Thermoplastic elastomeric composition based on ground rubber tire

Ground rubber tire (GRT) is a particulate vulcanizate consisting mainly of rubber hydrocarbon and fillers. Rubber hydrocarbon of GRT (rGRT) has been u sed as a partial substitute for EPDM rubber in a dynamically vulcanized EPD M/acrylic-modified HDPE (A-HDPE) blend. The blends with higher rubber conte nt show poor processability and physical properties, while the compositions with higher plastic content behave like toughened plastics. However, the 6 0:40 rubber/plastic blend was found to behave as a thermoplastic elastomer, and it was observed that 50% of EPDM can be replaced by rGRT without deter ioration in properties.