High density polyethylene irradiation method

Since I consider sterilisation by irradiation a very suitable method there seems no point in using ethylene oxide which must surely be soluble in this plastic. Ethylene oxide freely penetrates two layers of low density polyethylene 250 micron thick and until proved otherwise, I think one has to accept that it will be very soluble in high density polyethylene. I fail to see how one can be sure of getting out all the ethylene oxide when double wrapped, even with the precautions mentioned in this letter. 

Keywords Processing methods, characterization methods, high-density polyethylene scanning electron microscopy, atomic force microscope, gamma rays irradiation... 

A good AEM should fulfill stringent mechanical, thermal, and chemical properties as mentioned in Section 11.2. Historically, the first AEM material was developed by researchers from the Toknyama Soda Company. They introduced quaternary ammonium groups to the divinylbenzene-cross-linked polychloropropene polymer matrix via trimethylamine. Since then, several membrane-associated companies explored various kinds of AEMs and pushed them to commercial market most of them were based on cross-linked polystyrene, polyvinyl alcohol, low (or high)-density polyethylene, and other aliphatic polymers through irradiation-grafting method. The primary objective of developing these materials was for applications in the fields such as electrodialysis, desalination, selective electrode, and waste acid recovery. However, they showed performance in AEM fuel cells far below practical... 

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