Abstract
The samples of type EPDM (ethylene-propylene-dienmonomer) rubber and elastoplastic mixtures obtained with either polyethylene or polypropylene in various weight percentages were studied using IR spectroscopy, thermal analysis as well as optical microscopy. The analyses proved the compatibility between EPDM elastomers and investigated plastic materials. The results could be used for choosing the suitable compositions, processing and fields for application of these composites. Keywords: EPDM (ethylene-propylene-dienmonomer) rubber, polyethylene, polypropylene, IR spectroscopy, thermal analysis