Preparation And Characterization Of High Strength PA1010Nanocomposites

PA1010is a special kind of engineering plastics in our country and owns very good wearresistance, self-lubrication, low temperature performance. However, the lower notched impactstrength, relatively narrow melt temperature range of PA1010limit its application in the area.We add OMMT into nano-CaCO₃to make OMMT promote the spread of nano-CaCO₃inorder to reinforce toughness and strength of matrix. The ternary blend constructed frompolymer and two kinds of inorganic nanoparticles is paid much attention due to its superiorcomprehensive performance. Enhancing better mechanical properties of ternary blend systemnot only depends on the ratio of adding content, but also by plastic interfacial morphology,even relative dispersion between added components. These can effectively improve theproperties of tensile, flexural and impact properties of polymer through toughening agentaction between two kinds of inorganic nanoparticles.By melt blending using twin-screw extruder, we prepared PA1010/OMMT nanocompositesand PA1010/nano-CaCO₃nanocomposites. And then we tested them by mechanical testing toobtain the best comprehensive mechanical properties of them. The OMMT content of formeris5%, at this time tensile strength is40.63MPa，flexural strength is43.83MPa and Izodimpact strength is7.25KJ/m²; and the nano-CaCO₃content of latter is7%, at this time tensilestrength is41.80MPa，flexural strength is50.30MPa and Izod impact strength is4.56KJ/m²..PA1010/OMMT/nano-CaCO₃ternary nanocomposites were prepared by taking OMMT andnano-CaCO₃as fillers through melt blending using twin-screw extruder. The influences ofOMMT on PA1010/nano-CaCO₃and nano-CaCO₃on PA1010/OMMT were investigated bymeans of scanning electron microscope（SEM） and mechanical testing. The results show that: for PA1010/nano-CaCO₃system, the interfacial adherence between OMMT and matrixPA1010weakens the adherence between nano-CaCO₃and PA1010, the toughness enhanceswith the addition of OMMT is little（less than2%）, meanwhile the tensile strength and flexuralstrength significantly improve. However, for PA1010/OMMT system, the interfacialadherences between OMMT, nano-CaCO₃and matrix PA1010are in a offset balance, so thetoughness of system improves slightly.Different kinds of OMMT were added into PA1010/CaCO₃nanocomposites to preparePA1010ternary nanocomposites by melt blending method via twin screw extruder, Whichwere characterized by Mechanics Performance Testing, Scanning Electron Microscope（SEM）,X-Ray Diffraction（XRD） and Differential Scanning Calorimetry meter（DSC）. The resultsrevealed OMMT of larger interlayer spacing weaken strong adsorption force betweennano-CaCO₃and matrix so as to boost tensile strength and flexural strength. While addition ofOMMT is1%, Izod impact strength is8.5KJ/m², tensile and flexural strength of which arehigher than pure PA1010.OMMT of less interlayer spacing could produce more yield and empty in order to makematrix appear plastic fracture characteristics to improve toughness by SEM. Meanwhile moreforward translation retrains the formation of α-form while facilitates that of γ-form throughWAXD.