Study On Polypropylene Toughened And Reinforced By Inorganic Single-filler And Hybrid-filler

Polypropylene (PP) as one of the most important commodity polymers is widely used in technical applications. Because of its good processability, relatively high mechanical properties, great recyclability, and low cost, PP has found a wide range of applications in the household goods, packaging, and automobiles. However, owing to its low modulus, high notch sensitivity, and poor impact resistance, especially under extreme conditions such as low temperatures or high strain rates, the usefulness of PP as an engineering thermoplastic is still limited. So, the challenge of increasing the impact toughness and modulus of PP has provoked considerable interest.Addition of inorganic filler into PP could reduce the cost, but some mechanical properties of the PP composites usually decreased, including the yield strength and impact strength. The challenge how to reinforce and toughen the PP using inorganic filler had provoked extensive interest. A lot of factors could influence the mechanical properties of the PP composites filled with inorganic fillers. In this paper, one sort of calcium carbonate particles with four different average particle sizes was used. The calcium carbonate particles used were with average particle sizes of 25μm (CC25), 4μm(CC4), 1.8μm (CC1.8) and 0.07μm (CC0.07) respectively. Another sort of glass bead particles with four different average particle sizes was also used. The glass bead particles used were with average particle sizes of 15μm (GB15), 10μm (GB10),5μm...