الفهرس 
acknowledgmentOnly 14 pages are availabe for public view
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Abstract
The aim of the thesis is to study the effect different doses of X-ray radiation of 10 MeV energy on some mechanical and physical properties of the HDPE and LLDPDE film sampels.Chapter 1 is a general introduction on Polymer;the molecular structure,classifications,nature,processing methods and applications of polymer and polyethylene grades, the ionization radiation definition types action with mater ans radiation dose types and relation between electromagnetic radiation and ionized radiation.