Poe And Inorganic Filler Modified The Structure And Performance Study Of Polyamide 66

In this study, nano-CaCO3, polyethylene-octene elastome (POE), polyethylene-octene elastomer-grafted-maleic anhydride (POE-g-MA) and nylon66(PA66) composites were prepared by melt processing and analyzed by means of SEM, XRD, DSC and mechanical testing. Select the most optimal formula, preparation of high strength and high toughness, low water absorption, low-cost materials, and study on its blending process. The CaCO3/POE-g-MA/PA66composites with low-cost materials, high strength and high toughness were obtained by the optimization of material composition and its blending process.The nano-CaCO3/PA66blends were prepared by melt compounding using a twin screw extruder, and analyzed by means of SEM, DSC and XRD. The effects of nano-CaCO3content on mechanical properties, melt processability and morphology of PA66were investigated. The results demonstrate that20wt%nano-CaCO3can increase the rigidity of PA66, improve the processability of materials and reducing costs. When the nano-CaCO3content is more than20wt%, it will decrease tensile strength and flexural strength of nano-CaCO3/PA66blends.The effects of polyethylene-octene elastome (POE) and polyethylene-octene elastomer-grafted-maleic (POE-g-MA) on mechanical properties and melt flow rate of nylon66(PA66) were investigated. In addition, the morphology and structures were analyzed by means of SEM, DSC and XRD. The results demonstrate that the addition of POE and POE-g-MA can improve the melt processability of composite, affect the crystallization behavior of PA66to some extent and increase the crystallization temperatures. Compared with POE, POE-g-MA can more effectively improve the impact strength and melt processability of PA66while maintaining relatively higher tensile strength. These results stemmed largely from a finer dispersion of POE-g-MA in composite material and stronger interfacial adhesion between POE-g-MA and PA66matrix.The nano-CaCO3/POE/PA66and nano-CaCO3/POE-g-MA/PA66ternary blends were prepared by melt compounding using a twin screw extruder, and analyzed by means of SEM, DSC and XRD. The effects of elastomer content and blending sequence on mechanical properties, melt processability and morphology of20wt%nano-CaCO3/PA66composites were investigated. The results demonstrate that POE-g-MA has good miscibility with PA66and result in a finer dispersion of POE-g-MA in nano-CaCO3/PA66matrix. POE-g-MA can enhance the crystal formation of PA66in the composites, and effectively improve the impact strength and melt processability of nano-CaCO3/PA66composite. Compared with blending simultaneously, extruding twice in which nylon66was first reinforced with nano-CaCO3and the nano-CaCO3/PA66composite was later blended with POE-g-MA resulted in finer dispersion of nano-CaCO3and better comprehensive properties of nano-CaCO3/POE-g-MA/PA66(20/10/70) ternary composites.