关键词: 聚丙烯(PP), 黏土矿物材料(QE粉), 共混改性, 流变性能, 黏流活化能, 可纺性

Abstract: In order to explore the spinnability of Quantum energy radiating material(QE powder) modified polypropylene(PP) blends, QE powder was used as a modifier, and polypropylene was filled and blended to obtain modified PP slices with different QE particle mass fractions. The shear rheological properties of modified PP slices were tested and characterized by using a double-column capillary rheometer. The modified PP blend fiber was prepared by melt spinning method, and the morphology and mechanical properties of the fiber were tested and analyzed by scanning electron microscope and yarn tenacity meter.The results show that the addition of modifier QE powder does not change the fluid type of the modified PP blend which is still a shear thinning fluid, but enhances its non-Newtonian properties. With the increase of QE powder, the flow resistance of the mixture of QE powder and PP, and the shear viscosity, shear stress and viscous flow activation energy of the modified PP blends are increased;at the temperature of 260 ℃ and the shear rate of 469.58 s^-1, when the mass fraction of QE powder increases to 8%, the non-Newtonian index n value decreases by 19.62%, the shear viscosity increases by 52.60%, and the shear stress also increases by 67.78%compared with pure PP; the QE particles are uniformly loaded on the surface of the modified PP blend fiber, and the fracture strength and elongation of the modified PP fiber decrease.

Key words: polypropylene(PP), quantum energy radiating material(QE powder), blending modification, rheological properties, viscous flow activation energy, spinnability