无水硫酸钙/纳米SiO2对废旧PP的改性研究  

Study on Modification of Waste PP by Anhydrous Calcium Sulfate/Nano-SiO2

作　　者：叶夏 黄颖为[1] Ye Xia;Huang Yingwei(Xi'an University of Technology,Xi'an 710048,China)

机构地区：[1]西安理工大学

出　　处：《塑料科技》2019年第9期124-127,共4页Plastics Science and Technology

摘　　要：用双螺杆挤出机制备了废旧聚丙烯(PP)/无水硫酸钙/纳米SiO2三元复合材料,并通过拉力试验机、冲击试验机、熔体流动速率测定仪、扫描电镜、光电子能谱等仪器研究了无水硫酸钙与SiO2对PP复合材料力学性能和熔体流动速率的影响。结果表明:无水硫酸钙的加入会细化PP颗粒,SiO2的加入提高了复合材料的拉伸强度和熔体流动速率;当SiO2用量为2份、无水硫酸钙用量为5份时,复合材料的拉伸强度、断裂伸长率和冲击强度分别达到10.73 MPa、3.51%和8.31 kJ/m^2。与废旧PP/SiO2(2份)的8.42 MPa、8.71%、5.41 kJ/m2相比,拉伸强度与冲击强度分别提高了27.43%和53.60%,而断裂伸长率下降了59.7%。Waste polypropylene(PP)/anhydrous calcium sulfate/nano-SiO2 ternary composite was prepared by twin-screw extruder and passed through tensile testing machine,impact testing machine,melt flow rate measuring instrument,scanning electron microscope and photoelectron spectroscopy.The effects of anhydrous calcium sulfate and SiO2 on the mechanical properties and melt flow rate of PP composites were investigated.The results show that the addition of anhydrous calcium sulfate can refine PP particles,and the addition of SiO2 can improve the tensile strength and melt flow rate of the composites.When the dosage of SiO2 is 2 phr and the dosage of anhydrous calcium sulfate is 5 phr,the tensile strength,elongation at break and impact strength of the composites reach 10.73 MPa,3.51%and 8.31 kJ/m^2,respectively.Compared with the waste PP/SiO2(2 phr)of 8.42 MPa,8.71%,5.41 kJ/m^2,the tensile strength and impact strength were increased by 27.43%and 53.60%,respectively,and the elongation at break decreased by 59.7%.

关 键 词：废旧聚丙烯 无水硫酸钙 二氧化硅 改性 性能 

分 类 号：TQ325.14[化学工程—合成树脂塑料工业]