Journal
RADIATION PHYSICS AND CHEMISTRY
Volume 77, Issue 2, Pages 146-153Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.radphyschem.2007.04.017
Keywords
polymer blends electron-beam irradiation; compatibilisers; crystallinity; differential scanning calorimetry (DSC); recycling
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The aim of this article was to show the effects of the electron radiation dose and presence of a compatibiliser on the peak melting temperature (T-pm) of the crystalline phase, crystallinity (X-c), and melt flow rate (MFR) of granulated blends of low-density polyethylene (LDPE), high-density polyethylene (HDPE), polypropylene (PP), polystyrene (PS), and polyethylene terephthalate (PET) as well as of blends of LDPE, HDPE, and PP. The purpose of applying the high-energy electron radiation with doses up to 300 kGy and of adding a compatibiliser was to enhance mechanical properties of the studied blends and, at the same time, to investigate the possibility of using this technique in the processes of recycling polymeric materials. As the compatibilisers, the styrene-ethylene/butylene-styrene elastomer grafted with maleic anhydride (SEBS-g-MA) and trimethylol propane trimethacrylate (TMPTA) were utilised, they were added at the amounts of 5, 10, and 15 wt% and 1, 2, and 3 wt%, respectively. The enhancement of mechanical properties was accompanied by the following effects, discussed in this article: (i) a decrease in the peak melting temperature upon the electron radiation for the crystalline phase of LDPE, HDPE, and PP that constituted the studied granulated blends and (ii) changes in NFR upon both the electron radiation and the addition of compatibilisers. (c) 2007 Elsevier Ltd. All rights reserved.
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