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Abstract <p>The crosslinking of polyethylene of pipe grades under irradiation with 900-keV electrons at absorbed doses of 50 to 400 kGy in the presence of antioxidants and a crosslinking agent has been studied. The degree of crosslinking of polyethylene has been measured based on the concentration of a gel fraction determined by its extraction in xylene. It has been shown that a 60% degree of crosslinking was achieved at a dose of about 100 kGy in all cases. It is reasonable to combine a standard method for determining the gel fraction with visual inspection of samples to identify the conditions for the formation of an excessively low-melting material. It has been shown that the nonuniformity of the crosslinking degree at a level of ±7% can be achieved at a dose nonuniformity of up to ±50%.</p>

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Uniformity of Electron Beam Crosslinking of Polyethylene Depending on the Distribution of Absorbed Radiation Dose

  • 期刊论文

  • 发表日期：

    2025年8月6日

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  • A. V. Popova,
  • K. A. Artamonova,
  • A. V. Bludenko,
  • E. M. Kholodkova,
  • S. I. Vlasov,
  • A. V. Ponomarev

摘要

Abstract

The crosslinking of polyethylene of pipe grades under irradiation with 900-keV electrons at absorbed doses of 50 to 400 kGy in the presence of antioxidants and a crosslinking agent has been studied. The degree of crosslinking of polyethylene has been measured based on the concentration of a gel fraction determined by its extraction in xylene. It has been shown that a 60% degree of crosslinking was achieved at a dose of about 100 kGy in all cases. It is reasonable to combine a standard method for determining the gel fraction with visual inspection of samples to identify the conditions for the formation of an excessively low-melting material. It has been shown that the nonuniformity of the crosslinking degree at a level of ±7% can be achieved at a dose nonuniformity of up to ±50%.