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Publication Citation: Surface and Interface Microstructures of Coatings Systems and Their Implication on Service Life

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Author(s): Tinh T. Nguyen; Xiaohong Gu; Mark R. VanLandingham; D Nguyen; M Giraud;
Title: Surface and Interface Microstructures of Coatings Systems and Their Implication on Service Life
Published: March 01, 2002
Abstract: The surface and interface properties have a strong influence on the adhesion and service life of polymer coatings applied to plastics and metals. However, both the surface and interface chemical composition and microstructure of coated materials are affected by the surrounding environments and processing conditions during film formation. In this study, the surface and interface properties of several coatings have been characterized with nanoscale resolution using atomic force microscopy (AFM). Specimens were prepared by applying thick films of coatings on the substrates. Both the cross-sections and surfaces that were in contact with the substrates during curing were used for the interface characterization. Interpretation of AFM results was aided by data collected using attenuated total reflection-Fourier transform infrared spectroscopy and contact angle measurements. Curing conditions and stoichiometry transform infrared spectroscopy and contact angle measurements. Curing conditions and stoichiometry have a strong influence on the interface region. Further, microstructure and chemical composition of the film surface adjacent to the substrate are different from those of the surface exposed to air. The implications of these differences on the wettability, weatherability, and adhesion of coated systems are discussed.
Conference: International Conference on Durability of Building Materials and Components
Proceedings: Proceedings of the 9th International Conference on Durability of Building Materials and Components
Location: AS
Dates: March 1, 2002
Keywords: AFM;building technology;coatings;durability;interface;interphase;microstructure;nanoscale;surface
Research Areas: Building and Fire Research
PDF version: PDF Document Click here to retrieve PDF version of paper (1MB)