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High Energy Chemistry

, Volume 39, Issue 3, pp 142–147 | Cite as

Structural aspects of the radiation modification of the dielectric properties of polyolefins

  • A. M. Magerramov
  • M. K. Dashdamirov
Radiation Chemistry

Abstract

The effects of crystallization conditions and supermolecular structure on the processes of radical formation and changes in the dielectric (tanδ; ε) and strength (Est) properties of LDPE, HDPE, and PP under exposure to γ-radiation were studied. It was found that polyolefin specimens with a high crystallinity exhibited an enhanced electric strength, radiation stability, and a high yield of quasi-stable radicals at 293 K. It was assumed that a possible mechanism of the electric strengthening of PE and PP by their radiation modification (at radiation doses of 30–50 and to 5–6 Mrad, respectively) consists in a reaction of the type R· + e → R, the capture of trapped electrons by quasi-stable radicals.

Keywords

Radiation Physical Chemistry Crystallization Radiation Dose Dielectric Property 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© MAIK “Nauka/Interperiodica” 2005

Authors and Affiliations

  • A. M. Magerramov
    • 1
  • M. K. Dashdamirov
    • 1
  1. 1.Institute of Radiation ProblemsAcademy of Sciences of AzerbaijanBakuAzerbaijan

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