire Science and Department of Polymer Science and Engineering, University of Science and Technology of China, Hefei 230026, China
  • Received:2001-01-28 Online:2001-09-24 Published:2001-09-24

PDF (PC)

被引次数

13

摘要： 通过测定凝胶含量并利用红外-光声光谱和光电子能谱对光交联聚乙烯表面氧化程度和氧化产物进行了研究.结果表明,聚乙烯光交联过程中随着光照时间的增加,表面光氧化加剧,氧化产物主要是氢过氧化物和含羰基的化合物.考察了预辐照和添加受阻胺型光稳定剂对聚乙烯光交联过程的影响,发现这两种方法都能有效地降低光交联聚乙烯(XLPE)的表面氧化,但有些光稳定剂会降低XLPE的交联度.

关键词: 光交联聚乙烯, 表面光氧化, 光稳定, 预辐照, 受阻胺光稳定剂

Abstract: The surface photo-oxidation and photostabilization in the photoinitiated crosslinking of polyethylene were studied using Fourier transform infrared spectroscopy(FTIR), X-ray photoelectron spectroscopy(XPS), and the determination of gel content with irradiation time. The data show that the surface photo-oxidation of photocrosslinked polyethylene(XLPE) increases apparently with increasing UVirradiation time. The main photo-oxidation products have been identified as hydroperoxides and various carbonyl compounds. The photostabilization of XLPEcan be realized by suitable pre-irradiation using low pressure mercury(LPM) lamp or by the addition of some hindered amine light stabilizers(HALS). The optimum time of pre-irradiation by LPMlamp is 10 s under the experimental conditions in the present study. However, some HALScan reduce the efficiency of photoinitiated crosslinking process of PE.

Key words: Photocross-linked polyethylene, Surface photo-oxidation, Photostabilization, Pre-irradiation, Hindered Amine Light Stabilizers(HALS)

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