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Polypropylene (PP) has a rich source of raw materials , cheap , easy molding , low density , excellent mechanical properties , good electrical insulation , dielectric constant less stress cracking resistance and chemical resistance and other advantages. However, poor PP cold , cold easy to rattle , product size and large shrinkage , limiting its scope of application , it must be through a variety of physical and chemical methods for modifying its processing to improve its performance , expanded range of applications, to meet different needs. In this paper, PP resin as matrix , adding polyolefin elastomer (POE) and nano- CaCO 3 particles , stearic acid surface treatment agent , using different ratios of POE, prepared by the PP / POE blend materials and PP / POE / nano CaCO 3 composite two systems by mechanical testing and finite element analysis, the mechanical properties of the two systems and toughening mechanism of in-depth discussions . Prepared by physical blending PP / POE blends and PP / POE / Nano CaCO 3 composites, and test its mechanical properties, including tensile , impact and flexural properties. The results show that the two systems were significantly increased impact strength , tensile strength, tensile modulus, flexural strength and modulus decreased, elongation at break and tensile strength are reduced. According to Hooke's law , derive a plastic / elastomer blends quantitative tensile modulus of the formulas described , the use of the formula PP / POE blend tensile elastic modulus higher than the calculated value calculated using the mixing rule value is closer to the actual value. Application of ANSYS software PP / POE blends in tensile load and impact load of interfacial stress finite element analysis . The results show that the tensile loads , POE particle interface stress is low, bear load is small , the tensile strength is caused by reasons for the decline ; under impact loads , POE particles have a greater strain , absorb a lot of impact energy , is one of the reasons causing increased toughness . Binding experiments discussed PP / POE Blends toughening mechanism , PP / POE / Nano CaCO 3 composites reinforced, toughened mechanism and discusses impact PP / POE blends and PP / POE / nano- CaCO 3 composite mechanical properties of two main factors.
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