Preparation and mechanical properties prediction of polypropylene/montmorillonite nanocomposites
In this paper,β-nucleated polypropylene/montmorillonite nanocomposites were prepared by melt extrusion.The effects of the amount of montmorillonite,β-nucleating agent and compatibilizer on the notched impact strength and flexural strength of the composites were investigated,and BP neural network was used to predict.The results showed that the increasing amount of montmorillonite is helpful to improve the strength of the composites but unfavorable to the toughness.The notched impact strength of the composites is increased slightly with the increase of β-nucleating agent dosage,while the flexural strength has an optimal value,that is,the bending strength reaches a maximum of 35.06 MPa when 0.1％β-nucleating agent is added,which is 13.68％higher than that without β-nucleating agent.With the increase of the amount of compatibilizer,the toughness of the composites increased significantly,though with some loss in strength.The notched impact strength of the composite with 30％compatibilizer is about 3 times that of composite when which is not added,while the tensile strength is only reduced by 28.39％.The prediction results of BP neural network showed that the model can accurately predict the mechanical properties of the composites.This study has reference significance for optimizing the preparation and improving the mechanical properties prediction of polypropylene-based nanocomposites.
万方数据
维普
