| Epoxy resin and polypropylene are a widely used polymer material in today’s production and life,epoxy resin has excellent processing performance,mechanical properties and stability and other properties,due to its inherent brittleness limits its application,polypropylene has excellent chemical corrosion resistance and mechanical properties and other properties,but its shrinkage is poor,easy aging and other shortcomings limit the application.As a reinforcing material for the preparation of lightweight and high-performance composite materials,hollow glass microspheres have excellent mechanical properties,and the preparation of composite materials by mixing hollow glass microspheres with polymers has become a research hotspot.Therefore,the coupling agent treatment of hollow glass microspheres was carried out to improve the compatibility between microbeads and resin.The density and content of microbeads in polypropylene/hollow glass microbeads were changed,and the influence of microspheres density and content on the properties of the composites was explored.The coupling agent was compounded to obtain the compound pairing agent to modify the microspheres,and the modified microspheres and epoxy resin were blended to obtain composite materials with better comprehensive properties.A variety of different silane coupling agents and different titanate coupling agents were selected to modify the surface of hollow glass microspheres,and the modified hollow glass microspheres were heated and cured by resin blending to obtain modified hollow glass microspheres/epoxy resin composites,and the mechanical properties and water absorption changes of the modified composites were studied.The test results show that the composite modified by coupling agents KH590 and HY109 has the best strength and the lowest water absorption.While ensuring low density,the mechanical properties of composite materials are enhanced.The enhancement of material properties is mainly due to the coupling agent molecule improving the interface bonding between the microspheres and the resin.The coupling agent-modified hollow glass microspheres reinforced polypropylene composites were prepared,and the density and addition amount of hollow glass microspheres had a great influence on the properties of the composites.The performance of polypropylene material is achieved when the density of microbeads is 0.46g/cm~3 and the mass fraction is 5%,and the weight is reduced while maintaining relatively excellent performance.Compared with a single coupling agent,the coupling agent was compounded and found to have a better modification effect.Silane KH550 and KH590 were selected to compound with titanate HY109 and CS401,and the ratio between the two coupling agents was adjusted to study the optimal ratio.The analysis results show that the best comprehensive performance is 0.5%KH550+4.5%KH590 and 1.0%HY109+4.0%CS401,and the dispersion performance of the beads modified by these two complex pairs is improved in the resin matrix,and the binding performance with the resin is enhanced,and the comprehensive performance is improved.Then KH540 and CS201 were compounded,and the compound couple agent was prepared by adjusting the content of the two coupling agents.The results show that when the volume ratio of KH540 and CS201 is 1:1 and the content is 5%,the properties of their composites reach the best.With the increase of the content of the compound coupler,the individual properties of the composite material increase,but with the excess of the compound coupler,the free coupling agent molecules are dispersed in the interior of the composite,thereby reducing the performance of the material.Figure[51]Table[16]Reference[109]... |
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