Automotive and aeronautic industries require good corrosion protection combined with good mechanical reinforcement of aluminum substrates due to severe conditions of use. Polymeric films and more particularly hybrid ones based on organic matrices filled with inorganic particles have been applied to solid substrates for decorative, protective, and functional purposes. They present many advantages since they combine the properties of the organic phase such as flexibility, good processibility and those of the inorganic phase such as mechanical strength, scratch resistance, thermal stability, etc.The aim of the present work is to synthesize through sol-gel approach new hybrid polymeric nanocomposites to be used as coating materials. An acrylic-based polymer was prepared by free-radical copolymerization in which silica nanoparticles were incorporated by in situ acid hydrolysis. Subsequent photo-crosslinking is performed in order to enhance mechanical properties of such coating. The morphology, chemical, thermal, mechanical properties and corrosion resistance of thin films applied on aluminum alloys were assessed by atomic force microscopy (AFM), differential scanning calorimetry (DSC) and thermal gravimetric analysis (TGA), and electrochemical impedance spectroscopy (EIS). 

Improved mechanical and corrosion properties of hybrid thin films based on epoxidized acrylic copolymers loaded with silica particles

245th National Meeting (2013)

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