Wplyw promieniowania elektronowego oraz elastomeru styrenowego na wybrane wlasciwosci mechaniczne kompozytow polimerowych

Abstract

Polymer composites of the following compositions (in wt. %) were obtained: low density polyethylene (PE-LD) - 24, high density polyethylene (PE-HD) - 23, polypropylene (PP) - 21, polystyrene (PS) - 15, and poly(ethylene terephthalate) (PET) - 17. The parts mentioned correspond to the compositions of polymer packaging wastes occurring in Poland. A compatibilizer, namely styrene-ethylene/butylene-styrene elastomer grafted with maleic anhydride (SEBS-g-MA), was introduced into polymeric system in amounts of 5, 10 or 15phr. The effects of compatibilizer part and electron radiation doses in the range 0-300kGy on the following mechanical properties of the composites were studied: offset yield strength (..., Fig. 2), yield point (..., Fig. 3), stress at break (?B, Fig. 4), unit elongation at yield point (..., Fig. 5) and unit elongation at break (..., Fig. 6). It was found that the most important features of the system, i.e. ?02 and ?y, decreased with increasing part of SEBS-g-MA while the effect of radiation dose on these properties was not significant. The latter could result from the presence of aromatic rings in PS and PET, protecting the macromolecules against radiation.