废旧轮胎胶粉/PP共混材料的研究

Study on Waste Tire Powder Modified Polypropylene Blend

研究了不同含量的废旧轮胎胶粉对聚丙烯力学性能的影响,并采用脱硫、自由基聚合反应改善两相的相容性。结果表明:加入未经处理的胶粉时,共混材料拉伸强度和断裂伸长率随着胶粉含量的增加而降低。当胶粉含量为70%(质量分数,下同)时,拉伸强度由37MPa降至7MPa,断裂伸长率由108%降至35%左右。冲击强度随着胶粉含量的增加呈现先升后降趋势,当胶粉含量为20%时,冲击强度达到14kJ/m2。加入处理后的胶粉,拉伸强度随胶粉含量的增加而降低的趋势变缓;冲击强度和断裂伸长率随胶粉含量的增加呈现先升后降趋势,胶粉含量为30%时,冲击强度可达18.5kJ/m2,断裂伸长率约为320%。

The mechanical properties of polypropylene/waste tire powder （WTP） composites were studied. The compatibility between the components was improved by shucking off sulfur and free radical reaction. It was found that the tensile strength and elongation at break were decreased with increasing tire powder. When the tire powder content was 70 wt %, the tensile strength decreased from 37 MPa to 7 MPa, the elongation at break decreased from 108 % to 35 %. Impact strength increased first and then decreased as content of tire powder increased. When the content was 20 %, impact strength was 14 kJ/m^2. When modified tire powder was employed, these mechanical properties were improved. When the fire powder content was 30 wt%, the impact strength and elongation at break were 18.5 kJ/m^2 and 320 %, respectively.